What is a major drawback of broad-spectrum insecticides?

What is a major drawback of broad-spectrum insecticides?

• A. They only kill pests, not beneficial insects.
• B. They cost too much.
• C. They kill beneficial insects as well as pests.
• D. They are ineffective indoors.

Answer: (C)

Broad-spectrum insecticides affect a wide range of insects, not just the pests you’re targeting. They kill many beneficial insects as well—natural enemies like predators and parasitoids that normally help keep pest populations in check, plus pollinators that support flowering plants. Because those beneficials are wiped out, pest populations can rebound more quickly or even shift to other pests, leading to more sprays or higher pest problems over time. This disruption of natural control is the major drawback, which is why selective, targeted options and IPM strategies are preferred.

Broad-spectrum insecticides affect a wide range of insects, not just the pests you’re targeting. They kill many beneficial insects as well—natural enemies like predators and parasitoids that normally help keep pest populations in check, plus pollinators that support flowering plants. Because those beneficials are wiped out, pest populations can rebound more quickly or even shift to other pests, leading to more sprays or higher pest problems over time. This disruption of natural control is the major drawback, which is why selective, targeted options and IPM strategies are preferred.