茶刺蛾的防治适期与防治指标  

Optimum control period and economic threshold of the tea slug moth,Iragoides fasciata

作　　者：唐美君[1] 郭华伟[1] 殷坤山[1] 肖强[1] 

机构地区：[1]中国农业科学院茶叶研究所,杭州310008

出　　处：《植物保护》2014年第3期183-186,共4页Plant Protection

基　　金：国家科技支撑计划项目(2011BAD01B02)

摘　　要：为了阐明茶刺蛾（Iragoides asciata Moore）幼虫的取食为害及生长发育特征,明确其防治适期和防治指标.通过室内饲养观察,测定了茶刺蛾各龄幼虫的取食量、体长、体宽及体重,按防治后挽回的损失与防治成本相等的方法估算了其在有机茶园的防治指标.结果表明整个幼虫期取食茶叶1.547 g/头,其中1～3龄的取食量极小,从4龄开始取食量逐渐增大,6、7龄的取食量分别占总取食量的19％和71.4％.幼虫体重随龄期增加而增长的趋势与取食量一致,从4龄起开始快速增长,至7龄时达到最高值0.157 g.为防止茶刺蛾暴发为害,应在取食量小的4龄前开展防治.有机茶园防治指标拟定为6头/m2.In order to confirm optimum control period and economic threshold of the tea slug moth,Iragoides fasciata,food consumption,body length and body weight of the larvae of the tea slug moth were investigated,and the economic threshold in organic tea garden was estimated according to the retrieved loss equal to the control cost.The result showed that the total food consumption was 1.547 g per head during larval development.The food consumption of 1 st and 2 nd instars is very few,but increased rapidly from 4th instars.The food consumption of 6th and 7th instars accounted for 19% and 71.4%,respectively.Body weight increased rapidly from 4th instars and reached the maximum of 0.167 g at the 7th instar.Therefore,in order to prevent the outbreak of the tea slug moth,control should be taken before the 4th instar and the economic threshold in organic tea garden is 6 heads/m2.

关 键 词：茶刺蛾 取食量 体长 体重 防治指标 

分 类 号：S435.711[农业科学—农业昆虫与害虫防治]