甘肃酒泉苹果蠹蛾的发生规律

苹果蠹蛾Cydia pomonella(L.)是我国重要的果树害虫和检疫对象。本文通过田间调查和性诱芯诱捕器诱捕的方法,研究了2008年苹果蠹蛾在甘肃酒泉的年发生规律和空间分布特性。结果表明,苹果蠹蛾在我国甘肃酒泉1年发生2代;越冬代和第1代成虫发生高峰期分别为5月上旬至中旬和7月上旬至中旬,成虫在树冠的中层、向阳的方向(东部和南部)、果实和叶背面产卵较多;幼虫发生的两次高峰分别发生在6月17日和7月26日,刚孵化幼虫很快蛀果隐蔽为害,给防治带来很大困难;幼虫化蛹前,主要从树的上部向下爬行,并常以老熟幼虫潜入树干或分枝的树皮下结茧化蛹或越冬,次年4月中下旬开始羽化。

Occurrence dynamics of Cydia pomonella in Jiuquan

The codling moth,Cydia pomonella （ L. ） （ Lepidoptera：Olethreutidae）,is a serious pest in fruit orchards worldwide and one of the most important pests in China. The bionomics and population dynamics of codling moths in a pear orchard in Jiuquan,Gansu Province,were investigated by field surveys and sex pheromone dispenser trapping. The results show that codling moths at this site produced two generations each year. The peak of adult abundance was in early to mid May and early to mid July. Preferred oviposition sites were the upper canopy,the eastern and southern aspects of trees,and on fruits and the reverse side of leaves. The peak of abundance of two generations of eggs occurred on June 17 and July 26. Shortly after hatching, neonate larvae bored into fruit and remained there throughout their feeding stages,making them very difficult to control during this stage of their development. Codling moths overwintered as mature larvae inside cocoons under the bark of tree trunks or branches and emerged in mid to late April the following year.