亚致死浓度吡蚜酮对黑肩绿盲蝽子代的影响. (Chinese)

Sublethal effects of pymetrozine on the offspring of Cyrtorhinus lividipennis (Hemiptera: Miridae). (English)

[Objectives] To determine the effects of sublethal concentrations of pymetrozine, which is widely used to control planthoppers in rice fields, on the offspring of Cyrtorhinus lividipennis, a natural enemy of brown planthopper (Nilaparvata lugens Stål, BPH). [Methods] The filter membrane method was used to treat C. lividipennis nymphs with a sublethal dose LC20 of pymetrozine. The tendency of nymphs to orientate towards rice plants infested with N. lugens eggs, their predation rate, fertility, longevity, and the relative expression of Vg (vitellogenin) in offspring treated with sublethal concentrations of pymetrozine, were measured. [Results] The selectivity of C. lividipennis for rice plants damaged by N. lugens vs healthy rice plants, adult longevity, fecundity and the relative expression of Vg in offspring, were not significantly affected by exposure to sublethal concentrations of pymetrozine. When the density of N. lugens was high, the predatory capacity of the offspring of the ♀Pymetrozine×♂Pymetrozine treatment group significantly increased to 20.4 % and 28.9 % higher than that of the ♀Control×♂Pymetrozine treatment and control (♀Control×♂Control) groups, respectively. [Conclusion] Exposure to a sublethal dose of pymetrozine has no adverse effect of on reproduction and longevity of the offspring of C. lividipennis. In fact, a sublethal concentration of pymetrozine actually increased the capacity of offspring to prey on N. lugens. These results lay benefit the development of sustainable, integrated, control strategies for N. lugens incorporating both chemical and biological control in rice fields. [ABSTRACT FROM AUTHOR]

【目的】 吡蚜酮广泛应用于稻田飞虱的防治, 本文旨在研究亚致死浓度吡蚜酮对褐飞虱天敌黑 肩绿盲蝽子代的影响, 评价吡蚜酮对黑肩绿盲蝽的安全性。【方法】 试验采用滤膜法, 以亚致死剂量LC20 处理黑肩绿盲蝽若虫, 待其羽化后, 评价4 组交配组合（♀Control×♂Control、♀Pymetrozine×♂Control、♀Control× ♂Pymetrozine、♀Pymetrozine×♂Pymetrozine）产生的子代在对水稻植株选择行为、捕食量、生殖力、成虫寿命等方面 的变化。【结果】 亚致死浓度吡蚜酮处理对黑肩绿盲蝽子代在褐飞虱危害的水稻植株和健康水稻植株之间 的选择性、成虫寿命、生殖力及卵黄原蛋白的相对表达量无明显影响;褐飞虱密度较高时, ♀Pymetrozine× ♂Pymetrozine 处理组黑肩绿盲蝽子代的捕食量显著增加, 较♀Control×♂Pymetrozine 处理组及♀Control×♂Control 对照组 分别高20.4%、28.9%。【结论】 本实验未发现吡蚜酮对黑肩绿盲蝽子代具有生殖和寿命等方面的不利的 亚致死效应, 且亚致死浓度吡蚜酮处理在一定程度上会增加黑肩绿盲蝽子代的捕食能力以及对褐飞虱的控 害效能, 本研究结果对研发稻田化学防治与生物防治相协调的可持续性综合防控策略具有一定指导的意义. [ABSTRACT FROM AUTHOR]

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