To control a broadleaf weed without harming surrounding grasses, the best herbicide is

• A. Glyphosate
• B. Triclopyr
• C. 2,4-D
• D. Atrazine

Answer: (B)

Selective broadleaf weed control in turf relies on herbicides that are toxic to broadleaf plants but safe for grasses. Triclopyr fits this role well because it is taken up by the leaves of broadleaf weeds and moves to growing points, causing death in those plants while grasses tolerate it at labeled application rates. That makes it effective for eliminating broadleaf weeds without damaging the surrounding grass. In contrast, a non‑selective option would kill everything with green tissue, including the grass. While 2,4-D is also used for broadleaf control, certain grasses can be more sensitive to it under some conditions, and it may be less effective on some persistent or woody broadleaf weeds than triclopyr. Atrazine is more problematic for many lawn grasses and is not a preferred turf herbicide. So, for targeting broadleaf weeds while preserving surrounding grasses, triclopyr is the best choice.