There are many kinds of mouthparts of insects, including sucking type (rice planthopper, thrips), chewing type (moth and butterfly larvae) and licking type (liriomyza sativae).

White dots will appear on the leaves of plants damaged by piercing-sucking mouthparts. If the damage is serious, the whole leaves will turn white.

In chewing mouthparts, leafy vegetables are common, and only irregular holes are made directly on the leaves.

Liriomyza sativae licks the leaves with sucking mouthparts, and white spots with the size of "."appear. If it licks too much, the leaves will be deformed.