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试验结果表明,甘薯台龟甲幼虫对五爪金龙具有较强的取食力,取食力随着虫口密度的增加而增强。幼虫期的取食力(y)和投放1龄幼虫密度(x)的线性关系式为y=19.32+11.36x。每个叶片投放1龄幼虫2头,8d后取食力可达100%。甘薯台龟甲成虫对五爪金龙的取食力更为显著,每叶放虫1头,6d后取食量达100%,且取食力随着虫口密度的上升而提高。放虫后6d的取食力和成虫密度的对数关系式为y=51.09+120.67logx。成虫的投放密度达到1头/叶,6d后叶片就能100%被取食。
The results showed that the sweetpotato Tortoiseshell larvae had a strong feeding force on the Ipomoea cairica, and the feeding power increased with the increase of the population density. The linear relationship between the larval feeding (y) and the first instar larvae density (x) was y = 19.32 + 11.36x. Two first-instar larvae were fed on each leaf, and the feeding force could reach 100% after 8 days. Larvae tortoise shellfish feeding on the Ipomoea cairica more significant, each leaf pest repellent, 6d after the feeding amount of 100%, and feeding power increased with the population density increased. The logarithmic relationship between feeding power and adult density at 6 days after the release of pest was y = 51.09 + 120.67logx. Adult feeding density reached 1 head / leaf, 6 days after the leaves can be 100% were fed.