Name two commonly used herbicides in rangeland management and a key caution for each.

• A. Glyphosate — avoid contact with desirable plants; 2,4-D — can affect some grasses if misapplied and may have grazing restrictions
• B. Glyphosate — only for aquatic weeds; 2,4-D — never affects grasses; Both are safe near grazing animals
• C. 2,4-D — preferred for all grasses; Glyphosate — safe to mix with any tankmate
• D. Glyphosate — increases growth of desirable plants; 2,4-D — has no grazing restrictions

Answer: (A)

Two commonly used herbicides in rangeland management are glyphosate and 2,4-D. Glyphosate is a non-selective systemic herbicide, so it kills most green vegetation it contacts, making it effective for removing unwanted plants or preparing a site for reseeding. The key caution is to avoid contact or drift onto desirable forage species, and to follow label instructions to protect non-target plants and water sources.

2,4-D is a selective broadleaf herbicide used to control broadleaf weeds while generally sparing grasses, but it can affect some grasses if misapplied or used under unsuitable conditions. A critical caution is to be aware of grazing restrictions or withholding periods after application, since residues can persist in forage and require delaying grazing.