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一、前言落叶松是吉林地区主要造树林种之一。随着造林事业的不断发展,近年来梢部害虫的相继发生、危害和造成的损失,已经成为森林保护工作中急待解决的问题之一。1973年蛟河县青背林场等地落叶松人工林幼林发生松瘿小卷蛾(aspeyvesia zebeana)为害。1975年磐石县烟筒山林场等地同类落叶松人工林幼林又发生落叶松长须卷蛾为害,至今为害区域已扩散到全县4个公社,面积达2万余亩。这两种梢部害虫均造成主梢断折、
I. Introduction Larch is one of the major tree-planting species in Jilin. With the continuous development of afforestation, the occurrence, damage and loss of shoot pests in recent years have become one of the urgent problems to be solved in the forest protection work. In 1973, Jiaohe County Green back forest and other places Larix forest plantation pine moths (Aspeyvesia zebeana) damage. In 1975, Shek Kip Shan Forest Farm and other places similar Larch plantations young larch also occur Larvae moth damage, so far the area has spread to harm the four communes, covering an area of 20,000 mu. These two kinds of tip pests have caused the main shoot break,