千屈菜一种新害虫——肾毒蛾

肾毒蛾Cifuna locuples Walker是2007年在武汉发现危害千屈菜(Lythrumsalicaria L.)的一种新害虫,幼虫能取食千屈菜叶片和花朵。室外观察和室内饲养结果表明,肾毒蛾在武汉市1年发生3代,以低龄幼虫越冬,次年3～4月开始为害。5月初越冬代成虫出现,6月下旬第1代成虫羽化,8月中旬第2代成虫羽化。成虫羽化1d后即可分多次产卵于叶背,卵粒数十几到两百多粒。幼虫有5龄,初孵幼虫群集为害,2龄以后分散取食,4～5龄取食量大。幼虫在叶背吐丝结稀疏的薄茧化蛹。

A new pest of Cifuna locuples damaging loosestrife, Lythrum salicaria

Cifuna locuples Walker as a new pest was found to damege loosestrife( Lythrum salicaria L. ) in Wuhan in 2007. The morphology, living habits, life cycle of C. locuples were studied based on field observation and indoor rearing. The results showed that C. locuples has 3 generations per year and overwinters as young larvae in Wuhan. The overwinterred larvae start to feed the loosestrife during March to April. The adults of 3 generations emerge in the early May, late June and mid-August respectively. The adults lay 10-200 eggs in batches on the back of leaves. The larva has five instars, and first instar larvae feed in aggregation. The matured larvae pupate on the back of leaves.