Annual Broadleaf Weeds

2,4-D (several trade names)

Rate 0.25 to 1.25 lb ae/a

Time Apply when barley is fully tillered but before jointing.

Remarks Individual 2,4-D labels vary slightly on use rates and application timing. Check label to ensure proper rate and application timing. Higher rates are for fall-planted barley, and not spring-planted barley. Be aware that 2,4-D may be formulated with 3.74, 3.8, 5, 5.5, 5.6 and 6 lb ae/gal; be sure to use the correct amount of herbicide depending on the formulation. Preharvest interval is 14 days. Amine formulations require 6 hours before they are rainfast and LVE formulations require 1 hour. Restricted entry interval (REI) is 12 hours for the low volatile ester (LVE) formulation and 48 hours for the amine formulation.

Caution Do not forage or graze treated grain fields within 2 weeks after treatment. Do not feed treated straw to livestock. Do not let 2,4-D drift off target. Check label for maximum amount allowed per crop cycle. Do not apply through any type of irrigation system.

Site of action Group 4: synthetic auxin

Chemical family Phenoxy acetic acid

bicyclopyrone + bromoxynil (Talinor)

Rate 0.033 to 0.044 lb ai/a bicyclopyrone + 0.156 to 0.207 lb ae/a bromoxynil acid equivalent (13.7 to 18.2 fl oz/a Talinor)

Time Apply to barley from 2-leaf to pre-boot stage

Remarks Co-packed with CoAct+ additive which must be added at the rate specified on the label. Compatible with many commonly used tank-mix partners. Add a crop oil concentrate (COC) at 1% v/v of the finished spray volume. Although COC is the preferred adjuvant, NIS may be substituted at 0.25% v/v. When tank mixed with herbicides that have a built-in adjuvant, no additional adjuvant is needed. Rainfast in one hour. Restricted entry interval (REI) is 24 hours.

Caution Do not exceed more than 18.2 oz/a per year. Do not treat wheat underseeded with legumes. Do not graze livestock or harvest forage for hay from treated wheat or barley for a minimum of 30 days following application. Do not harvest grain for a minimum of 60 days following application. Do not feed treated wheat or barley straw to livestock for a minimum of 60 days following application. Follow label instructions on crop rotations. Do not apply through any irrigation system.

Site of action (bicyclopyrone) Group 27: 4-hydroxyphenylpyruvatedioxygenase (HPPD) inhibitor; (bromoxynil) Group 6: photosystem II inhibitor

Chemical family (bicyclopyrone) Triketone; (bromoxynil) Nitrile

bromoxynil (several trade names)

Rate 0.25 to 0.5 lb ai/a

Time Apply after barley emergence and prior to the boot stage. Apply to the weeds up to the four-leaf stage, or 2 inches tall, or 1 inch diameter, whichever is first.

Remarks Do not graze for 45 days. Be aware that bromoxynil is formulated as 2 lb and 4 lb ai/gal; be sure to use the correct amount of herbicide. Bromoxynil is very compatible with many other broadleaf herbicides. Control is more consistent with tank-mixtures. Restricted entry interval (REI) is 24 hours.

Caution Do not graze treated fields within 45 days following application. Do not apply when crop is under moisture stress. The total cumulative rate must not exceed 2 pints/a per season.

Site of action Group 6: photosystem II inhibitor

Chemical family Nitrile

bromoxynil + fluroxypyr + MCPA (Carnivore)

Rate 0.21 to 0.312 lb ai/a bromoxynil, 0.084 to 0.125 lb ae/a fluroxypyr, 0.21 to 0.312 lb ae/a MCPA (1 to 1.5 pints/a Carnivore 4EC)

Time Apply when barley is in the 2-leaf stage up to and including flag leaf emergence. To suppress volunteer potatoes, apply before potato plants are 4 inches tall.

Remarks Apply 1 pint/a if seedlings of susceptible species are less than 4 inches tall. For seedlings 4 to 8 inches tall and volunteer potatoes apply 1.5 pints/a. Do not apply when crop canopy covers the weeds, or control will be poor. Rainfast within 1 hour after application. Restricted entry interval (REI) is 24 hours. Do not apply more than 2.4 pints/a per crop season.

Caution Do not allow mixture to drift off target. Do not apply within 40 days prior to harvesting grain, or within 14 days prior to cutting hay. Do not apply through any irrigation system.

Site of action (bromoxynil) Group 6: photosystem II inhibitor; (fluroxypyr and MCPA) Group 4: synthetic auxin

Chemical family (bromoxynil) Nitrile; (fluroxypyr and MCPA) Phenoxy acetic acid

bromoxynil + MCPA (several trade names)

Rate 0.5 to 1 lb ai/a

Time Apply in spring when barley is in the 3-leaf stage but before it reaches boot stage. Application timing to weeds depends on weed species, but generally up to the 4-leaf stage or 2 inches tall, whichever comes first. If weed forms rosette, apply before weeds exceed 1.5 inch in diameter. Most effective when applied to weeds up to 2 inches tall or in diameter.

Remarks Use higher rate for larger or more resistant weeds. Be aware that bromoxynil + MCPA is formulated as 4 lb and 5 lb ae/gal; be sure to use the correct amount of herbicide depending on the formulation. Controls some large broadleaf weeds, but consistency declines with increasing weed size. Do not apply when crop is under moisture stress. Runoff of this product will be reduced by avoiding applications when rainfall is forecasted to occur within 48 hours. Restricted entry interval (REI) is 24 hours.

Caution Do not graze treated fields for 45 days after application. Do not permit mixture to drift off target.

Site of action (bromoxynil) Group 6: photosystem II inhibitor; (MCPA) Group 4: synthetic auxin

Chemical family (bromoxynil) Nitrile; (MCPA) Phenoxy acetic acid

bromoxynil + pyrasulfotole (Huskie)

Rate 0.15 to 0.21 lb ai/a bromoxynil + 0.027 to 0.037 lb ai/a pyrasulfotole (11 to 15 oz/a Huskie 2.06EC)

Time Apply to actively growing barley after the one-leaf growth stage, up to flag leaf emergence. For best results, apply to young actively growing weeds.

Remarks Compatible with many commonly used tank-mix partners. Spray additives such as ammonium sulfate (AMS) at 0.5 to 1 lb/a, urea ammonium nitrate (UAN) at 1 to 2 quarts/a, or nonionic surfactant (NIS) at 0.25 to 0.5% v/v (1 to 2 qt/100 gal of spray solution) may be used especially under challenging conditions to optimize herbicidal activity. Apply to actively growing weeds alone or in a tank-mix with other herbicides. Rain within 1 hour after application may reduce weed control. Restricted entry interval (REI) is 24 hours.

Caution Do not apply more than once per season. Do not apply more than 15 fl oz/a per season. Check label for crop rotation guidelines. Preharvest interval is 25 days for forage and 60 days for straw or grain. Do not tank mix with tebuconazole fungicide. Do not apply this product with backpack or hand-held application equipment. Do not apply through sprinkler irrigation systems.

Site of action (bromoxynil) Group 6: photosystem II inhibitor: (pyrasulfotole) Group 27: 4-hydroxyphenylpyruvatedioxygenase (HPPD) inhibitor

Chemical family (bromoxynil) Nitrile; (pyrasulfotole) Pyrazole

carfentrazone (Aim EC)

Rate 0.008 to 0.031 lb ai/a (0.5 to 2 fl oz/a Aim 2EC)

Time Apply prior to planting up to the jointing stage, and to actively growing weeds up to 4 inches tall or 3 inches across.

Remarks Apply alone or as a tank-mix with other herbicides to emerged and actively growing weeds. Use higher rates on more mature weeds or dense vegetative growth. Use a nonionic surfactant (NIS) at 0.25% v/v (2 pints/100 gal spray solution) with at least 80% active ingredient. When barley grows in very dry soil, a high-quality sprayable liquid nitrogen fertilizer (2 to 4% v/v or 2 to 4 gal/100 gal spray solution) may be used in addition to the NIS. Restricted entry interval (REI) is 12 hours.

Caution Do not exceed 2 fl oz/a per year. Tank-mixes with EC or ester formulations of other herbicides may increase leaf speckling. Do not use Aim with crop oil concentrate (COC), methylated seed oil (MSO), or silicone-based adjuvants. Do not make applications to foliage wet from dew, rain or irrigation. Increased crop injury may occur. Do not harvest for forage within 7 days after application.

Site of action Group 14: protoporphyrinogen oxidase (PPO) inhibitor

Chemical family Triazolinone

chlorsulfuron (Glean) + another broadleaf herbicide with a different site of action

Rate 0.12 to 0.25 oz ai/a (0.17 to 0.33 oz/a Glean 75 DF). Do not use more than 0.33 oz/a in an 18-month period.

Time Apply in fall or spring any time after most weeds have emerged, and after crop is in two-leaf stage through second joint, but before boot stage.

Remarks Chlorsulfuron controls a wide range of broadleaf annual weeds, and inhibits Canada thistle, but does not control nightshade species. For best results, add a surfactant of at least 80% ai at 0.25 to 0.5% v/v (1 to 2 quarts/100 gal spray solution), unless otherwise specified, and apply to actively growing weeds. For specific weed problems, various tank-mixes are possible; see manufacturer's label for recommendations. Restricted entry interval (REI) is 4 hours.

Caution Do not use on soils above pH 7.9. Chlorsulfuron can persist in soil. Follow label instructions carefully regarding crop rotations. Many crops may not be planted within 24 months or longer after application. See label for cautions on tank-mix or sequential applications with organophosphate insecticides and applications just before or during adverse conditions, such as cold or freezing weather. Do not harvest grain sooner than 45 days after application. Do not apply this product through any irrigation system. Do not apply during fallow. Only make one application per season.

Site of action Group 2: acetolactate synthase (ALS) inhibitor

Chemical family Sulfonylurea

chlorsulfuron + metsulfuron (Finesse) + another broadleaf herbicide with a different site of action

Rate 0.15 to 0.3 oz ai/a fall (0.2 to 0.4 oz/a Finesse 75DF) or 0.15 to 0.23 oz ai/a spring (0.2 to 0.3 oz/a Finesse 75DF)

Time Apply after crop is in two-leaf through second-joint, but before boot stage.

Remarks Finesse controls a wide range of broadleaf weeds and inhibits Canada thistle. For best results, add a surfactant of at least 80% active ingredient at a rate of 0.125 to 0.5% v/v (0.5 to 2 quarts/100 gal spray solution). Do not use low rate or liquid nitrogen fertilizer as a substitute for nonionic surfactant (NIS). Various tank-mixes are possible for specific weed problems (consult label). Restricted entry interval (REI) is 4 hours.

Caution Do not use on soils above pH 7.9 because Finesse can persist in soil. Do not apply before barley emerges or crop will be injured. Carefully follow label instructions on crop rotations. Many crops may not be planted within 2 years or longer after application.

Site of action (both) Group 2: acetolactate synthase (ALS) inhibitor

Chemical family (both) Sulfonylurea

clopyralid (Stinger)

Rate 0.09 to 0.125 lb ae/a (0.25 to 0.33 pint/a Stinger 3SC)

Time Apply to actively growing weeds when crop is in three-leaf to early boot growth stage. Only weeds emerged at application will be affected.

Remarks Effective on weeds in the sunflower and legume family such as common cocklebur, common groundsel, mayweed chamomile, salsify, pineappleweed, sunflower, clover, volunteer beans and lentils. Addition of an adjuvant is not usually necessary. If a surfactant is desired, use a nonionic surfactant (NIS) with at least 80% active ingredient and do not exceed 0.125% v/v (1 pint/100 gal spray solution). Extreme growing conditions such as drought or near freezing temperatures prior to, at or following application may reduce weed control and increase risk of crop injury at all growth stages. Applications are rainfast within 6 hours after application. Restricted entry interval (REI) is 12 hours.

Caution Do not apply if the barley is underseeded with a legume. Do not harvest for hay. Do not plant alfalfa, asparagus, mint or onions within 10.5 months after application. Do not plant dry beans, lentils, peas, potatoes (including potatoes grown for seed), and broadleaf crops grown for seed, excluding Brassica (mustard) species for 18 months after application. Consult label for additional crop rotation restrictions related to annual precipitation. Do not exceed a total of 0.33 pt/a per year. Do not allow lactating dairy or meat animals to graze for 1 week after application. Do not harvest hay from treated grain fields. Do not apply by air during an air temperature inversion. Do not apply through any type of irrigation system.

Site of action Group 4: synthetic auxin

Chemical family Pyridine

clopyralid + 2,4-D amine (Curtail or Commando)

Rate 0.095 to 0.126 lb ae/a clopyralid + 0.5 to 0.67 lb ae/a 2,4-D amine (2 to 2.66 pints/a Curtail or Commando 2.38 SC)

Time Apply in spring to young, actively growing barley once four leaves have unfolded on the main stem and tillering has begun, up to jointing stage (first node on stem detectable). Apply to weeds before exceeding 3 inches in height or diameter.

Remarks This combination is particularly effective on members of the sunflower family, including mayweed chamomile, sunflower and Canada thistle. Controlling tough winter annual weeds such as corn gromwell and fiddleneck requires tank mixing with other herbicides. Do not exceed 1.75 lb ae/a of 2,4-D per single crop year. Check labels for details on tank-mixtures. Buctril or Banvel tank mixes may be useful to broaden the annual weed control spectrum but may reduce control of perennials such as Canada thistle. Addition of an adjuvant is not usually necessary. If a surfactant is desired, use a nonionic surfactant (NIS) with at least 80% active ingredient and do not exceed 0.5% v/v (4 pints/100 gal spray solution). Extreme growing conditions such as drought or near freezing temperatures prior to, at, or following application may reduce weed control and increase risk of crop injury at all growth stages. Do not apply this product through any irrigation system. Applications are rainfast within 6 hours after application. Restricted entry interval (REI) is 48 hours.

Caution Do not apply if the barley is underseeded with a legume. Curtail and Commando can persist in soil. Do not plant wheat, barley, oats, field corn, or grasses within 30 days of applying. Do not rotate to canola, flax, or sugar beets within 5 months after application. Do not rotate to asparagus, Brassica (mustard) species grown for seed, cole crops, mint, onions, popcorn, or sweet corn for 12 months after application. Do not rotate to alfalfa, lentils, dry beans, peas, potatoes (including potatoes grown for seed), broadleaf seed crops (excluding Brassica species) or safflower for at least 18 months after treatment, depending on annual precipitation. Carefully follow label rotation restrictions with other crops.

Site of action (both) Group 4: synthetic auxin

Chemical family (clopyralid) Pyridine; (2,4-D) Phenoxy acetic acid

clopyralid + fluroxypyr (WideMatch or Colt AS)

Rate 0.094 to 0.125 ae/a clopyralid + 0.094 to 0.125 ae/a fluroxypyr (1 to 1.33 pints/a WideMatch or Colt AS 1.5SC)

Time Apply to actively growing barley from the three-leaf stage up to and including flag leaf emergence. Apply when weeds are actively growing, but before weeds are 4 inches tall or vining. For volunteer potato suppression, apply before potato plants are 6 inches tall.

Remarks This combination will control a number of weed species. It is particularly effective on Canada thistle, mayweed chamomile, catchweed bedstraw, wild buckwheat, common groundsel, kochia, Russian thistle, nightshade species, and volunteer beans, lentils, peas, and potato. To obtain season-long control of perennial weeds such as Canada thistle, apply when the majority of the basal leaves have emerged from the soil up to the bud stage. For suppression of volunteer potatoes, apply before potato plants are 6 inches tall. May be applied in tank-mix combinations with labeled rates of other products. Do not apply more than 1.33 pints/a per growing season. Compatible with all grass herbicides. Frost 3 days before or after application may reduce weed control and crop tolerance. Restricted entry interval (REI) is 12 hours.

Caution Do not apply if the barley is underseeded with a legume. Residues of WideMatch and Colt AS in treated plant tissues that have not completely decayed, may affect succeeding susceptible crops. Do not harvest sooner than 40 days after application. Do not rotate to canola, cole crops (including Brassica species grown for seed), flax or sugar beets within 120 days after application. Do not rotate to alfalfa, asparagus, dry beans, mint, or onions for 12 months after application. Do not rotate to broadleaf crops grown for seed (excluding Brassica species), chickpeas, lentils, peas, or potatoes (including potatoes grown for seed) for at least 18 months after treatment. Carefully follow label rotation restrictions with other crops.

Site of action (both) Group 4: Synthetic auxin

Chemical family (both) Pyridine

clopyralid + MCPA (Curtail M or Commando M)

Rate 0.083 to 0.111 lb ae/a clopyralid + 0.438 to 0.583 lb ae/a 2,4-D (1.75 to 2.33 pt/a Curtail M or Commando M 2.77SC)

Time Apply in spring to actively growing weeds after grain has three unfolded leaves on the main stem, up to jointing stage (first node on stem detectable). Do not apply after the boot stage.

Remarks Apply before weeds exceed 3 inches in height or diameter. For Canada thistle, apply after most basal leaves emerge but before bud stage. Addition of an adjuvant is not usually necessary; if a surfactant is desired, use a nonionic surfactant (NIS) with at least 80% active ingredient, and do not exceed 0.5% v/v (4 pints/100 gal spray solution). Extreme growing conditions such as drought or near freezing temperatures prior to, at or following application may reduce weed control and increase risk of crop injury at all growth stages. Applications are rainfast within 6 hours after application. Restricted entry interval (REI) is 12 hours. Do not apply more than 2.3 pints/a per year or make more than one application per year.

Caution Do not apply if the barley is underseeded with a legume. Do not tank mix with 2,4-D or dicamba unless risk of crop injury is acceptable. Do not apply this product through any irrigation system. Curtail M and Commando M can persist in soil. Do not plant wheat, barley, oats, field corn, or grasses within 30 days of applying. Do not rotate to canola, flax or sugar beets within 5 months after application. Do not rotate to asparagus, Brassica species grown for seed, cole crops, mint, onions, popcorn, or sweet corn for 12 months after application. Do not rotate to alfalfa, lentils, dry beans, peas, potatoes (including potatoes grown for seed), broadleaf seed crops (excluding Brassica species), or safflower for at least 18 months after treatment, depending on annual precipitation. Carefully follow label rotation restrictions with other crops.

Site of action (both) Group 4: synthetic auxin

Chemical family (clopyralid) Pyridine; (MCPA) Phenoxy acetic acid

dicamba (Banvel, Clarity, or others)

Rate 0.06 to 0.125 lb ae/a (2 to 4 fl oz/a Clarity 4SC or Banvel 4SC)

Time Apply after weeds have emerged (2- to 3-leaf stage or less than 2 inches in diameter) but before spring barley exceeds the four-leaf stage, or before fall barley begins jointing.

Remarks In spring-seeded barley, do not exceed 3 fl oz/a; use 4 fl oz/a only on fall-seeded barley. Rainfall or irrigation occurring within 4 hours after postemergence application may reduce results. Restricted entry interval (REI) is 24 hours.

Caution Do not tankmix dicamba with 2,4-D in early season applications on spring barley. Do not apply this product through any irrigation system. To avoid injuring desirable crops, do not apply dicamba in the vicinity of sensitive species or if air temperature is expected to exceed 85°F. Do not harvest within 7 days after application.

Site of action Group 4: synthetic auxin

Chemical family Benzoic acid

florasulam + MCPA ester (Orion)

Rate 0.0045 lb ai/a florasulam + 0.31 lb ai/a MCPA (17 fl oz/a Orion 2.373EC)

Time Apply from three-leaf barley growth stage up to jointing stage. Apply when weeds are actively growing. A later application, when crop is between jointing and boot stages, may control weeds emerging later. However, do not apply unless the risk of injury is acceptable. Do not apply after the boot stage.

Remarks Only weeds that have emerged at the time of application will be controlled. An adjuvant may be added to optimize herbicidal activity under suboptimal conditions. Orion is rainfast within 4 hours after application. If foliage is wet at the time of application, control may be reduced. Extreme growing conditions such as drought or near-freezing temperatures before, during, or after application may reduce weed control and increase crop injury. Do not apply more than 17 fl oz Orion/a per growing season. Livestock may be grazed on treated crops 7 days following application. Do not apply within 60 days of barley harvest. Restricted entry interval (REI) is 12 hours.

Caution Do not apply this product through any irrigation system. Do not plant any type of corn for 3 months after application. Do not plant alfalfa, canola, chickpea, soybean, dry bean, pea (dry and succulent), flax, lentil, potato, safflower, sugar beet, or sunflower for 9 months after application.

Site of action (florasulam) Group 2: acetolactate synthase (ALS) inhibitor; (MCPA) Group 4: synthetic auxin

Chemical family (florasulam) Triazolopyrimidine; (MCPA) Phenoxy acetic acid

florasulam + halauxifen (Quelex)

Rate 0.0047 lbs ai/a florasulam + 0.0047 lb ae/a halauxifen (0.75 oz/a Quelex)

Time Apply Quelex in the spring or fall early postemergence to the main flush of actively growing weeds in the 2 to 4 leaf stage or less than 4 inches tall. Quelex may be used as a preplant burndown in the spring, summer, or fall when the majority of weed have emerged and are actively growing.

Remarks Do not tank mix any pesticide product containing glufosinate with Quelex. Restricted entry interval (REI) is 12 hours.

Caution Do not apply more than 0.75 oz Quelex/a per season. Preharvest interval is 60 days for grain, 21 days for forage, and 7 days for grazing.

Site of action (florasulam) Group 2: acetolactate synthesis (ALS) inhibitor: (halauxifen) Group 4: synthetic auxin.

Chemical family (florasulam) Triazolopyrimidine sulfonamide; (halauxifen) Arylpicolinate

fluroxypyr (Starane Ultra, Comet)

Rate 0.105 to 0.25 lb ae/a (0.3 to 0.7 pint/a Starane Ultra 2.8EC and 0.5 to 1.33 pints/a Comet 1.5EC)

Time Apply to actively growing barley from two-leaf stage up to and including flag leaf emergence. Apply to actively growing weeds up to 8 inches tall or vining.

Remarks May be tank mixed with other broadleaf weed herbicides registered for use in barley. Follow the most restrictive label statement of the tank-mix products used. Use 0.25 lb ae/a for volunteer potato control. Moisture on foliage at application may decrease control. Applications are rainfast after 1 hour. Optimum temperature range for herbicidal activity is 55°F to 75°F. Frost up to 3 days before, or 3 days after, may reduce weed control and crop tolerance. Restricted entry interval (REI) is 24 hours.

Caution Do not apply more than once per growing season. Do not use if barley is underseeded with a legume. Do not plant any crop other than wheat, barley, or oats for 120 days after application. Do not let livestock graze treated areas. Preharvest intervals are 7 days for forage, 14 days for hay, and 40 days for grain or straw.

Site of action Group 4: synthetic auxin

Chemical family Pyridine

fluroxypyr + bromoxynil (Starane NXT)

Rate 0.06 to 0.125 lb ai/a fluroxypyr + 0.25 to 0.5 lb ai/a bromoxynil + (14 to 27.4 fl oz/a Starane NXT 2.91EC)

Time Apply to barley from three-leaf stage through flag leaf emergence. Apply to weeds up to 4 or 8 inches tall, depending on rate.

Remarks Compatible with all grass herbicides. Only weeds emerged at time of application will be controlled. Any crop may be planted 120 days after application. Applications are rainfast within 1 hour after application. Extreme growing conditions such as drought or near-freezing temperatures before, during, or after application may reduce weed control and increase crop injury. Restricted entry interval (REI) is 24 hours.

Caution Do not apply within 45 days of grain, hay or straw harvest and do not allow livestock to graze treated areas within 45 days after application.

Site of action (fluroxypyr) Group 4: synthetic auxin; (bromoxynil) Group 6: photosystem II inhibitor

Chemical family (fluroxypyr) Pyridine; (bromoxynil) Nitrile

fluroxypyr + florasulam (Starane Flex)

Rate 0.878 lb ae/a fluroxypyr + 0.0044 lb ai/a florasulam (13.5 fl oz/a Starane Flex 0.875 EC)

Time Apply to actively growing barley from the three-leaf growth stage up to flag leaf emergence. Apply when susceptible weeds are less than 4 inches tall and are actively growing.

Remarks Only weeds that have emerged at the time of application will be controlled. Weeds hardened off by cold weather or drought stress may not be adequately controlled or suppressed, and regrowth may occur. Generally, this product does not require the use of an adjuvant to achieve satisfactory weed control. An adjuvant may be added when applications are made under conditions of cool temperature, low relative humidity or drought, or when a tank mix partner recommends the use of an adjuvant. Livestock may be grazed on treated crops 7 days following application. Applications are rainfast within 4 hours after application. Restricted entry interval (REI) is 24 hours.

Caution Do not apply to crops underseeded with legumes. Do not apply this product through any type of irrigation system. This product has potential to leach. Do not apply excessive irrigation. Do not apply within 60 days of harvest. Do not apply more than 13.5 fl oz/a of Starane Flex per growing season. Extreme growing conditions, such as drought or near freezing temperatures prior to, at, or following time of application, may reduce weed control and increase the risk of crop injury at all stages of growth.

Site of action (fluroxypyr) Group 4: synthetic auxin; (florasulam) Group 2: acetolactate synthase (ALS) inhibitor

Chemical family (fluroxypyr) Pyrimidine; (florasulam) Triazolopyrimidine

fluroxypyr + thifensulfuron-methyl (Sentrallas)

Rate 1.12 to 2.24 oz ae/a fluroxypyr + 0.22 to 0.44 oz ai/a thifensulfuron-methyl (7 to 14 fl oz/a Sentrallas 24.9% OD)

Time Apply to actively growing barley after the crop is in the 2-leaf stage, but before the flag leaf is visible. Annual broadleaf weeds must be past the cotyledon stage and actively growing.

Remarks Tank-mix compatibility with many commonly used broadleaf and grass herbicides, fungicides, insecticides, liquid fertilizers, and spray adjuvants (see current product label for specific restrictions, precautions, and details). For best results, apply to young, actively growing weeds that are less than 4 inches in height or diameter. To reduce potential of crop injury, tank mix with 2, 4-D ester and apply after the crop is in the tillering stage of growth. Thorough coverage of target weeds is essential. Rain-fast 1 hour after application. Restricted entry interval (REI) is 24 hours.

Caution Do not exceed 14 fl oz/a when making a single application or 17.8 fl oz/a for the entire season. Do not apply through any type of irrigation system, to crops underseeded to legumes or grasses as injury to forage may result, and tank mix with Malathion because crop injury may result. Do not graze or harvest treated forage within 7 days of application, and do not harvest hay within 30 days of application or grain within 45 days of application.

Site of action Group 4: synthetic auxins (fluroxypyr) Group 2: acetolactate synthase (ALS) inhibitor

Chemical family (fluroxypyr) Pyridine carboxylic acid; (thifensulfuron-methyl) Sulfonylurea

fluroxypyr + thifensulfuron-methyl + metsulfuron-methyl (Travallas)

Rate 1.12 to 1.92 oz ae/a fluroxypyr + 0.22 to 0.38 oz ai/a thifensulfuron-methyl + 0.022 to 0.038 oz ai/a metsulfuron-methyl (7 to 12 fl oz/a [10 to 12 fl oz/a in the states of Idaho, Oregon, and Washington only] Travallas 25.2% OD)

Time Apply to actively growing barley after the crop is in the 2-leaf stage, but before the flag leaf is visible. Annual broadleaf weeds must be past the cotyledon stage and actively growing.

Remarks Tank-mix compatibility with many commonly used broadleaf and grass herbicides, fungicides, insecticides, liquid fertilizers, and spray adjuvants (see current product label for specific restrictions, precautions, and details). Use of spray adjuvants are recommended and ammonium nitrogen fertilizer may be used. For best results, apply to young, actively growing weeds that are less than 4 inches in height or diameter. Thorough coverage of target weeds is essential. Rain-fast 1 hour after application. Restricted entry interval (REI) is 24 hours.

Caution Do not exceed 12 fl oz/a (Idaho, Oregon, and Washington only). Do not make more than one application per season. Should not be used on soils having a pH above 7.9, because extended soil residual activity could extend crop rotation intervals beyond normal. See label for crop rotation intervals. Do not apply through any type of irrigation system, to crops underseeded to legumes or grasses as injury to forage may result, and tank-mix with malathion because crop injury may result. Do not graze or harvest treated forage within 7 days of application, and do not harvest hay within 30 days of application or grain within 45 days of application.

Site of action Group 4: synthetic auxins (fluroxypyr) Group 2: acetolactate synthase (ALS) inhibitor

Chemical family (fluroxypyr) Pyridine carboxylic acid; (thifensulfuron-methyl) & (metsulfuron-methyl) Sulfonylurea

MCPA (several trade names, MCPA Amine or MCPA Ester)

Rate 0.25 to 0.5 lb ae/a

Time The 0.25 lb rate can be applied after the grain has four leaves. Higher rates can be applied after the grain is fully tillered, but before jointing.

Remarks Grazing interval varies by label from 7 to 14 days. Individual MCPA labels may vary slightly on use rates and grazing interval. Check label to ensure proper rate and application timing. Restricted entry interval (REI) is 12 hours for the MCPA ester formulation and 48 hours for the MCPA amine formulation.

Caution Do not let MCPA drift off target. Do not apply more than 0.75 lb ae/a per year. Do not apply this product through any type of irrigation system. Do not forage or graze meat animals on treated areas within 7 days of slaughter. Do not forage or graze dairy animals on treated areas within 7 days after treatment.

Site of action Group 4: synthetic auxin

Chemical family Phenoxy acetic acid

MCPA + fluroxypyr + clopyralid (Hat Trick or Weld)

Rate 0.34 to 0.45 lb ae/a MCPA + 0.096 to 0.128 lb ae/a fluroxypyr + 0.0946 to 0.128 lb ae/a clopyralid (1.5 to 2 pints/a Hat Trick 2.82EC) for Hat Trick herbicide or 0.22 to 0.44 lb ae/a MCPA + 0.08 to 0.16 lb ae/a fluroxypyr + 0.0625 to 0.125 lb ae/a clopyralid (1 to 2 pints/a Weld 2.89EC) for Weld herbicide.

Time Apply to actively growing wheat from the 3-leaf stage until wheat flag leaf emergence for Hat Trick herbicide and up to and including flag leaf emergence for Weld herbicide. Be sure to apply to actively growing weeds, but before weeds are 4 inches tall or vining. Consult the label for information about specific weeds.

Remarks This product is rainfast within 6 hours after application. If foliage is wet at the time of application, control may be decreased. Extreme growing conditions such as drought or near freezing temperatures prior to, at, or following application may reduce weed control and increase the risk of crop injury at all growth stages. The addition of an adjuvant may optimize herbicidal activity when applications are made at lower use rates/carrier volumes, under conditions of cool temperature, low humidity or drought, or to small, heavily pubescent kochia. Best control is achieved when kochia is a least 1 inch tall and not taller than 4 inches. Only weeds that have emerged at time of application will be controlled. This product is rainfast within 6 hours after application. Restricted entry interval (REI) is 12 hours.

Caution Do not apply if the spring wheat is underseeded with a legume. Do not apply this product through any type of irrigation system. Do not allow livestock to graze treated areas or harvest treated forage within 7 days of application. Do not harvest of grain and straw within 40 days of application. Refer to label for specific crop rotation restrictions. Do not apply more than 3.0 pints/a per year. Do not apply this product through any irrigation system.

Site of action Group 4: synthetic auxin

Chemical family (MCPA) Phenoxy acetic acid, (fluroxypyr and clopyralid) Pyridine

etsulfuron (Ally XP) + another broadleaf herbicide with a different site of action

Rate 0.06 oz ai/a (0.1 oz/a Ally 60XP)

Time In non-irrigated barley apply postemergence after barley has two leaves, but before boot stage; see label for postemergence application timing when using tank mixes. In irrigated barley, apply after crop begins tillering, but before boot stage.

Remarks Metsulfuron controls a wide range of broadleaf weeds and inhibits Canada thistle. For best results, add a surfactant of at least 60% active ingredient at 0.0.0625 to 0.5% v/v (0.25 to 2 quarts/100 gal spray solution). Apply to difficult-to-control weeds while they are actively growing and not more than 2 inches tall or wide. To broaden the spectrum of control, tank mix with a suitable registered herbicide such as 2,4-D, bromoxynil, dicamba, fluroxypyr or MCPA. Time application to coincide with recommendation for specific tank-mix partner. The first post-treatment irrigation should be delayed at 3 days after herbicide application and should not exceed 1 inch of water. May be tank-mixed with 2,4-D or glyphosate and applied as a harvest aid. Restricted entry interval (REI) is 4 hours.

Caution Do not harvest sooner than 10 days after application. Do not use on soils above pH 7.9. Metsulfuron can persist in soil. Carefully follow label instructions on crop rotations. Many crops cannot be planted within 2 years or longer after applying. See label for cautions on tank-mix or sequential applications with organophosphate insecticides, and applications just before or during adverse conditions such as cold or freezing weather. Do not apply this product through any type of irrigation system.

Site of action Group 2: acetolactate synthase (ALS) inhibitor

Chemical family Sulfonylurea

metsulfuron + thifensulfuron + tribenuron (Ally Extra SG) + another broadleaf herbicide with a different site of action

Rate 0.155 to 0.259 oz ai/a (0.3 to 0.5 oz/a Ally Extra 51.8SG)

Time Apply after the crop is in the 2-leaf stage, but before the flag leaf is visible Apply to young, actively growing weeds in the spring summer or fall.

Remarks Ally Extra may be tank-mixed with other suitable registered herbicides. Use the 0.5 oz/a rate for heavy weed infestations. For best results use 2, 4-D or MCPA at 1/8 to 3/8 lb ai/a. Include a nonionic surfactant (NIS) having at least 60% active ingredient at 0.0625 to 0.5% v/v (0.5 to 4 pints/100 gal of spray solution). Rainfall or snowfall within the first 6 hours after application may result in reduced weed control. Restricted entry interval (REI) is 12 hours.

Caution Do not harvest sooner than 45 days after application. Do not use on soils above pH 7.9. Ally Extra can persist in soil. Carefully follow label instructions on crop rotations. Many crops cannot be planted within 2 years or longer after applying. See label for cautions on tank-mix or sequential applications with organophosphate insecticides, and applications just before or during adverse conditions such as cold or freezing weather. Do not apply this product through any type of irrigation system.

Site of action Group 2: acetolactate synthase (ALS) inhibitor

Chemical family Sulfonylurea

prosulfuron (Peak) + another broadleaf herbicide with a different site of action

Rate 0.22 to 0.289 oz ai/a (0.38 to 0.5 oz/a Peak 57WDG)

Time Apply postemergence from crop emergence to before the second node is detectable in the jointing growth stage; see label for postemergence application timing when using tank-mixes.

Remarks Results are best when weeds are young and actively growing. If tank-mixing with another broadleaf herbicide, prosulfuron may be applied at 0.25 to 0.5 oz/a. Apply with nonionic surfactant (NIS) of at least 80% active ingredient at 1 to 2 qt/100 gal spray solution, or a crop oil concentrate (COC) of at least 12% emulsifier at 1 to 4 pints/a. Rainfall or overhead irrigation within 4 hours after application my reduce weed control. Do not apply if cold, wet conditions that stress barley are expected within 1 week after application. Restricted entry interval (REI) is 12 hours.

Caution Carefully follow crop rotation instructions on label. Do not let spray drift to non-target crops. See label for cautions on tank-mix or sequential applications with organophosphate insecticides, and applications just before or during adverse conditions such as freezing weather. Do not apply this product through any type of irrigation system.

Site of action Group 2: acetolactate synthase (ALS) inhibitor

Chemical family Sulfonylurea

saflufenacil (Sharpen)

Rate 0.022 to 0.045 lb ai/a (1.0 to 2.0 fl oz/a Sharpen 2.85SC)

Time Apply for burndown or residual (use 2 fl oz) control of weeds early preplant to preemergence. Sequential applications may be made as needed prior to barley emergence.

Remarks Residual preemergence applications of Sharpen must be activated by at least 0.5 inch of rainfall or sprinkler irrigation prior to weed seedling emergence. Do not apply more than a maximum cumulative amount of 4.0 oz/a Sharpen per cropping season. An adjuvant system is required for optimum broadleaf burndown activity. This includes methylated seed oil (MSO) at 1% v/v (1 gal/100 gal spray solution) plus ammonium sulfate (AMS) at 1 to 2% v/v (8.5 to 17 lb/100 gal spray solution) or urea ammonium nitrate at 1.25 to 2.5% v/v (1.25 to 2.5 gal/100 gal spray solution). Do not use nonionic surfactant (NIS) as a substitute for MSO. Performance will depend on amount of rainfall for activation, soil texture, and broadleaf species population. Rainfast with 1 hour of application. Restricted entry interval (REI) is 12 hours.

Caution Do not apply to barely grown for malting purposes. Do not apply following barley emergence because crop injury will occur. Do not feed or graze for 30 days after application.

Site of action Group 14 Protoporphyrinogen IX oxidase (PPO) inhibitor

Chemical family Pyrimidinedione

thifensulfuron (Harmony SG) + another broadleaf herbicide with a different site of action

Rate 0.225 to 0.045 oz ai/a (0.45 to 0.9 oz/a Harmony 50 SG)

Time Apply after barley is in the 2-leaf stage but before the flag leaf is visible; see label for postemergence application timing when using tank-mixes.

Remarks For best results, add a surfactant with at least 60% nonionic surfactant (NIS) at 0.5 to 4 pt/100 gal of spray solution. Crop oil concentrate (COC) or modified seed oil (MSO) may be used at 1 gal/100 gal spray solution or 2 gal/100 gal spray solution under arid conditions. Apply when weeds are young and actively growing, temperature is 60°F or higher, and moisture is adequate before, during, and immediately after treatment. See most recent grass herbicide label for tank-mix restrictions. Soybeans, field corn, safflower, wheat, barley, oats, and triticale may be planted anytime after application; any other crops may be planted 45 days after application. Sequential treatments may be made provided total amount applied to crop does not exceed 1.5 oz/a. Weed control may be reduced if rainfall or snowfall occurs soon after application. Restricted entry interval (REI) is 4 hours.

Caution Do not let spray drift to adjacent crops or land. Do not apply during air temperature inversions. Thoroughly clean mixing and spraying equipment immediately after spraying. Do not harvest grain within 45 days after application. Do not apply this product through any type of irrigation system.

Site of action Group 2: acetolactate synthase (ALS) inhibitor

Chemical family Sulfonylurea

thifensulfuron + tribenuron (2:1 formulations) + another broadleaf herbicide with a different site of action

Rate 0.15 to 0.3 oz ai/a thifensulfuron + 0.075 to 0.15 oz ai/a tribenuron

Time Apply after barley is in two-leaf stage but before flag leaf is visible.

Remarks This includes Harmony Extra SG, Harmony Extra XP, TNT Broadleaf and other generics. Be aware that, although they contain the same ratio of thifensulfuron to tribenuron, these products are formulated differently. Be sure to use the correct amount of herbicide. For best results, add a surfactant of at least 80% active ingredient at 0.25 to 0.5% v/v (1 to 2 qt/100 gal spray solution). In addition to a spray adjuvant, an ammonium nitrogen fertilizer may be used. Apply when weeds are young and actively growing, and when conditions include temperatures of 60°F or higher and adequate soil moisture before, during, and immediately after treatment. See most recent grass herbicide label for tank-mix restrictions. Weed control may be reduced if rainfall or snowfall occurs soon after application. Restricted entry interval (REI) is 12 hours.

Caution Do not let this herbicide drift off target. Do not apply during an air temperature inversion. Immediately after spraying, thoroughly clean mixing and spray equipment. Wheat and barley may be planted any time after application. Sugar beets, winter rape, and canola may be planted 60 days after application. All other crops may be planted 45 days after application. Do not harvest grain within 45 days after application. Do not apply this product through any type of irrigation system.

Site of action (both) Group 2: acetolactate synthase (ALS) inhibitor

Chemical family (both) Sulfonylurea

thifensulfuron + tribenuron (1:1 formulations, Affinity BroadSpec and Edition BroadSpec) + another broadleaf herbicide with a different site of action

Rate 0.1 to 0.25 oz ai/a thifensulfuron + 0.1 to 0.25 oz ai/a tribenuron (0.4 to 1 oz/a Affinity BroadSpec and Edition BroadSpec 50SG)

Time Apply after barley is in 2-leaf stage but before flag leaf is visible; see label for postemergence application timing when using tank-mixes.

Remarks Affinity BroadSpec and Edition BroadSpec are 1:1 formulations of thifensulfuron and tribenuron. Must be tank-mixed when applying 0.4 to 0.6 oz/a. Add a nonionic surfactant (NIS) at 0.0625 to 0.5% v/v (0.25 to 2 quarts/100 gal spray solution). Use with another broadleaf herbicide with a different site of action. Results are best when weeds are young and actively growing, temperature is 60°F or higher, and soil moisture is adequate before, during, and immediately after treatment. See most recent grass herbicide label for tank-mix restrictions. Weed control may be reduced if rainfall or snowfall occurs soon after application. Restricted entry interval (REI) is 12 hours.

Caution Do not exceed 1.0 oz/a per crop season. Do not let this herbicide drift off target. Do not plant any crop except wheat, barley or triticale for 45 days after application. Sugar beets, winter rape, and canola cannot be planted until 60 days after application. Do not harvest grain within 45 days after application.

Site of action (both) Group 2: acetolactate synthase (ALS) inhibitor

Chemical family (both) Sulfonylurea

thifensulfuron + tribenuron (4:1 formulations, Affinity TankMix and Edition TankMix) + another broadleaf herbicide with a different site of action

Rate 0.015 to 0.025 lb ai/a thifensulfuron + 0.0038 to 0.0063 lb ai/a tribenuron (0.6 to 1 oz/a Affinity TankMix and Edition TankMix 50SG)

Time Apply after barley is in 2-leaf stage, but before flag leaf is visible; see label for postemergence application timing when using tank mixes.

Remarks Affinity TankMix and Edition TankMix are 4:1 formulations of thifensulfuron and tribenuron. Add a nonionic surfactant (NIS) at 0.25 to 0.5% v/v (1 to 2 qt/100 gal spray solution). Use with another broadleaf herbicide with a different site of action. Results are best when weeds are young and actively growing, temperature is 60°F or higher, and soil moisture is adequate before, during, and immediately after treatment. See most recent grass herbicide label for tank-mix restrictions. Sequential treatments may be made provided total amount applied to crop does not exceed 1.8 oz/a per year. Weed control may be reduced if rainfall or snowfall occurs soon after application. Restricted entry interval (REI) is 12 hours.

Caution Do not let this herbicide drift off target. Wheat, barley, and triticale may be planted any time after application. Sugar beets, winter rape, and canola may be planted 60 days after application. All other crops may be planted 45 days after application. Do not harvest grain within 45 days after application.

Site of action (both) Group 2: acetolactate synthase (ALS) inhibitor

Chemical family (both) Sulfonylurea

thifensulfuron + tribenuron + metsulfuron (Ally Extra SG) + another broadleaf herbicide with a different site of action

Rate 0.005 to 0.0086 lb ai/a thifensulfuron + 0.0025 to 0.0042 lb ai/a tribenuron + 0.002 to 0.0034 metsulfuron lb ai/a (0.3 to 0.5 oz/a Ally Extra 48.2 SG)

Time Apply after the crop is in the 2-leaf stage, but before the flag leaf is visible; see label for postemergence application timing when using tank mixes.

Remarks Ally Extra may be tank mixed with other suitable registered herbicides. Include a nonionic surfactant (NIS) having at least 80% active ingredient at 0.125 to 0.25% v/v (0.5 to 1 qt/100 gal of spray solution). Rainfall or snowfall within the first 6 hours after application may result in reduced weed control. Restricted entry interval (REI) is 12 hours.

Caution Do not use on soils above pH 7.9. Ally Extra can persist in soil. Carefully follow label instructions on crop rotations. Many crops cannot be planted within 2 years or longer after applying. See label for cautions on tank-mix or sequential applications with organophosphate insecticides, and applications just before or during adverse conditions such as cold or freezing weather.

Site of action Group 2: acetolactate synthase (ALS) inhibitor

Chemical family Sulfonylurea

triasulfuron (Amber) + another broadleaf herbicide with a different site of action

Rate 0.013 to 0.026 lb ai/a (0.28 to 0.47 oz/a Amber 75DF)

Time Apply pre-boot at any growth stage; see label for postemergence application timing when using tank mixes.

Remarks Control is best when weeds are actively growing and 2 inches or less in height or diameter. Add a surfactant of at least 80% active ingredient at 0.25% to 0.5% v/v (1 to 2 quarts/100 gal spray solution). Use 0.35 to 0.47 oz/a if the weeds are at or above the maximum height. Restricted entry interval (REI) is 4 hours.

Caution Triasulfuron can persist in soil. Follow label instructions when rotating to barley. At these rates, wheat can be seeded immediately after application; all other crops require a field bioassay. Do not allow spray to drift to non-target crops. Do not apply when barley is stressed due to temperature extremes, excessive or too little moisture, disease, insects, or when extremes in temperature or rainfall are expected within one week of application. See label for use restrictions in sections of Washington and Oregon west of the Cascades. Do not apply as tankmix or sequentially with malathion. Do not exceed 0.56 oz/a in one crop year. Do not apply this product through any type of irrigation system.

Site of action Group 2: acetolactate synthase (ALS) inhibitor

Chemical family Sulfonylurea

triasulfuron + dicamba (Rave)

Rate 0.022 triasulfuron + 0.138 lb ai/a dicamba (4 oz/a Rave 63.8 WDG)

Time Apply after emergence up to 4-leaf stage in spring barley, or up to jointing stage in winter barley.

Remarks Maximum use rate is 2 oz/a Rave in spring barley and 4 oz/a in winter barley. Include nonionic surfactant (NIS) at 0.125% to 0.25% v/v (0.5 to 1 quart/100 gal spray solution) when water is the carrier. Rave controls many broadleaf weeds and may be tank-mixed with Aim, Ally, Buctril, Bronate, MCPA, and 2,4-D. Rain within 4 hours of application may reduce herbicide effectiveness. Restricted entry interval (REI) is 24 hours.

Caution Washington growers must abide by all sulfonylurea aerial application rules. Do not let spray drift to non-target crops or desirable plants. Preharvest interval is 37 days for hay or grain. Do not apply within 4 hours of rain or sprinkler irrigation. Do not apply this product through any type of irrigation system.

Site of action (triasulfuron) Group 2: acetolactate synthase (ALS) inhibitor; (dicamba) Group 4: synthetic auxin

Chemical family (triasulfuron) Sulfonylurea; (dicamba) Benzoic acid

tribenuron (Express SG) + another broadleaf herbicide with a different site of action

Rate 0.0081 to 0.0156 lb ai/a (0.25 to 0.5 oz/a Express 50 SG)

Time Apply after barley is in 2-leaf stage but before flag leaf is visible; see label for postemergence application timing when using tank mixes.

Remarks Results are best when weeds are young and actively growing, temperature is 60°F or higher, and soil moisture is adequate before, during, and immediately after treatment. Controls only weeds that have emerged; therefore, apply when all or most of the weed have emerged. Can be tank mixed with 2, 4-D, MCP, Bromoxynil and others. See label for full list. Include a surfactant at 0.06 to 0.5% v/v (0.25 to 2 quarts/100 gal spray solution) with at least 60% nonionic surfactant (NIS). Crop oil concentrate (COC) or modified seed oil (MSO) may be used at 1% v/v (1 gal/100 gal spray solution) or under arid conditions use 2% v/v (2 gal/100 gal spray solution). See most recent grass herbicide label for tank-mix restrictions. Restricted entry interval (REI) is 12 hours.

Caution Do not let spray drift to adjacent crops or land. Do not apply during an air temperature inversion. Thoroughly clean mixing and spraying equipment immediately after spraying. Do not apply to barley underseeded with another crop. Wheat and barley may be planted any time after application. Oats may be replanted 1 day later in soils with pH < 7.9. If pH is > 7.9, wait 7 days. Do not harvest grain within 45 days after application.

Site of action Group 2: acetolactate synthase (ALS) inhibitor

Chemical family Sulfonylurea