Weed Management Handbook

asulam (Asulox)

Grass and brackenfern control only

Rate 3.34 lb ai/a (1 gal/a)

Time Crabgrass, paragrass, or Californiagrass: apply before seedheads form; Johnsongrass: apply when grass is 18 inches or taller; western brackenfern: apply when fern is in full frond.

2,4-D LV ester (several products)

Rate 1.9 to 7.6 lb ae/a, depending on target species

Time Apply when woody plants are in full leaf and actively growing.

Remarks Use higher rates if plants are stressed. Adding oil or wetting agents and/or using high carrier volumes may enhance control.

aminocyclopyrachlor (Method)

Rate 4 to 18 oz/a

Time Apply preemergence or postemergence when weeds are actively germinating or growing

bromacil (Hyvar X)

Rate 4.8 to 12 lb ai/a

Time Apply immediately before paving to avoid lateral movement of the herbicide as a result of soil movement due to rain or mechanical activity.

Remarks Remove rhizomes, tubers, and other vegetative plant parts by scalping with a grader blade before application.

2,4-D (several products)

Rate 0.475 to 2 lb ae/A

Time Spray when annual weeds are small and actively growing. Treat perennial weeds at the specific growth stage(s) described on the label.

Controlling undesirable plants on pasture and rangeland is an important part of an overall range management program. Undesirable plants use space, moisture, and nutrients that could be put to better use producing forage for grazing animals and wildlife. Poisonous plants are an additional threat to animal health and productivity.

2,4-D (several products)

Rate 0.7 to 2 lb ae/A, depending on weed species and size

Time Depends on target weeds. Apply to grass pastures when annual and biennial broadleaf weeds are small and actively growing, and established perennials are at bud stage, unless indicated otherwise on the label.

Serious weed management issues in pastures are a symptom of a problem with the crop or site. These problems can include grazing methods, fertilization programs, forage species selection, and irrigation or water management.