黄曲条跳甲的发生和防治

OCCURRENCE AND CONTROL OF STRIPED FLEA BEETIE(Phyllotreta vittata FABR)

黄曲条跳甲 Phyllotreta vittata Fabr 近年来在上海市郊区发生严重,主要危害十字花科蔬菜,影响蔬菜的品质和产量。田间调查表明,该害虫发生危害期为5～8月,高峰期为6月中下旬至7月中下旬。黄盆诱甲证实了这一论点。50%辛硫磷(Phoxim)乳油,48%乐斯本(Chlorpyrifos)乳油药后5d防效均达100%,7d 防效分别为71.9%和88.6%。80%敌敌畏(Dichlorvos)乳油和90%敌百虫(Trichlorphon)晶体防治该虫效果不佳。用调查破叶率的方法计算防治结果表明:90%Trichlorphon 晶体为60.0%;5%Phoxim 颗粒剂防效为56.4%。

Striped flea beetle that occurred severely in recent years injured mainly cru- ciferae vegetables and influenced quality and yield of the vegetables.Fluctuation investigation in field showed that the beetle occurred from May to August.The occurrence peak of the bee- tle is mainly from the middle or last ten days of June to the middle or last ten days of July. Number of the insects reduced obviously after the middle ten days of August.Meanwhile, numbers of yellow pan-trapped beetles showed that the beetles occurred mainly from the last ten days of May to the first ten days of August.The efficiencies of controlling the beetle by using 5% Phoxim EC and 48% Chlorpyrifos EC were all 100% five days after application, and were 71.9% and 88.6%,respectively seven days after application. The control efficiencies of 80% Dichlorovos EC and 90% Trichlophon were relatively low.Rates of broken leaves showed that control efficiencies of 90% Trichlorphon and 5% Phoxim G were 60% and 56.4%,respectively,five days after application.