Associate Certified Entomologist (ACE) Practice Exam

Which ingredient in pest control products is known for its very low mammalian toxicity?

1. Fipronil

2. Chlorfenapyr

3. Abamectin

4. Chlorantraniliprole

The correct answer is: Abamectin

Abamectin is recognized for its very low mammalian toxicity, making it a preferred option in various pest control scenarios, particularly when safety is a priority. This ingredient is derived from naturally occurring soil microorganisms and is effective against a range of pests while posing minimal risk to mammals, including humans. Its mode of action targets the nervous system of invertebrates, leading to paralysis and death in pests like insects and certain mites, while mammals metabolize Abamectin differently, resulting in much lower levels of toxicity. This characteristic allows it to be used in environments where non-target organisms, including beneficial species and humans, may be present, adding to its appeal as a safer insecticide. In contrast, the other provided options have varying degrees of toxicity in mammals, making them less favorable in situations where safety is the primary concern.