苹果蠹蛾的生物学特性及消长动态

苹果蠹蛾(Cydia pomonellaL.)在甘肃张掖地区1年发生2代和一个不完整的第3代,以老熟幼虫在粗皮裂缝、翘皮下、树洞中、主干分枝及主枝分叉处的缝隙中结茧越冬。4月上旬,越冬幼虫陆续开始化蛹,5月中旬为越冬代成虫羽化高峰期,5月中下旬1代幼虫蛀果为害,7月中下旬为1代成虫羽化高峰期,7月中下旬至8月上旬为2代幼虫为害高峰期,9月中下旬出现不完整第3代幼虫。在甘肃张掖地区,6月中旬至7月上旬越冬代成虫和第1代成虫之间有一段明显的间断期,说明第1代苹果蠹蛾发生的趋势相对较为独立,世代重叠现象发生不重。

Biological characteristics and dynamics of the codling moth, Cydia pomonella in the Zhangye Area

Based on systematic survey,it was found that Cydia pomonella L.occurred 2-3 generations per year and the third generation was incomplete in Zhangye Area of Gansu Province.The fully grown larvae overwintered in thick barks or cracks of trees.The overwintering larvae began pupating during early April,and the peak of overwintering moth occurrence arrived during mid-May.The 1st generation larvae damaged fruits during mid-and late May,and the peak of the 1st generation moth appeared during mid-and late July.The 2nd generation larvae seriously bored into fruits from mid-and late July to early August.The incomplete third generation began emerging during mid-and late September.There was an obvious intermittence between the stages of overwintering moth and the 1st generation moth from mid-June to early July.The results showed that the 1st generation occurred relatively independently.