曲纹紫灰蝶(Chilades pandava.)属于鳞翅目灰蝶科食叶害虫,主要为害苏铁科植物。过去在广州、深圳等地为害严重,近10多年来,由于苏铁类的大范围北引和作为观叶植物盆栽,再加上气候变暖,在长江流域也较多发生。一般被害率达10～20%,重的达40%以上,新抽生的羽叶被产卵率达70%,一般虫口密度为30～40头/株,多的达100头/株。主要以幼虫群集蛀食苏铁新抽出的羽叶和叶轴,在2～3天内可将新羽叶吃得残缺不全或一扫而光,剩下破絮状的残渣、干枯叶柄和叶轴。若成虫将卵产于球花 Chirades pandava (Chilades pandava.) Leaf lepidopterous Lepidoptera pests, the main damage to cycads. In the past, serious damage was caused in places like Guangzhou and Shenzhen. In the past 10 years, due to the large scale northward induction of cycads and potted plants as foliage plants, coupled with the warming of the climate, more occurred in the Yangtze River basin. The average damage rate is 10-20%, and the weight is up to 40%. The newly hatched plume is spawned at 70%, and the population density is 30 ~ 40 heads per plant and the number is more than 100 per plant. Mainly in larvae cluster eaten young leaves of Su-fer leaves and leaf shaft, in 2 to 3 days can eat new plumage incomplete or swept away, leaving the broken floc residues, dry petiole and leaf shaft. If the adult eggs will be produced in the ball flowers