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近年来,梨木虱在梨树上的危害逐步加重,春季多集中在新梢、叶柄危害,夏、秋季多在叶背危害,以成虫和若虫吸食芽、叶及嫩梢的汁液,使受害叶片发生褐色枯斑,严重时引起早期落叶。由于此虫世代重叠,若虫分泌粘液,故应以早治为主,综合防治。
In recent years, the harm of pear psylla on pear tree is gradually aggravating. In spring, most of the pests are concentrated on shoots and petiole. In summer and autumn, leaf pests are more harmful to the leaves. Buds of the buds, leaves and shoots are absorbed by adults and nymphs, Occur brown brown spot, causing severe early deciduous leaves. As this worm generations overlap, Nymph secretion mucus, it should be early treatment-based, comprehensive prevention and treatment.