Which product is used for non-selective weed control of emerged weeds, has no soil residual, and can act by both contact and systemically with effects showing up sooner than glyphosate?

Which product is used for non-selective weed control of emerged weeds, has no soil residual, and can act by both contact and systemically with effects showing up sooner than glyphosate?

• A. Finale
• B. Roundup
• C. Monument
• D. Solitaire

Answer: (A)

This item tests understanding of herbicide properties, specifically non-selective postemergence control that doesn’t leave soil residues and can act by both contact and some systemic action with rapid visible effects. Finale fits because it contains glufosinate ammonium, a true contact herbicide that also has some systemic movement. It kills emerged weeds quickly by inhibiting glutamine synthetase, causing rapid tissue disruption and death. It degrades quickly in soil, so there’s no soil residual to affect new seedlings. The result is a fast burn-down of active weeds, typically sooner than glyphosate-based products. Monument is a preemergent with soil activity, so it wouldn’t control emerged weeds. Roundup (glyphosate) is systemic but relies more on internal translocation and may show tissue death a bit later than glufosinate. Solitaire doesn’t match the described mode of action and use.

This item tests understanding of herbicide properties, specifically non-selective postemergence control that doesn’t leave soil residues and can act by both contact and some systemic action with rapid visible effects. Finale fits because it contains glufosinate ammonium, a true contact herbicide that also has some systemic movement. It kills emerged weeds quickly by inhibiting glutamine synthetase, causing rapid tissue disruption and death. It degrades quickly in soil, so there’s no soil residual to affect new seedlings. The result is a fast burn-down of active weeds, typically sooner than glyphosate-based products. Monument is a preemergent with soil activity, so it wouldn’t control emerged weeds. Roundup (glyphosate) is systemic but relies more on internal translocation and may show tissue death a bit later than glufosinate. Solitaire doesn’t match the described mode of action and use.