黑龙江省甜菜象虫发生及防治研究

1979～1981年研究了黑龙江省为害甜菜的象虫种类有甜菜长柄象、蒙古土象、甜菜象、二斑尖眼象、三北甜菜象、黑斜纹象、锥喙筒喙象、甜菜毛足象及甜菜碗额象等9种,其中甜菜长柄象和蒙古土象为优势种。40%甲胺磷乳油500～800倍液喷洒幼苗,杀虫率80～95%;用“3911”闷种对防治甜菜象虫有较高的效果,可挽回甜菜块根产量11～25%。

A STUDY ON THE OCCURRENCE AND CONTROL OF RUSSELKAEFER IN HEILONGJIANG PROVINCE

In the years 1979~1981,strains of Russelkaefer were investigated in the sugarbeet fields in Heilongjiang province.These are:Mesagroicus sp., Xylinophorus mongolicus Faust,Bothynoderes punctiventris Germar,Bothynodete seurus Faust,Chromonotus bipunctatus Zoubkoff,Chromoderus declivis Oirier,Lixus fairmairei Faust,Chromonotus bipunctatus fr. humeralis Zoubkoff.,Gronops sp.,Phacephorus umbratus Faldermann.Among them,Mesugroicus sp. and Xylinophorus mongolicus Faust were predominant.A 80~95% kill was obtained with 1 kg.of 40% Methamidophos to 500~800 1.of water as seedling spray.Seeds treated with Phorate before planting gave higher effectiveness and increased the root yield 11~25%.