Pest Control Technician Practice Exam

What is one effect of carbamate insecticides on cholinesterase?

1. They promote its activity

2. They inhibit its activity

3. They have no effect

4. They enhance its production

The correct answer is: They inhibit its activity

Carbamate insecticides are known for their mechanism of action, which involves the inhibition of the enzyme acetylcholinesterase. This enzyme is crucial for the breakdown of the neurotransmitter acetylcholine in the synapses of the nervous system. When carbamates inhibit acetylcholinesterase, acetylcholine accumulates, leading to overstimulation of the nerve receptors. This can cause a range of toxic effects in insects, ultimately leading to paralysis and death. Understanding this action is important for pest control technicians, as it highlights the potential for carbamate insecticides to disrupt normal nerve function. Knowledge of cholinesterase activity and its inhibition is vital for both the effective application of these pesticides and for ensuring safety during their use, considering that similar effects can occur in non-target organisms, including humans. Insects have a specific threshold for exposure to these insecticides, and this inhibition can result in significant consequences for pest management strategies, further emphasizing the need to apply these substances judiciously.