Which statement reflects the risk of using a non-selective herbicide in a grazed rangeland?

• A. It will only affect target weed species.
• B. It will improve all plant growth in the area.
• C. It may damage desirable forage species and grazing plans.
• D. It has no impact on grazing decisions.

Answer: (C)

Non-selective herbicides kill a broad range of plants they contact, not just the target weeds. In a grazed rangeland, that means desirable forage species such as grasses and legumes can be damaged or killed, reducing forage availability and potentially altering the plant community. This can complicate grazing plans, since you may need to adjust stocking rates, rotation, or rest periods to recover forage and reestablish preferred species. Drift or residues can injure forage even if the application was aimed at weeds, and the recovery of desirable species can take time, affecting long-term grazing decisions.

The other ideas don’t fit because a non-selective herbicide does not only affect target weeds; it does not improve all plant growth, and it can and often does influence grazing decisions due to changes in forage availability and timing.