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山核桃刻蚜Kurisakia sinocarye Zhang是为害山核桃Carya cathayensis Sarg.的一种重要害虫,食性单一,常导致山核桃雄花序、雌花芽脱落,叶芽、嫩枝萎缩,甚至整株死亡,造成很大的经济损失。为摸清其发生规律,给防治提供依据,本人进行了观察研究,现将结果整理如下。 一、生物学特性 世代历期 在浙江省一年四代,以卵在芽上、叶痕及树缝中越冬。第一代70—80天;第二代32天;第三代26天;第四代190天。 各代虫态所在地 第一代若虫在芽缝取食,成虫在芽下幼嫩部位;第二、三代若虫群集于叶芽、花芽、花序上,成虫有扩散习性;第三代
Kurisakia sinocarye Zhang is an important insect pest of Carya cathayensis Sarg., Which causes a single feeding habit. It often leads to the male inflorescence of pecan, the loss of female flower buds, the shrinkage of buds, twigs and even death of the whole plant, resulting in a large Economic losses. To find out the law of its occurrence, to provide the basis for prevention and treatment, I conducted an observational study, the results are summarized below. First, the biological characteristics of a generation of four generations a year in Zhejiang Province to eggs in the bud, leaf marks and tree cracks in the winter. First generation 70-80 days; second generation 32 days; third generation 26 days; fourth generation 190 days. The first generation of nymphs of different generations of locusts feed in bud stitches, the young adults are in tender buds. The second and third generation nymphs are clustered in leaf buds, flower buds and inflorescences, and the adults have the habit of spreading. The third generation