巴沙和马拉硫磷对两种储粮害虫成虫的毒力测定  

TOXICITY ASSAY OF BASSA AND MALATHION TO SITOPHILUS ORYZAE AND TRIBOLIUM CASTANEUM

作　　者：罗来凌 刘伟强 田世尧[2] 杨森辉 赖志勇 

机构地区：[1]广州市粮食科研所,广州510100 [2]仲恺农业技术学院植保系

出　　处：《粮食储藏》2002年第1期19-21,共3页Grain Storage

摘　　要：用 97%巴沙和 4 5 %马拉硫磷乳油对米象 (Sitophilusoryzae)和赤拟谷盗 (Triboliumcastaneum)作毒力测定。根据结果求出巴沙和马拉硫磷处理米象成虫 72小时毒力回归方程 :巴沙为y =2 396 0x - 0 176 0 (r =0 9970 ) ,马拉硫磷为y =2 5 6 42x - 1 0 915 (r =0 985 8) ;巴沙LC50 为 14 4 6 2 99mg/L(95 %置信区间 12 7 7332～ 16 1 5 2 6 6mg/L) ,马拉硫磷LC50 为 2 37 4 5 35mg/L(95 %置信区间 2 0 6 2 0 6 8～ 2 6 8 70 0 3mg/L)。结果表明巴沙对供试米象的毒力比马拉硫磷大得多 。Toxicity assay of 97% bassa and 45% malathion oil to Sitophilus oryzae and Tribolium castaneum was carried out.The results showed that using bassa, the probability mortality regression lines and LC 50 of S.oryzae was y=2 3960x-0 1760(r=0 9970 and 144 6299mg/L(95% confidence interval:127 7332 to 161 5266mg/L),respectively.When using malathion,the probability mortality regression lines and LC 50 of S.oryzae was y=2 5642x-1 0915(r=0 9858) and 237 4535mg/L(95% confidence interval:206 2068 to 258 7003mg/L) respectively.It showed that the toxicity of bassa is much higher than malathion to S.oryzae in the test.In addition,a high resistance to bassa and malathion have been found in the strain of T.castaneum.

关 键 词：巴沙 巴拉硫磷 米象 赤拟谷盗 毒力测定 储粮害虫 杀虫剂 

分 类 号：S379.5[农业科学—农产品加工] S482.8[农业科学—农艺学]