Chloronoicotinyls are a class of insecticides characterized by which trait?

• A. Greater selectivity and lower risks to humans, wildlife and the environment.
• B. High toxicity to mammals and broad environmental risk.
• C. Broad-spectrum broadleaf weed control.
• D. They are a class of herbicides.

Answer: (D)

Chloronicotinyls are insecticides that target the insect nervous system by binding to nicotinic acetylcholine receptors. This causes overstimulation, leading to paralysis and death in insects, while mammals are comparatively less affected. They are valued for their insect-specific action and systemic properties, meaning a plant can translocate the chemical and provide protection from within. They are not herbicides; their purpose is to control insect pests, not weeds. So the defining trait is that they are insecticides with a neural target in insects, rather than chemicals used to kill plants.