clethodim (Select 2EC, Select Max, Section Three, Intensity or Intensity One)
Rate Select, Select 2EC, or Intensity: use 0.094 to 0.125 lb ai/A (6 to 8 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). Section Three: use 0.094 to 0.24 lb ai/A (4 to 10.5 fl oz/A product).
Time Apply to actively growing annual or perennial grasses at growth stage listed on label.
Remarks For grass control only. Refer to 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. Clethodim is most effective on actively growing grasses before they reach maximum size indicated on label. For best results in irrigated alfalfa, apply within 2 to 4 days after irrigation. Use at least 8 oz/A of Select or 17 oz/A of Select Max or 6.67 fl oz/A of Section Three to control annual bluegrass.
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 or 64 fl oz/A of Select Max or 21.33 fl oz/A Section Three.
Site of action Group 1: acetyl CoA carboxylase (ACCase) inhibitor
Chemical family Cyclohexanedione
fluazifop (Fusilade DX)
Rate 0.125 to 0.188 lb ai/A (0.5 to 0.75 pints/A product)
Time Apply to actively growing grasses, particularly quackgrass, when susceptible grasses are in labeled growth stage.
Remarks Controls grasses only. Special local needs labels OR-040006, ID-950006, and WA-040007. Add a crop oil concentrate at 0.5% to 1% concentration, or a nonionic surfactant at 0.25% to 0.5% concentration. Results often are erratic on grasses stressed from lack of vigor, drought, high temperatures, low fertility, or other factors. More mature grasses and quackgrass can be controlled, but may require two applications. Will not control annual bluegrass or any of the fine fescues. Fluazifop is often weak on foxtails and perennial bluegrass.
Caution Do not feed treated forage to livestock. No part of the treated field, including seed, seed screenings, hay, forage, or stubble may be used for human or animal feed.
Site of action Group 1: acetyl CoA carboxylase (ACCase) inhibitor
Chemical family Aryloxyphenoxypropionate
quizalofop (Assure II)
Rate 0.034 to 0.0825 lb ai/A (5 to 12 oz/A Assure II)
Time Apply to actively growing annual or perennial grasses at growth stage listed on label.
Remarks See label for specific herbicide rates, weed species, and weed size. Under arid conditions, use higher rate for the target grass weed. Always include a nonphytotoxic crop oil concentrate at 1% v/v or a nonionic surfactant at 0.25% v/v. Crop oil concentrate is preferred in arid areas. Will not control annual bluegrass or fine fescue. Control may be reduced on grasses stressed from lack of moisture, cold weather, herbicide injury, and insect injury or disease.
Caution Do not apply within 14 days of anticipated bloom. Do not use any part of crop (seed, sprouts, screenings, hay, forage, etc.) for animal or human consumption. Do not exceed two applications, or 0.17 lb ai/A (25 oz/A product) per season.
Site of action Group 1: acetyl CoA carboxylase (ACCase) inhibitor
Chemical family Aryloxyphenoxypropionate
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 growth stage listed on label.
Remarks Controls grasses only. See label for specific herbicide rates and weed species and 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, but before they reach the maximum size indicated on the label. Larger, more mature grasses can be controlled, but two applications may be required. Will not control annual bluegrass or any of the fine fescues.
Caution Control often is erratic on grasses 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 exceed 0.94 lb ai/A in one season.
Site of action Group 1: acetyl CoA carboxylase (ACCase) inhibitor
Chemical family Cyclohexanedione