山楂红蜘蛛是我市果树和园林树木上的主要害虫之一,它不仅为害树木的正常生长,常常造成叶片干枯、脱落,影响观瞻和市容,而且在果树上往往造成两次开花,影响当年和第二年的产量。山楂红蜘蛛形体小,繁殖快,群集叶背拉网为害,近几年日趋严重。它除为害苹果、梨、桃外、刺槐、国槐、臭椿、柳树、泡桐、法桐、加杨、毛白杨等乔木和红叶李、花石榴、木槿,蔷薇、槭叶枫等灌木,均遭其为害。为此,我们从 Hawthorn spider mite is one of the main pests on the fruit trees and garden trees in our city. It not only harms the normal growth of trees, but also often causes the leaves to dry and fall off, affecting the view and the appearance of the cityscape. The second year of production. Hawthorn spider body is small, fast propagation, the cluster leaves the back pull network harm, increasingly serious in recent years. It is not only harmful to apple, pear, peach, black locust, Sophora japonica, Ailanthus altissima, willow, paulownia, Fatong, Canada poplar, Populus tomentosa trees and leaves, flowers pomegranate, hibiscus, rose, maple leaf maple and other shrubs, Harmful. To this end, we from