三角坐标图法快速筛选农药三元复配剂的最佳配比  

Rapid Screen of Optimal Ratio with Ternary Mixtures of Pesticide Using Triangle-coordinate Figure

作　　者：杨振国[1] 谢道燕[1] 达爱斯[1] 倪婧[1] 罗雁婕[1] 

机构地区：[1]云南省农业科学院蚕桑蜜蜂研究所,云南蒙自661101

出　　处：《农药》2016年第5期347-349,358,共4页Agrochemicals

基　　金：云南省科技计划重点新产品项目(2015BB009);云南省农业科学院蚕桑蜜蜂研究所青年创新基金(QC2014003)

摘　　要：[目的]快速获得农药三元复配剂的最佳增效配比。[方法]采用三角坐标图法筛选丁醚脲-苯丁锡-溴虫腈三元复配对朱砂叶螨的最佳配比,并以共毒因子法和共毒系数法评价其增效程度。[结果]丁醚脲-苯丁锡-溴虫腈混剂的增效配方中的单剂含量分别为56%～63%、34%～63%及2%~～6%,其在三角坐标图中形成增效区域,在该区域内进一步评价各相邻配比混剂的毒力,其中配比(30/27/4.5)混剂对朱砂叶螨雌成螨处理后24 h的LC50值为30.53 mg/L,共毒系数为174.79,为该混剂的最佳配比。[结论]三角坐标图法直观反映增效配比区域,便于农药三元复配剂最佳配比的筛选。[Aims] This study aims to rapidly screen out the optimal ratio of ternary mixtures of pesticide. [Methods] The joint action of diafenthiuron, fenbutatin-oxide （FBO） and chlorfenapyr against Tetranychus cinnabarinus was bioassayed, and the synergism of the ternary mixture with optimal ratio was rapidly selected by triangle-coordinate figure method and means of co-toxicity factor and co-toxicity coefficient （CTC）. [Results] The results indicated that the synergism ratios of mixture were 56-63% of diafenthiuron and 34-63% of FBO mixed with 2-6% of chlorfenapyr. These ratios formed synergism area in triangle-coordinate figure. The best synergistic effect was found in the ratio group diafenthiuron/FBO/chlorfenapyr 30/27/4.5 for its CTC of 174.79 with a LC^o of 30.53 mg/L at 24 h post-treatment. [Conclusions] Triangle-coordinate figure directly reflects the synergism ratio of area, is convienent to screen out the optimal ratio of ternary mixtures of pesticide.

关 键 词：联合作用 农药 三元复配 三角坐标图 

分 类 号：S482[农业科学—农药学]