甘肃线小卷蛾生物学特性

Bionomics of Zeiraphera gansuensis

甘肃线小卷蛾主要以幼虫危害油松当年新芽 ,在甘肃兴隆山国家级自然保护区人工油松林内普遍发生 ,被害林木顶梢枯黄呈火烧状。此虫 1a发生 1代 ,以卵在当年生针叶上越冬 ;翌年 5月中旬开始孵化 ,5月中、下旬为孵化盛期 ;幼虫 4龄 ,5月中旬到 7月中旬幼虫危害新芽 ,蛹期 7月上旬到 8月中旬 ;8月上旬开始羽化 ,中旬为羽化盛期 ;8月中、下旬为产卵盛期 ,9月上、中旬进入越冬状态。 6月中旬 ,用 2 5 %敌杀死乳油 5 0 0 0倍液喷雾 ,防治效果在 95 %以上 ,用 4 0 %亚胺硫磷乳油 10 0 0倍液喷雾 ,防治效果 90 %左右 ;羽化期可利用黑光灯诱杀成虫。

Zeiraphera gansuensis attacked buds of Pinus tabulaeformis as larva and occurred widely in artificial P. tabulaeformis forests in Xinglongshan.It has one generation a year and overwinters as egg in needles.The egg begins to hatch in mid May the next year and reaches its peak in mid and late May.The larva has 4 instars and attacks buds between mid May and mid July.The pupation period is from the first ten days of July to mid August.The emergence begins in the first ten days of August with a peak in mid August.The peak period for oviposition is between mid and last August.In mid June,spray of 2.5% Decis EC 5 000 times or 40% Phosphacol EC 1 000 times reached the control effects of 95% and 90% respectively.In the emergence period,adults could be trapped with black light lamps.