Insects feed on plant leaves, stems, roots, and flowers. The contaminated sections are really consumed by the chewing insects. Pit feeding on leaves by leaf beetles, flea beetles, and immature caterpillars are examples of leaf eating by chewing insects. Weevils, bigger caterpillars, grasshoppers, and katydids are the most common culprits for irregular scratches along the edges of leaves. The presence of leaf cutter bees is indicated by perfect semicircular cut pieces of leaves. Mining is the process of feeding only on the contents of leaves. Beetles, flies, sawflies, and moths are all home to leaf miners.
How insects injure plants ?