Annual Grass and Perennial Grasses

Postemergence

clethodim (Select, Select Max and several other trade names)

Dry beans only

Rate 0.094 to 0.25 lb ai/a (6 to 16 fl oz/a Select 2EC) or 0.068 to 0.25 lb ai/a (9 to 32 fl oz/a Select Max 0.97EC)

Time Apply to actively growing grasses 1 to 8 inches tall (generally three-leaf to tillering).

Remarks Apply when the first grass-weed species in a mixed grass-weed population reaches the recommended growth stage for treatment. Be aware that clethodim is formulated as 0.97, 2, and 3 lb ai/gal; be sure to use the correct amount of herbicide. In arid regions where irrigation is used to supplement limited rainfall, clethodim should be applied within 7 days after irrigation. In general, two applications of clethodim will control perennial grasses more effectively than a single application. Make the second application to actively growing grass 2 to 3 weeks after emergence of new growth. Cultivation of treated grasses 7 days prior to or within 7 days after application may reduce weed control. With Select 2EC always use crop oil concentrate (COC) that contains a minimum of 80% oils and 15% emulsifier at 1 quart/a by ground or 1% v/v (1 gal/100 gal spray solution) by air. An additional 1 to 2 quarts/a liquid fertilizer (10-34-0, 28% N or 32% N) or 2.5 to 4 lb/a spray grade ammonium sulfate (AMS) fertilizer in addition to crop oil concentrate may be added to enhance quackgrass, wild oats, volunteer cereals and volunteer corn control with Select 2EC. When using Select Max, use a nonionic surfactant (NIS) at 0.25% v/v (1 quart/100 gal spray solution) or COC that contains a minimum of 80% oils and 15% emulsifier at 1 quart/a by ground or 1% v/v (1 gal/100 gal spray solution) by air. Do not apply if rain is expected within 1 hour of application. See label for tank mixing with broadleaf herbicides. Restricted entry interval (REI) is 24 hours.

Caution Do not apply more than 0.5 lb ai/a (64 fl oz/a) in a season or within 30 days of harvesting or cutting beans.

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

Chemical family Cyclohexanedione

fluazifop (Fusilade DX)

Rate 0.094 to 0.375 lb ai/a (6 to 24 fl oz/a Fusilade DX 2EC)

Time Apply when grasses do not exceed 4 leaves with most species. Refer to label for specific timing recommendations for each grass species.

Remarks Add crop oil concentrate at 0.5 to 1% v/v (0.5 to 1 gal/100 gal spray solution) or a nonionic surfactant at 0.25 to 0.5% v/v (1 to 2 quarts/100 gal spray solution) with each application. Do not apply if rain is expected within 1 hour of application. Fusilade DX is not registered for use in cowpeas. For quackgrass control, apply Fusilade sequentially at 16 to 24 fl oz/a when the grass is 6 to 10 inches tall and again up to 10 inch tall quackgrass at 12 to 24 fl oz/a. Maintain a minimum of 14 days between applications. Where irrigation is used as part of normal cropping practice, best results are obtained when fluazifop is applied within 7 days after irrigation. Fusilade is rainfast 1 hour after application. Restricted entry interval (REI) is 12 hours.

Caution Do not apply more than 48 fl oz/a per year or more than 24 fl oz/a per application. Do not harvest within 60 days of last application. Do not plant grass crops such as corn, sorghum, and cereals within 60 days of last application of fluazifop.

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

Chemical family Aryloxyphenoxy propionate

quizalofop P-ethyl (Assure II or Targa)

Dry beans only

Rate 0.034 to 0.08 lb ai/a (5 to 12 fl oz/a Assure II 0.88EC or Targa 0.88EC)

Time Postemergence to grasses. See label for details.

Remarks Always use either a nonionic surfactant at 0.25% v/v (1 quart/100 gal spray solution) or a petroleum-based crop oil at 1 to 2% v/v (1 to 2 gal/100 gal spray solution). Use higher crop oil concentration in arid areas. Oil adjuvants must contain at least 80% high quality petroleum (mineral), or modified vegetable seed oil with at least 15% surfactant emulsifiers. Ammonium nitrogen fertilizer may be added to crop oil concentrate or NIS, but is not required. Use 2 quart/a 28% N or 32% N, or 2 lb/a of spray grade AMS. Do not apply if rain is expected within 1 hour of application. Restricted entry interval (REI) is 12 hours.

Caution Do not apply more than 4 applications per acre per season with application intervals greater than 7 days. Do not exceed 28 fl oz/a per season. Do not feed vines or hay. Do not apply through any type of irrigation equipment. Do not harvest within 30 days after application.

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

Chemical family Aryloxyphenoxypropionate

sethoxydim (Poast)

Dry beans only

Rate 0.187 to 0.48 lb ai/a (1 to 2.5 pints/a Poast 1.5EC)

Time Apply to actively growing grasses at grass growth stage indicated on label.

Remarks Always add Sundance HC spray adjuvant at 1 pint/a, or a crop oil concentrate to the spray tank at 2 pints/a. Add UAN at 4 to 8 pint/a, or AMS at 2.5 lb/a for controlling crabgrass, witchgrass, volunteer corn, and all volunteer cereals. Sethoxydim is most effective on actively growing grasses that are not stressed. Sethoxydim is rainfast 1 hour after application. Restricted entry interval (REI) is 12 hours.

Caution Control often is erratic if grasses are stressed by drought, insect damage, extreme temperatures, or herbicide injury. Do not apply within 30 days of dry bean harvest, or within 15 days of succulent bean harvest. Do not exceed 0.96 lb ai/a (4 pints/a Poast) during the season.

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

Chemical family Cyclohexanedione