Chewing mouthparts typically cause which leaf damage?

Chewing mouthparts typically cause which leaf damage?

• A. Notched or ragged leaves
• B. Yellowed leaves
• C. Rust spots
• D. Girdled stems

Answer: (A)

Chewing mouthparts physically remove leaf tissue, so the damage appears as notched or ragged edges along the leaf margins. This feeding style, seen with caterpillars, beetles, and grasshoppers, creates irregular, jagged outlines rather than uniform holes or discoloration. In contrast, yellowing leaves typically come from sap-sucking pests or nutrient issues, rust spots from fungal infections, and girdled stems from insects that damage the stem itself rather than the leaf edges. So the notched or ragged leaf damage is the telltale sign of chewing mouthparts.

Chewing mouthparts physically remove leaf tissue, so the damage appears as notched or ragged edges along the leaf margins. This feeding style, seen with caterpillars, beetles, and grasshoppers, creates irregular, jagged outlines rather than uniform holes or discoloration. In contrast, yellowing leaves typically come from sap-sucking pests or nutrient issues, rust spots from fungal infections, and girdled stems from insects that damage the stem itself rather than the leaf edges. So the notched or ragged leaf damage is the telltale sign of chewing mouthparts.