3种华枝(Sinophasma spp.)的化学防治简报

Chemical Control of Sinophasma spp.

为防治近年来经常爆发危害的食叶害虫斑腿华枝虫（ＳｉｎｏｐｈａｓｍａｍａｃｕｌｉｃｒｕｒａｌｉｓＣｈｅｎ）、广华枝虫（Ｓ．ｌａｒｇｕｍＣｈｅｎｅｔＣｈｅｎ）和拟异尾华枝虫（Ｓ．ｐｓｅｕｄｏｍｉｒａｂｉｌｅＣｈｅｎｅｔＣｈｅｎ），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。

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.