论文部分内容阅读
近20年来,在河北、河南、山西等地,枣尺蠖(Chihuo zao Yang) 已成为苹果树主要食叶害虫之一。在土壤管理不善,或与枣树邻近的苹果园时有猖獗发生。该虫1年1代,春季和初夏发生危害,以蛹在苹果树冠土下越冬。此虫产卵量大,三龄后的幼虫食量大,且抗药性强,生产上需要提供准确的防治适期。现提出调查日最高诱蛾量、卵块级别分布及幼虫虫龄分布的方法,以指导适时防治枣尺蠖幼虫。
For nearly 20 years, Chihuo zao Yang has become one of the major leaf-eating pests in apple trees in Hebei, Henan and Shanxi. In poor soil management, or jujube trees near the apple orchard rampant occurs. The worm 1 year a generation, the occurrence of spring and early summer hazards to the pupae in the apple crown soil overwinter. This worm fecundity, larvae after age three large appetite, and strong resistance, the production needs to provide accurate control of the right period. At the survey date, the maximum number of moths, the distribution of egg masses and larvae age distribution are put forward to guide the timely control of jujube larvae.