Annual and Perennial Grasses

clethodim (Select and other trade names)

Rate 0.068 to 0.125 lb ai/a

Time Apply to actively growing annual or perennial grasses.

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.

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. Preharvest interval is 60 days. Do not exceed 0.25 lb ai/a per season.

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

Chemical family Cyclohexanedione

quizalofop (Assure II and other trade names)

Rate 0.034 to 0.0825 lb ai/a (5 to 12 oz/a Assure II)

Time Apply to actively growing grasses 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. Quizalofop will not control annual bluegrass or fine fescues. Control may be reduced on grasses stressed from lack of moisture, cold weather, herbicide injury, and insect injury or disease.

Caution Do not exceed 24 oz/a product per year.

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

Chemical family Cyclohexanedione

sethoxydim (Poast and other trade names)

Rate 0.19 to 0.28 lb ai/a (1 to 1.5 pints/a Poast)

Time Apply to actively growing grasses.

Remarks Control may be erratic on grasses stressed by lack of vigor, drought, or high temperature. Fine fescues and annual bluegrass are tolerant to sethoxydim; quackgrass is suppressed.

Caution Do not exceed 4 pints/a product per year. Preharvest interval is 75 days. Do not mix or apply with any other pesticide, additive, or fertilizer except as label directs.

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

Chemical family Cyclohexanedione