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云杉是小兴安岭的主要树种之一。它树干高大挺直,材质优良,是工农业生产的重要原料。云杉在小兴安岭原始林中有相当比重,约占总蓄积量的18%。几年来,我区很多云杉林发生了蠹虫危害,急待进行研究防治。现根据实际考察,结合有关理论,谈谈云杉蠹虫危害的起因和防治措施。一、样地调查和受害情况调查地点:丰林局杨树河施业区124林班生产干线14K—15K 前进方向右侧;半阴坡,缓山脚;云、冷、桦幼壮林;林地郁闭度0.5,采前郁闭度为0.8,云杉群状分布。
Spruce is one of the main tree species in the Xiaoxing’an Mountains. Its trunk tall and straight, good material, is an important raw material for industrial and agricultural production. Spruce has a significant proportion of the original forest in Xiaoxing’anling, accounting for about 18% of the total stock. In recent years, many spruce forests in our district have been beetles jeopardized, and research and prevention are urgently needed. According to the actual inspection, combined with the relevant theory, to talk about the causes of spruce silver beetle hazards and prevention and control measures. Site survey and victimization Location: Fenglin Bureau of Yangshuhe 124 Linban production line 14K-15K forward direction to the right; semi-shady slope, gentle foot; cloud, cold and birch young Zhuang Lin; Degree 0.5, before harvest canopy density of 0.8, spruce group distribution.