【目的】 为阐明刺激和抑制灰飞虱Laodelphax striatellus生殖的药剂混合或先后使用对灰飞虱生殖的效应。【方法】 本研究选用抑制灰飞虱生殖的井冈霉素和刺激生殖的多菌灵和三唑磷3种药剂，设置井冈霉素+多菌灵（JGM+CBM）混合药剂、井冈霉素+多菌灵先后（JGM+CBM先后）喷施药剂、井冈霉素+三唑磷（JGM+TZP）混合药剂和井冈霉素+三唑磷先后（JGM+TZP先后）喷施药剂处理灰飞虱3龄若虫，先后处理药剂喷施间隔时间为48 h，混合处理的2种药剂连续喷施。待成虫羽化后，测定成虫的产卵量、产卵前期、产卵历期、雌虫寿命、雌虫体重、雌虫体长、产卵瓣长度、卵巢蛋白含量和甘油三酯含量。【结果】 与不喷施药剂的对照相比，井冈霉素+多菌灵混合处理后灰飞虱的产卵量、产卵历期、雌虫寿命、雌虫体重、产卵瓣长度、卵巢蛋白含量和甘油三酯含量分别增加了28.9%、29.5%、19.1%、34.6%、35.2%、20.0%和30.4%，而产卵前期和雌虫体长与对照无显著差异；井冈霉素+多菌灵先后处理后，灰飞虱的产卵量、产卵前期、产卵历期、卵巢蛋白含量和甘油三酯含量分别下降了23.3%、28.9%、18.6%、12.1%和15.0%，雌虫寿命、雌虫体重、雌虫体长和产卵瓣长度无显著影响。井冈霉素+三唑磷混合处理后，灰飞虱产卵量、产卵前期、雌虫体重、雌虫体长、卵巢蛋白含量和甘油三酯含量分别下降了57.4%，56.5%、8.5%、21.4%、33.8%和26.2%，产卵历期、雌虫寿命和产卵瓣长度无显著差异；井冈霉素+三唑磷先后处理后，灰飞虱的产卵量、产卵前期、产卵历期、雌虫体重、雌虫体长、产卵瓣长度、卵巢蛋白含量和甘油三酯含量分别下降了19.6%、79.7%、32.6%、7.2%、14.8%、7.6%、   31.5%和36.8%，但对雌虫寿命无显著影响。【结论】 刺激灰飞虱生殖的药剂与抑制灰飞虱生殖的药剂混喷或先后喷施对生殖产生不同的效果。本研究结果对多种药剂混合使用避免飞虱发生再猖獗具有重要参考意义。

[Objectives]  The purpose of this study was to investigate the effects of simultaneous, or sequential, application of two insecticides on the reproduction of the Grey planthopper, L. striatellus. [Methods]  Jinggangmycin inhibits reproduction in the Grey planthopper, whereas Carbendazim and Triazophos stimulate reproduction. Third instar nymphs sprayed with either Jinggangmycin & Carbendazim (JGM and CBM), Jinggangmycin followed by Carbendazim (JGM + CBM), Jinggangmycin and Triazophos (JGM and TZP), or Jinggangmycin followed by Triazophos (JGM + TZP). The interval between successive pesticide applications was 48 h. After adult eclosion, female fecundity, preoviposition period, oviposition duration, female lifespan, female weight, female body length, oviposition valve length, ovarian protein content and triglyceride content, were measured. [Results]  Compared to the control group, the female fecundity, oviposition duration, female lifespan, female body weight, ovipositor valve length, ovarian protein content and triglyceride content of the JGM and CBM group increased by 28.9%, 29.5%, 19.1%, 34.6%, 35.2%, 20.0% and 30.4%, respectively. There was, however, no significant difference in the pre- and post-oviposition body length of adult females. The JGM + CBM treatment group had significantly lower female fecundity, pre-oviposition period, oviposition duration, ovarian protein content and triglyceride content values than the control group (23.3%, 28.9%, 18.6%, 12.1% and 15.0%, respectively), but there was no significant difference in female longevity, female weight, female body length or oviposition valve length. The JGM and TZP treatment group had significantly lower female fecundity, female body weight, female body length, ovarian protein content, triglyceride content and a shorter pre-oviposition period (57.4%, 8.5%, 21.4%, 33.8%, 26.2% and 56.5%, respectively) than the control group. There was, however, no significant difference in oviposition duration, female longevity and ovipositor valve length. The JGM and TZP treatment group also had significantly lower female fecundity, oviposition duration, female body weight, female body length, ovipositor valve length, ovarian protein content, triglyceride content and pre-oviposition period values (19.6%, 32.6%, 7.2%, 14.8%, 7.6%, 31.5%, 36.8% and 79.7%, respectively) than the control group. There was, however, no significant difference in female life span. [Conclusion]  Spraying paired combinations of Jinggangmycin, Carbendazim and Triazophos, simultaneously or sequentially, had significant, different effects on reproductive parameters of the grey planthopper. These findings provide useful information for avoiding a resurgence of this pest following the application of different pesticides.