Quackgrass, Volunteer Cereals, and Annual Grasses in New or Established Stands

clethodim (Select, Select 2EC, Select Max, Section Three, Intensity, or Intensity One)

Rate Select 2EC, or Intensity: use 0.094 to 0.125 lb ai/a (6 to 8 fl oz/a product). Section Three: use 0.094 to 0.24 lb ai/a (4 to 10.5 fl oz/a product). Select Max or Intensity One: use 0.07 to 0.24 lb ai/a (9 to 32 fl oz/a product).

Time Apply to actively growing annual or perennial grasses at stage of grass growth indicated on label.

Remarks For grass control only. Weak on quackgrass. See label for specific weed species and weed size. Always add a crop oil concentrate containing at least 15% emulsifier at 1% v/v in the finished spray volume. Adding ammonium sulfate has improved control of difficult-to-control grasses. Clethodim is most effective on actively growing grasses before they reach the maximum size indicated on label. Use the higher rate under heavy grass pressure and/or when annual bluegrass is more mature.

Caution Control may be erratic if grasses are stressed by drought, temperature extremes, insect damage, herbicide injury, or other factors, or if grasses are larger than indicated on label. Do not apply if rain is expected within 1 hour after application. Do not apply within 15 days of grazing, feeding, or harvesting for forage or hay. Do not exceed 32 fl oz/a of Select 2EC or 64 fl oz of Select Max or 21.33 fl oz/a Section Three per season.

Site of action Group 1: acetyl CoA carboxylase (ACCase) inhibitor

Chemical family Cyclohexanedione

pronamide (Kerb)

Rate 0.25 to 2 lb ai/a (1 to 4 lb/a 50-W; 1.2 to 4.8 pints/a SC)

Time Apply October through early December.

Remarks The low rates are for grass suppression only. Herbicidal activity is optimal when applied under cool conditions (55°F or cooler) and followed by rain or overhead irrigation. Use higher rates for perennial grass control. On fields to be treated, remove residue by burning or tilling into the soil.

Caution A restricted-use herbicide. Apply on new plantings only after alfalfa reaches the first trifoliate leaf stage. Do not apply preplant, preemergence, or in the seed-leaf stage. Do not graze treated fields or feed clippings or crop residue to livestock within 25 days of applying (if less than 1.5 lb ai/a) or within 45 days (if 1.5 to 2 lb ai/a).

Site of action Group 3: microtubule assembly inhibitor

Chemical family Benzamide

sethoxydim (Poast or Poast Plus)

Rate 0.19 to 0.47 lb ai/a (1 to 2.5 pints/a Poast)

Time Apply to actively growing annual or perennial grasses at stage of grass growth indicated by the label.

Remarks Refer to label for specific herbicide rates, weed species, and weed size. Always add a nonphytotoxic oil concentrate to the spray tank at 2 pints/a. Sethoxydim is most effective on actively growing grasses before they have been cut and before they reach the maximum size indicated on label. Larger, more mature grasses can be controlled, but two applications may be required. Sethoxydim will not control annual bluegrass or any of the fine fescues.

Caution Control often is erratic if grasses are stressed by drought, temperature extremes, insect damage, herbicide injury, or other factors. Do not apply if rain is expected within 1 hour after application. Do not apply within 7 days of feeding, grazing, or harvesting for green chop or silage, or within 14 days of harvesting hay. Do not exceed 0.94 lb ai/a in one season.

Site of action Group 1: acetyl CoA carboxylase (ACCase) inhibitor

Chemical family Cyclohexanedione