Elm leaf beetle damage is primarily caused by which life stage?

Elm leaf beetle damage is primarily caused by which life stage?

• A. Egg
• B. Larva
• C. Pupa
• D. Adult

Answer: (B)

The main thing being tested is which life stage does the most feeding and tissue loss on the leaves. Elm leaf beetle larvae are the primary culprits because they actively feed on the leaf tissue in large numbers, often in groups, and their feeding skeletonizes and tunnels through the leaves. This dense feeding removes a lot of photosynthetic area and leads to noticeable defoliation. Eggs are just initial stages and don’t feed, pupae are dormant and not feeding, and adults do feed but usually cause far less damage compared to the destructive larval feeding. So, the larval stage is responsible for the majority of damage to elm leaves.

The main thing being tested is which life stage does the most feeding and tissue loss on the leaves. Elm leaf beetle larvae are the primary culprits because they actively feed on the leaf tissue in large numbers, often in groups, and their feeding skeletonizes and tunnels through the leaves. This dense feeding removes a lot of photosynthetic area and leads to noticeable defoliation. Eggs are just initial stages and don’t feed, pupae are dormant and not feeding, and adults do feed but usually cause far less damage compared to the destructive larval feeding. So, the larval stage is responsible for the majority of damage to elm leaves.