苹果苹小卷叶蛾成虫发生规律的观察

为有效测报和防治苹小卷叶蛾,采用性诱剂诱集的方法,观察苹果苹小卷叶蛾成虫的发生消长动态。结果表明,在陕西省礼泉县苹果苹小卷叶蛾1年发生3~4代,越冬代成虫在5月上中旬开始羽化,每年各代成虫发生时间有一定的差异,有世代重叠现象;在苹果树高度为1.0~2.0 m范围内的不同位置,通过性诱剂诱集到的成虫数量存在一些差异,其中在苹果树离地1.5 m处分布的成虫数量最多,在实际生产中采用性诱剂对苹小卷叶蛾成虫进行诱杀时,可根据实际操作方便及效果最大化的原则,尽量将诱捕器放置在苹果树离地接近1.5 m高度的位置,以便获得更好诱捕效果;成虫活动时间主要在4:00—8:00时段,其中在4:00—6:00时段活动更频繁、更活跃。

Observation of the Adult Dynamics of Adoxophyes orana in Orchards

To forecast and control Adoxophyes orana efficiently, the adult dynamics of A. orana in orchards were observed by the method of sex attractant trapping. The results showed that A. orana had 3-4 generations per year in orchards, and the overwintering moth began emerging in early to mid-May. Each generation adult occurrence time was different every year, with generation overlapping. The number of trapped moths had certain difference at 1.0-2.0 m height of the apple tree. The number of the moths at 1.5 m height was the most. When the sex attractant was applied for trapping moths, sex attractants should be arranged near 1.5 m height of the apple tree in order to get better trapping effect. The moths mainly acted in 4:00-8:00, and the activities were more frequent and active in 4:00-6:00.