作　　者： ; ; ; ; ;

机构地区： 西南大学

出　　处： 《农药》 2006年第5期316-319,共4页

摘　　要： 采用共毒系数法对复配剂的最优配比进行筛选可能会造成真正最优配比的漏筛,且工作量大,具有局限性。以朱砂叶螨、菜缢管蚜和亚洲玉米螟为试虫,分别对甲氰菊酯、阿维菌素、辛硫磷、啶虫脒、杀虫单、三唑磷、甲·阿、辛·啶和三·杀进行毒力测定并计算共毒系数Y。将甲氰菊酯、辛硫磷和三唑磷在各自复配剂有效成分中的质量分数k进行反正弦转换(X=arcsin(K)1/2),通过SPSS软件拟和K反正弦转换值与共毒系数的数学模型。甲·阿、辛·啶和三·杀的数学模型为Y1=-30179.08+769.24X1-4.8472X12;Y2=-22025.37+616.45X2-4.2513X22;Y3=-227.45+19.03X3-0.2304X32。对上述3个方程进行求导可得:Y1'=769.24-9.6944X1;Y2'=616.45-8.5026X2;Y3'=19.03-0.4608X3。令Y'=0,则有X1=79.34;X2=72.50;X3=41.30。将X1、X2和X3值分别代入各自的方程可以求得甲·阿、辛·啶和三·杀复配剂的最大共毒系数分别为340.09、321.36和165.50,将X1、X2和X3值代入X=arcsin(K)1/2中可以求得各单剂在复配剂有效成分中的质量分数K值,根据K值可以求得:甲氰菊酯和阿维菌素的最优配比为28∶1;辛硫磷和啶虫脒的最优配比为10∶1;三唑磷和杀虫单最优配比为7.7∶10。 Using a cotoxicity coefficient to screen for optimal proportions of compound mixtures can cause a failure to identify the true optimum value while requiring considerable effort. Tetranychus cinnabarinus （Boisd.）, Rhopalosiphum pseudobrassicae and Ostriniafurnacalis （Guenée） were used as target insect species to determine toxicity of abamectin, fenpropathrin, phoxim, acetamiprid, monosultap, triazophos, fenpropathrin-abamectin, triazophos-monosultap, and phoxim-acetamiprid, and to calculate their respective cotoxicity coefficients, Y. Reverse arcsin transforms （X=arcsin （K）^1/2） were computed for the weight fractions, K, of the active ingredients of abamectin, phoxim, and trizophos combinations. SPSS software was then used to establish mathematical model of cotoxicity coefficients and arcsine values. Mathematical models of fenpropathrin-abamectin, phoxim-acetamiprid, and triazophos-monosultap were Y1 =-30179.08＋769.24X1-4.8472X1^2, Y2=-22025.37＋616.45X2-4.2513X2^2,Y3=-227.45＋ 19.03X3-0.2304X3^2, respectively. The above equations were differentiated to yield Y1′=769.24-9.6944X1, Y2′=616.45-8.5026X2 Y3′=19.03-0.4608X3, respectively. If Y′=0, then X1=79.34, X2=72.50, X3=41.30. Plugging X1, X2, and X3 into their respective models, it was determined that the most significant cotoxicity coefficients of fenpropathrin-abamectin, phoxim-acetamiprid, and triazophos-monosultap were 340.09, 165.50, and 321.36, and the most significantly synergistic proportions were the combinations of 28 ： 1, 10 ： 1, and 7.7 ： 10, respectively.

关 键 词： 数学模型 共毒系数 复配 增效作用

领　　域： [化学工程]