Life habits of Chrysomelidae

The adults and larvae of this family are phytophagous, feeding on the roots, stems, leaves and flowers of plants. Many species cause serious harm to crops, vegetables, trees, fruit trees and pasture. For example, the world-famous pest potato beetle belongs to the family Chrysomelidae. The host plants of Chrysomelidae insects are mainly angiosperms, with few gymnosperms. In the oligotrophic group, there is often a parallel phenomenon between the classification system of Chrysomelidae and the host plants, that is, many genera of Chrysomelidae take one or several related plant families as the parasitic range. Such as Phyllostachys pubescens, Phyllostachys pubescens take willow as the host; Lepidoptera insects are parasitic in Cruciferae plants; Lepidoptera and Lepidoptera are parasitic on rutaceae plants; Lepidoptera feed on solanaceae plants; Leaf beetle feeds on willow and betulaceae plants; Platycladus feeds on Juglandaceae and betulaceae. Some monophagic species have been used for biological weeding.

The lifestyle of larvae is quite inconsistent. The subfamily is mostly edible with bare leaves, and its larvae mature and pupate in the soil, or pupate under hanging leaves, such as Caragana and Caragana. Vitex negundo uses feces to build nests between the stems and branches of host plants, and larvae hide and feed on the stems, maintaining the original feeding habits of Vitex negundo insects. Xenopus has viviparous phenomenon. Most of the suborder Xanthoptera and Lepidoptera are parasitic on the roots outside the soil, such as Cucurbitaceae, Lepidoptera, Lepidoptera and so on. Other genera, such as Lepidoptera, Lepidoptera, Lepidoptera Takegawa Hotaru and Lepidoptera, eat naked leaves. There are also some individuals who are hurt by stem borers. Such as orange leaf miner, corn spiral worm, chestnut gall insect and so on, eat the stem base of seedlings.