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落叶松实小卷蛾(Petrova perangustana Snell)是落叶松球果严重害虫之一。一年或二年一代,以蛹(少数幼虫)结丝茧在树干老翘皮下越冬,成虫4月下旬出现,幼虫5月中旬开始取食球果,老熟幼虫于6月下旬脱果钻入树皮裂缝化蛹并越冬。有数种天敌对其有重要控制作用。防治方法可于4月上中旬在树干3米以下刮老翘皮并将越冬蛹装入养虫笼中消灭其成虫,同时可使寄生蜂飞回林中继续抑制害虫,可减少球果被害率50%。再于成虫盛期向树冠喷两次1:800倍40%氧化乐果有良好防效。
Petrova perangustana Snell is one of the major pests of larch cones. One year or two generations, the pupa (a few larvae) knot silkworm cocoon wintering in the trunk of the old Alice, adults appear in late April, the larvae began to eat the mid-May of cones, mature larvae in late June, Bark cracks pupae and wintering. There are several natural enemies that have an important control over them. Prevention and control methods can be in the middle of April in the trunk less than 3 meters scraping the old Alice skin and the overwintering pupa into the rearing cages to eliminate their adult worms at the same time allows the parasitic wasp fly back to the forest to continue to suppress pests can reduce the rate of damage cones 50%. Sprayed once more into the canopy at 1: 800 times 40% omethoate during full bloom.