Which of the following compounds is a commonly cited neonicotinoid insecticide?

• A. Imidacloprid
• B. Glyphosate
• C. Pyrethrin
• D. Malathion

Answer: (A)

Neonicotinoids are a class of insecticides that target the insect nervous system by binding to nicotinic acetylcholine receptors, causing overstimulation, paralysis, and death. They are often systemic in plants, meaning the chemical moves through the plant so pests feeding on any part of it ingest the toxin. Imidacloprid is a classic and widely cited example of this class, representing the characteristic mode of action and use pattern of neonicotinoids.

Glyphosate is a herbicide, used to kill weeds rather than insects. Pyrethrin is an insecticide derived from chrysanthemum flowers with a different mode of action than neonicotinoids. Malathion is an organophosphate insecticide that inhibits acetylcholinesterase, not targeting the nicotinic receptors like neonicotinoids do.