青叶蝉在我省各地普遍发生,尤以管理粗放的果园受害严重。此虫主要是成虫在林果幼嫩皮下产卵为害。严重时,其在主干、主侧枝皮下均可产越冬卵,使树体受伤,导致并发其他病虫。在早春干旱时,常使树枝抽条枯死;在寒冷地区,对幼树越冬极为不利。此虫产越冬卵的果树寄主有苹果、梨、桃、杏等。生活史:据初步观察,青叶蝉在我站一年发生三代。四月上旬越冬卵开始孵化,下旬为孵化盛期。第一代成虫发生于六月上旬。第二代成虫发生于八月。第三代成虫发生于九至十 Green leafhopper occurred throughout the province, especially in the extensive management of the orchard suffered serious. This insect is mainly adult insects lay eggs in young fruit damage. In severe cases, its main trunk, the main collateral subcutaneous can produce winter eggs, so that tree injuries, resulting in concurrent other pests. In the early spring drought, the branches often dying; In cold areas, young trees are particularly detrimental to the winter. The insect pests overwintering eggs, fruit trees host apple, pear, peach, apricot and so on. Life history: According to preliminary observation, leafhopper in my station occurs three generations a year. In early April, the overwintering eggs begin to hatch, and the late is the incubation period. The first generation of adults occurred in early June. The second generation of adults occurred in August. The third generation occurs in nine to ten adults