农药混剂中单剂搭配和最佳配比选择研究  

A Preliminary Study on the Selection of Suitable Active Ingredients and their Optimum Proportion of a Pesticide Mixture

作　　者：叶正荷[1,2] 苏卫华[1,2] 王文相[1,2] 张功普 

机构地区：[1]安徽省农科院植保研究所 [2]舒城县植保站

出　　处：《安徽农业科学》1997年第3期246-248,274,共4页Journal of Anhui Agricultural Sciences

基　　金：安徽省农科院青年基金

摘　　要：针对农药混剂中单剂搭配和最佳配比选择的几种方法的片面性，从群体遗传学角度推导了靶标物对农药混剂的抗性选择模型，指出以抑制抗药性产生和发展为目的的农药混剂在单剂选择上应以ω·ω′≤ρ·ρ′为准；在防治敏感型靶标物时，为了避免抗药性的产生，其单剂配比应以等保存率时的剂量比为准（ρ＝ρ′）；在防治对单剂已产生抗性，且抗性表观型适合度不高的靶标物时，其单剂配比应以保存率等于适合度时的剂量比为准（ρ＝ω，ρ′＝ω′）。After several methods of selecting suitable active ingredients and their optimum proportions in a pesticide mixture analysed,a model of target organisms population dynamics under a pesticide mixture selecting pressure was derived from population genetics.The model showed that'ω·ω′≤ρ·ρ′' might be taken as the criterion when active ingredients in a mixture were chosen in order to prevent (or delay) target organisms from pesticide resistance development.When target organisms were sensitive species ,the proportion of active ingredients in a mixture might be at the dosage ratios which would bring equal surviving rate(ρ=ρ ′) in order to avoid pesticide resistant occurrences .In the case of resistant target organisms to singal ingredient with low phenomenal fitness,the active ingredient in a mixture might be at the dosage ratios which would lead to the surviving rate equal to the fitness(ρ=ω,ρ′=ω′)。

关 键 词：农药混剂 抗药性 适合度 最佳配比 

分 类 号：S482[农业科学—农药学] S481.4[农业科学—植物保护]