1. Myzus persicae: adults and larvae cluster on the back of the leaves, and the injured leaves roll vertically from the edge of the leaves to the back of the leaves. The tissues become thick and chlorotic, and the mucus is excreted to pollute the branches and leaves, inhibit the growth of new shoots, and cause defoliation. 2. Hawthorn red spider: It has 5-9 generations a year and overwinters as female adults in the soil, dead leaves and weeds near the bark gap and trunk of the tree. In the first ten days of April, the peach blossom blooms at the end of the period, which endangers the newborn young tissues. The eggs are laid after the flowering period, and the eggs hatch after falling. 3. Tea wing bug: Adults and nymphs ingest
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