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新疆阿尔泰山林区落叶松毛虫先后4次暴发成灾,分别在1964—1968年、1977—1980年、1991—1992年、1999—2002年,暴发周期逐渐缩短,由10~15a暴发一次缩短到6~8a暴发1次,2002年以后受害面积显著增大。根据危害情况区划出重点防控区面积10 369.05hm2,分布于56个林班,占总区划面积的2.18%;一般防控区面积18 119.73hm2,分布于76个林班,占总区划面积的3.81%;生态自控区面积为44.765 1×104hm2,占总区划面积的94.02%。
The Altai Mountains forest area Xinjiang Xinjiang has four outbreaks of caterpillar disaster, respectively, in 1964-1968, 1977-1980, 1991-1992, 1999-2002, the outbreak period gradually shortened from 10 to 15a outbreak once shortened to 6 ~ 8a outbreak once, after 2002, the victim area increased significantly. According to the hazardous situation, the key control and control area is 10369.05hm2, distributed in 56 forest classes, accounting for 2.18% of the total area. The general prevention and control area is 18 119.73hm2 and distributed in 76 forest classes, accounting for the total area 3.81%. The area of ecological self-control area is 44.765 1 × 104hm2, accounting for 94.02% of the total area.