梨剑纹夜蛾Acronycta rumicis(Linnaeus)的幼虫主要为害梨、苹果,也为害桃、李、杏、山楂、杂草等,去年在湖口县流泗公社的5个大队普查虫情时,发现有5千余亩棉地均遭到梨剑纹夜蛾程度不同的为害,一般棉苗被害株率为0.30～0.56％,个别5.27％,以7月初—中旬为害最重。 一、为害情况 Pear larvae of the genus Acronycta rumicis (Linnaeus) are mainly pests of harmful pears and apples. Peach, plum, apricot, hawthorn, weeds and the like were also found. Last year, in the investigation of five calabash censuses by the Liusi commune in Hukou County, There are more than 5,000 acres of cotton fields were infected with the degree of pear larvae different levels of damage, the general cotton seedling strain rate was 0.30 ~ 0.56%, respectively, 5.27%, to early July - mid-most damaging. First, the damage situation