论文部分内容阅读
光臀八齿小蠹(Ips nitidus Egg)属鞘翅目小蠹科,是危害祁连山林区主要树种青海云杉(Picea crassifolia Kom)的优势虫种,严重影响水源林作用的发挥,并威胁其存在。1971—1975年东祁连山西段(北坡)寺大隆林区,随着择伐作业的开展,因木材调运不及时,长期存放山楞(林缘和林间空地),林场清理较差,以及冬季修路炸伤林木等原因,在17000亩作业区内小蠹虫全面危害,局部地段业已成灾。据调查,青海云杉林中已发现九种小蠹,其中光臀八齿小蠹危害最严重,它不仅侵害衰弱木,也为害中龄健康木(未发现
Ips nitidus Egg is a dominant species of Coleoptera, which is one of the dominant insect species that endangers Picea crassifolia Kom, a major tree species in Qilian Mountains. It seriously affects the role of water source forests and threatens their existence . From 1971 to 1975, in the Dalonglin area of the western section of the Eastern Qilian Mountains (northern slope), along with the development of selective cutting operations, due to the lack of timely transportation of timber and the long-term storage of mountain flutes (forest margin and open ground) As well as the winter road repair trees and other reasons, in 17,000 acres of operating area beetles full of hazards, the local lot has been disaster. According to the survey, nine species of Beetles have been found in the spruce forest in Qinghai. Among them, Bombyx optica is the most harmful. It not only affects the weak wood but also the aged middle aged healthy wood