Which option represents a biological control method?

Which option represents a biological control method?

• A. Pesticide spray
• B. Mowing
• C. Hand removal
• D. Releasing beneficial insects

Answer: (D)

Biological control relies on living organisms to reduce pest populations. Releasing beneficial insects fits this approach because you introduce natural enemies that prey on or parasitize pests, helping keep their numbers down without relying on chemical sprays. This is a sustainable part of integrated pest management and can provide longer-lasting suppression when paired with other practices. By contrast, a pesticide spray is chemical control and can harm non-target species and drive resistance; mowing and hand removal are mechanical or cultural methods that reduce pests without using living enemies. So releasing beneficial insects is the biological control method.

Biological control relies on living organisms to reduce pest populations. Releasing beneficial insects fits this approach because you introduce natural enemies that prey on or parasitize pests, helping keep their numbers down without relying on chemical sprays. This is a sustainable part of integrated pest management and can provide longer-lasting suppression when paired with other practices. By contrast, a pesticide spray is chemical control and can harm non-target species and drive resistance; mowing and hand removal are mechanical or cultural methods that reduce pests without using living enemies. So releasing beneficial insects is the biological control method.