麻点豹天牛幼虫和蛹的行为学观察及防治对策探讨

对麻点豹天牛幼虫、蛹的室内饲养和野外观察研究表明：麻点豹天牛在昆明地区2年发生1代，以卵和幼虫越冬。该虫在树干中生活的历期占一生中的90％以上。通过对在树干中的生长发育进程及一系列体色变化和蜕皮过程的观察，测定出幼虫的虫龄为11龄，蛹的发育起点温度为8．53℃，有效积温为328．95℃。

A Study on Behavior Mechauism and Management Strategy of Coscinesthes salicis Larve and Pupae in the Trunk

Coscinesthes salicis ,a longhorn beetle which bore the trunk and branch of poplar and willow in larvae phase,may destroy the branches or even lead the trees to death.More than 90 percent of the life cycle of this pest insect is spent inside the tree.Through the artificial feeding in the laboratory and the field investigation in past three years,the observations on the biological characteristics of larvae and pupae,the color changes as well as the development progress within the period from larva to pupae were made.Besides,the minimum temperature for development and the accumulative temperature were also tested.With eleven instars, Coscinesthes salicis have one generation every two years,and spend the winter in form of full-blown larva and egg in Kunming district.These results provide reliable scientific basis for developing effective management strategy.