Which of the following is an example of a non-pest on plants?

Which of the following is an example of a non-pest on plants?

• A. Lady beetles
• B. Elm leaf beetle
• C. Mimosa webworm
• D. Bagworm

Answer: (A)

Beneficial insects that don’t cause plant damage are considered non-pests because their role is to help control other pests. Lady beetles are a classic example; they are predators that feed on common plant pests like aphids, mites, and scale, which protects plants and reduces the need for chemical controls. The other organisms listed are pests because they actually damage plants. Elm leaf beetles chew on elm leaves, defoliating the trees. Mimosa webworms tunnel into and defoliate mimosa trees by feeding on the leaves, and bagworms construct protective cases and feed on foliage, often causing significant defoliation.

Beneficial insects that don’t cause plant damage are considered non-pests because their role is to help control other pests. Lady beetles are a classic example; they are predators that feed on common plant pests like aphids, mites, and scale, which protects plants and reduces the need for chemical controls.

The other organisms listed are pests because they actually damage plants. Elm leaf beetles chew on elm leaves, defoliating the trees. Mimosa webworms tunnel into and defoliate mimosa trees by feeding on the leaves, and bagworms construct protective cases and feed on foliage, often causing significant defoliation.