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近年来,随着大量外地苗木的引进,我市园林害虫种类逐渐增多,而且害虫种群的消长也有较大变化,危害园林植物的优势种由90年代初的咀嚼式口器害虫逐渐发展为近几年的刺吸式口器害虫。刺吸式口器害虫,如蚧壳虫、蚜虫等一般虫体小,繁殖量大、代次多,世代重叠,很难彻底防治。被害植株叶片失绿,变黄、落叶或叶片上生有被害虫排泄物诱发的煤污病,影响
In recent years, with the introduction of a large number of foreign seedlings, the species of garden pests in our city gradually increased, and the growth and decline of pest populations also changed greatly. The dominant species that endangered garden plants gradually developed from chewing mouthpart pests in the early 1990s to recent Thorn sucking mouthparts pests. Suction mouthparts pests, such as scale insects, aphids and other general small worms, breeding a large number of generations, generations, overlapping generations, it is difficult to thoroughly control. Victims of plant leaves green, yellow, deciduous leaves or leaves on the pest excretion-induced coal pollution, affecting