丽江云杉种子大痣小蜂的研究

丽江云杉种子大痣小蜂尾长尾小蜂科大痣小蜂属，是云南省西北部地区丽江云杉的主要种实害虫，此害虫在云南省丽江地区１年完成１个世代，主要以末龄幼虫在种子内越冬，每粒种子内只有１条幼虫，幼虫一生仅食１粒种子，无转移危害习性，在整个发育过程中，幼虫取食云杉种子，并在种子内化蛹，成虫羽化时咬破种皮飞出，文中还报道了丽江云杉种子大痣小蜂的形态特征及其生物学特性，提出了防治措施。

A Study on the Lijiang Spruce Seed Chalcid

The seed chalcid (Megastigmus likiangensis Roques et Sun) is a serious pest of spruce trees in Yunnan, especially in the artificial Plantations of the province. Four species of the genus Megastigmus in phytophagous group have been reported from Yunnan Province. They are known as seed chalcids infesting mainly cypress and also spruce and Juniper. The species studied was first discovered in a Picea likiangensis plantation of Lijiang County in 1993. The larvae feed on spruce seeds. The morphological characteristics of the pest are described. The biological characteristics of this seed chalcid are closely studied to provide a reference for the management measures of the pest. Preliminary pest management strategy and tactics are suggested in the text. They have been implemented in recent years at some heavily infested spruce stands with promising results.