榆树是东北地区重要的造林树种之一。但由于多年来榆紫叶甲Ambrostoma quadriimprassum严重危害,往往使部份农田防护林或片林中的榆树成为小老树,甚至枯死。为探索榆紫叶甲生物防治的途径与方法,笔者于1973～1974年间在黑龙江省龙江县海洋林场,对榆紫叶甲卵的天敌种类及其主要生物学特性等进行了初步观察。现将结果报导如下,以供进一步开展生物防治时参考。 Elm is one of the important afforestation species in Northeast China. However, due to the severe damage of Ambrostoma quadriimprassum over the years, some of the farmland shelterbelts or elm trees in the forest often become small old trees and even die. In order to explore the ways and methods of biological control of Ulva pertussis, the author conducted preliminary observations on the natural enemies, their main biological characteristics and the like of the egg of Elder’s Purple eggs from 1973 to 1974 in the marine forest farm in Longjiang County, Heilongjiang Province. Now the results reported below, for further biological control reference.