Any of various insect larvae that live and feed within a leaf, including caterpillars, sawfly larvae, beetle and weevil grubs, and dipteran maggots.

• 许多在叶中生活并取食的昆虫幼虫的统称，包括毛虫、叶蜂幼虫、甲虫和象甲虫以及双翅类昆虫的蛆。