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1986年,在黑龙江省朗乡林业局贮木场采集到二十几种天牛,这些天牛对贮木场木材的为害,因材种、楞位、楞堆大小、楞堆各层次以及贮放时间长短不同而异。对木材为害重,发生数量多的有云杉大黑天牛(Monochamus urussovi Fisch.)、云杉小黑天牛(Monochamus sutor L.),云杉花黑天牛(Monochamus saltuarius Gebl.)。致使木材降等降价,降低工艺利用水平,初步估算,贮放二年的桦木、冷杉因天牛为害所造成的损失,平均每立方米分别达17.7元和29.3元。同时,贮木场天牛大发生,形成虫源地,向邻近林地扩散,对林木生长有潜在的威胁,因此,重视、研究和综合治理贮木场蛀材害虫是非常必要的。
In 1986, more than twenty kinds of celastrus were collected from the forestry field of Longxiang Forestry Bureau of Heilongjiang Province. These cerastes harmed wood in the yard because of the variety of wood, the position of flute, the size of flute, The length of time will vary. Wood damage, the occurrence of a large number of spruces big black bull (Monochamus urussovi Fisch.), Spruce (Cocos monshamus sutor L.), spruce (Coccinella septentrional bull) (Monochamus saltuarius Gebl.). As a result, the price of wood was lowered and the utilization of technology was reduced. Preliminary estimates indicated that the losses caused by the harm of birch and fir for two years were respectively 17.7 yuan and 29.3 yuan per cubic meter. At the same time, it is very necessary to study, synthesize and control the pests of moths in the lumber yard because of the great occurrence of the terrestrial cattle and cattle, the formation of the source of insects and the spread to adjacent woodlands, which may pose a potential threat to the growth of trees.