3种华枝虫(Sinophasma spp.)的化学防治简报

Chemical Control of Sinophasma spp.

关键词:  华枝虫  食叶害虫  化学防治

Key words:  Sinophasma  leaf-eating insect  chemical control

摘要:

为防治近年来经常爆发危害的食叶害虫斑腿华枝虫(Sinophasma maculicruralis Chen)、广华枝虫(S.largum Chen et Chen)和拟异尾华枝虫(S.pseudomirabile Chen et Chen),采用50%甲胺磷EC(4000×,2000×,1000×,500×,250×)、40%水胺硫磷EC(8000×,4000×,2000×,1000×,500×)、40%乐果EC(8000×,4000×,2000×,1000×,500×)和2.5%敌杀死EC(8000×,4000×,2000×,1000×,500×)进行室内浸叶法试验,清水作对照,用2.5%敌杀死粉剂进行田间试验。室内试验结果表明,2000×~1000×浓度的50%甲胺磷和40%水胺硫磷防效分别达到91.5%以上和94.3%以上。4000×~2000×浓度的40%乐果和2.5%敌杀死EC防效分别达到94.2%和94.3%以上。四种农药均对华枝虫有较好的防效,它们之间的防效差异不显著。田间喷施1%的2.5%敌杀死粉剂,2h后防效达50%~70%,24h后防效达95%以上。

Abstract:

Four insecticides which are 50% Tamarom (4000×,2000×,1000×,500×,250×)、40% Optunal (8000×,4000×,2000×,1000×,500×)、40% Roger (8000×,4000×,2000×,1000×,500×) and 2.5% Decis (8000×,4000×,2000×,1000×,500×) were applied to control Sinophasma with leaf-poisoned in Lab.Three kinds of leaf-eating insects of Sinophasma are S.maculicrualis Chen, S.largum Chen et Chen and S.pseudomirabile Chen et Chen,which occur recently in Bobai county,Guangxi.The results showed that the effects of 2000×~1000×of 50% Tamarom and 40% Optunal were more than 91.5% and 94.3%, respectively,4000×~2000×of 40% Roger and 2.5% Decis were more than 94.2% and 94.3%, respectively.The effects between tham are not significant. And effects is 50%~70% in 2h,and more than 95% in 24h after 1% mixture of 2.5% Decis spraying on Sinophasma in forestry yield.