Weed Management Handbook

activated carbon

Oregon and Washington only

Rate 25 lb/A in a 1-inch band (equal to a 300 lb/A broadcast application)

Time At planting.

carfentrazone (Aim EC)

Rate Up to 0.031 lb ai/A (0.5 to 2 fl oz/A Aim EC)

Time Before planting or up to 24 hr after planting. Apply to actively growing weeds up to 4 inches tall and to rosettes less than 3 inches across.

Remarks See label for specific tank-mixes and adjuvant recommendations. Good spray coverage is essential for control.

2,4-D (various trade names)

Rate 0.5 to 1 lb ae/A

Time Apply when barley is in hard dough stage to control weeds that will interfere with harvest.

Remarks Results are best when soil moisture is sufficient for active weed growth. REI 12 hr for the low volatile ester (LVE) formulation and 48 hr for the amine formulation.

2,4-D (various trade names)

Rate 0.25 to 1.25 lb ae/A

Time Apply when barley is fully tillered but before jointing.

metribuzin (various trade names)

Rate 0.75 to 8 oz ai/A (1 to 10.66 oz/A of the 75DF or 1.5 to 16 fl oz/A of the 4F)

Time Apply low rates (0.75 to 3 oz ai/A) when barley is in two-leaf to four-tiller growth stage. Apply 3 to 8 oz ai/A when barley has more than four tillers and secondary roots are longer than 1 inch, but before jointing growth stage.

pinoxaden (Axial XL)

Rate 0.053 lb ai/A (16.4 oz/A Axial XL 0.42EC)

Time Apply to spring barley from the 2-leaf to pre-boot stage. Apply to wild oat from 1- to 6-leaf stage on the main stem but before the fourth tiller emerges. Apply to green or yellow foxtail, Italian ryegrass, barnyardgrass, wild proso millet, and windgrass from one- to five-leaf stage on the main stem but before third tiller emerges.

2,4-D LV ester

Rate 2 lb ae/A

Time When leaves are fully developed.

Remarks Two to three annual re-treatments may be necessary for complete control.

Caution Avoid drift to sensitive crops.

Site of action Group 4: synthetic auxin

2,4-D LV ester

Rate 1.9 to 2.85 lb ae/A

Time Apply in spring or fall to rosettes, or in early summer when plant is in bud.

Remarks For satisfactory control, it may be necessary to treat infested areas during both the rosette and bud stages of growth.

Caution Avoid drift to sensitive crops.

imazapic (Plateau, Panoramic)

Rate 5 oz /A Plateau or Panoramic

Time Apply in the fall after African wiregrass has emerged.

Remarks High litter levels may reduce effectiveness, some bare ground should be visible for better control. Labeled for use on pasture, range, Conservation Reserve Program (CRP), and non-cropland.

2,4-D LV ester

Rate 2 to 3 lb ae/A

Time Apply when leaves are fully developed and growing.

Remarks Use oil (no lower than No. 2 diesel) for aerial application. Willows will resprout, and re-treatment may be required.

Caution Avoid drift to sensitive crops.