通过试验测定在武育粳2号上水稻拔节期正处于幼穗形成阶段，受褐稻虱危害实粒数减少，产量下降；孕穗期较耐褐稻虱危害，有明显的补偿作用；孕穗末期至灌浆初期为水稻受害最敏感的时期，危害后使结实率和千粒重均明显下降，水稻显著减产；灌浆后期至乳熟期受褐稻虱危害主要导致干粒重降低，且越接近成熟产量损失越低。 It was determined by experiment that the stage of panicle formation at the jointing stage of Wuyujing 2 was at the stage of panicle formation. The number of seedlings harbored by the brown planthopper decreased and the yield decreased. The booting stage was more tolerant to the brown planthopper, The most sensitive stage was the grain filling to the early filling stage, the seed setting rate and 1000-grain weight decreased significantly after the damage, and the yield of rice decreased significantly. The damage of brown planthopper from the late filling stage to the milky stage mainly resulted in the decrease of dry weight, Lower.