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果梢斑螟(Dioryctria pryeriRagonot)是蛀食类害虫,以幼虫危害红松当年生球果和先年生球果及嫩梢。在吉林省抚松县露水河林业局该虫1 a发生1代,以3~4龄幼虫在球果内、果痕处及嫩梢内越冬。翌年5月开始活动危害,5月末至6月下旬为蛹期。6月中旬始现成虫羽化,终见于7月上旬。6月中旬至7月上旬为卵期,6月末至7月中旬幼虫孵化,部分幼虫在球果采摘前转移至果痕附近、嫩梢、当年生球果内继续危害,于9月下旬进入越冬状态。
Dioryctria pryeriRagonot is a pest-eating pest that attacks larvae on coniferous and annual cones and young shoots of Korean pine. In the Lushuihe Forestry Bureau of Fusong County, Jilin Province, the pest lasted 1 generation, with 3 ~ 4 instar larvae overwintering in the cones, fruit marks and tender shoots. Activities in May the following year the endangered, late May to late June pupal stage. In mid-June emergence adult emergence, finally seen in early July. Larvae hatch from mid-June to early July, and larvae hatch from late June to mid-July. Some larvae migrate to fruit marks before the picking of young fruits. Young shoots continue to endanger the coniferous fruit in that year and enter winter in late September status.