阿拉尔地区香梨优斑螟成虫发生动态和昼夜活动节律

The population dynamics and circadian activity rhythm of Euzophera pyriella adults in Alaer

利用糖醋液诱集方法系统研究了香梨园香梨优斑螟成虫发生动态和昼夜活动节律。结果表明,香梨优斑螟在阿拉尔地区香梨园一年发生4代。越冬代成虫发生盛期为4月下旬,成虫活动时间为每日18:00至次日4:00,主要集中在20:00至次日0:00;第1代成虫发生盛期为6月中旬,第2代成虫发生盛期为7月下旬,第1、2代成虫活动时间为每日20:00至次日8:00,主要集中在22:00至次日0:00;第3代成虫发生盛期为8月中下旬,成虫活动时间为每日20:00至次日6:00,主要集中在22:00至次日0:00。

The population dynamics and the circadian rhythm of E.pyriella adults were systematically studied by using the sugar-vinegar trap.The results showed that E.pyriella had four generations a year in fragrant pear orchard of the Alaer region.The overwintering adults mainly emerged in late April.Their activity period was from 18:00 to 4:00 and exhibited peaks of activity during 20:00 to 0:00.The first generation adults mainly emerged in the middle of June,and the second generation adults were in late July.The activity period of the first and second generation adults was from 20:00 to 8:00,and peaked from 22:00 to 0:00.The third generation adults mainly emerged in mid-to late August.Their activity period was from 20:00 to 6:00 and exhibited peaks of activity from 22:00 to 0:00.