Field Trials of Different Insecticides to the Larvae of Lissorhoptrus oryzophilus Kuschel
HE Yong-fu1,LIAO Guo-hui1,YUAN Jie1,CHEN Xiao-jun1,LI Feng-liang1,CHENG Ying1, JIANG Zhao-chun2,HU Ji-feng3,ZHANG Zhong-min2(1.Institute of Plant Protection,Guiyang 550006,China;2.Station of Plant Protection and Quarantine,Guiyang 550002,China;3.Huaxi Station of Plant Protection and Quarantine,Guiyang 550025,China)
[Aims]In 2010,Lissorhoptrus oryzophilus Kuschel,a kind of quarantine pest,did harm to the rice area in central Guizhou Province.Field trials of 3 kinds of insecticides at different concentration were carried out to prevent L.oryzophilus.[Results]On 15th day after treatment,the control effect of carbosulfan 5% granules 2250,1875,1500 g a.i./ha,imidacloprid·chlorpyrifos 22% EC 660 g a.i./ha,and chlorantraniliprole·thiamethoxam 40% WG 150 g a.i./ha were all above 65%.[Conclusions]Carbosulfan 5% granules can be used as main agent to prevent L.oryzophilus,while imidacloprid·chlorpyrifos 22% EC and insect chlorantraniliprole·thiamethoxam 40% WG,their doses must be increased to 660 and 150 g a.i./ha respectively,so it's better to use them alternately.