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[目的]通过室内抗药性筛选,比较了朱砂叶螨对植物源杀螨活性物质东莨菪内酯和螺螨酯的抗性发展差异。[结果]在70%的选择压力下,筛选18代,朱砂叶螨对东莨菪内酯的抗性系数基本没有变化。同期,对螺螨酯的抗药性发展速度较快,在相同选择压力下,筛选至14代,抗性系数达18.88。b值分析表明:这一种群中出现了抗性杂合子,而且有增多的趋势。[结论]对进一步研究东莨菪内酯的杀螨作用机理及新型杀螨剂开发具有重要的理论指导意义。
[Objective] The research aimed to compare the resistance development of scopolalide and spirodiclofin, a plant-derived acaricidal active substance, in Tetranychus cinnabarinus through indoor resistance screening. [Result] Under the selection pressure of 70%, the resistance coefficient of scopoletin remained almost unchanged after 18 generations of selection. Over the same period, the development of the resistance of spirodiclofen quickly, under the same selection pressure, screening to 14 generations, the resistance coefficient of 18.88. b value analysis showed that: there is resistance heterozygotes in this population, and there is an increasing trend. [Conclusion] The study has important theoretical significance for further study on the mechanism of scopolactone acaricidal action and new acaricide development.