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′)。
出处
《安徽农业科学》
CAS
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
关键词
农药混剂
抗药性
适合度
最佳配比
Mixture of pesticide,Pesticide resistance,Fitness,Optimum proportion
