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光臀八齿小蠹(Ips nitidus Egg.)属鞘翅目小蠹虫科,是危害祁连山林区主要树种青海云杉(Picea crassifolia Kom.)的优势先锋虫种,对水源涵养林威胁极大。 1971年至1975年祁连山北坡后山寺大隆林区,随着择伐作业的开展,因木材调运不及时,长期存放山楞(林缘和空地),林场清理差,冬季修路炸伤树木等原因,在17000亩作业区上小蠹虫全面发生,有的地方业已成灾。据调查,现已发现九种小蠹虫,其中以光臀八齿小蠹危害严重,被害率占虫害木76％,侵害健康木(未发现其他虫种侵入)后,1
Ips nitidus Egg is a dominant species of Picea crassifolia Kom. Which is endangered by the dominant species of Picea crassifolia Kom., And threatens water conservation forests. 1971 to 1975 Qilianshan northern slope of Mount Temple Dalong forest area, with the selection of operations carried out due to lack of timely transportation of timber, long-term storage Hill Leng (forest edge and open space), poor clearing forest, winter road repair injury trees And other reasons, in the 17,000 acres of operating area beetles occur in full swing, and some places have been affected. According to the survey, nine species of beetles have been found, of which Halophthalmus obscurus is seriously endangered. The rate of damage accounted for 76% of the pests, affecting healthy wood (no other species were found invaded)