fluazifop (Fusilade DX)
Rate 0.25 to 0.375 lb ai/A (16 to 24 fl oz/A)
Time Apply to actively growing grasses in early spring, following ample rain, as a directed spray with 0.25% nonionic surfactant.
Remarks Identify grasses and adjust rates depending on susceptibility and stage of weed growth according to label instructions. Results often are erratic on grasses stressed from lack of vigor, drought, high temperature, or low fertility. More mature grasses and quackgrass can be controlled but may require two applications. Annual bluegrass and all fine fescues resist treatment. Inhibits fatty acid production, cell membranes, and new growth.
Caution Do not tank mix with other pesticides or apply within 5 days of other pesticide treatments. Grazing is prohibited.
Site of action Group 1: acetyl CoA carboxylase (ACCase) inhibitor
Chemical family Aryloxyphenoxy propionate
sethoxydim (Segment and others)
Rate 0.28 to 0.47 lb ai/A (2.25 to 3.75 pints/A Segment), depending on grass species and height
Time Apply at optimum growth stage of grass weed listed on the label.
Remarks Identify susceptible grasses. Control often is erratic on grasses stunted or stressed from drought, high temperatures, or low fertility. Resistant grasses include annual bluegrass and all fine fescues, whereas quackgrass can be suppressed. Inhibits fatty acid production, cell membranes, and new growth.
Caution Do not tank mix with other pesticides for use on conifer seedlings less than 10 months old or injury may occur.
Site of action Group 1: acetyl CoA carboxylase (ACCase) inhibitor
Chemical family Cyclohexanedione