Arge huazhongia Wei is a new pest on Kushui Rose in Lanzhou City of China,with two generations a year. The larvae cluster together to feed on rose leaves. Female adults lay their eggs at the top of one-year-old branches of Kushui Rose. The mature larvae survive the winter cocooning in the rhizosphere of rose fallen leaves and frass,and emerge into adults in middle or late May. The injury rate of rose plants reaches 81. 4%,and that of one-year-old shoots reaches30. 6%.
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