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作者就褐稻虱在水稻扬花后对米粒灌浆的影响进行定量研究。结果表明,米粒干物质的累积量与扬花后的天数呈极显著的logistic曲线关系。干物质积累总量、起始增长势、干物质积累旺盛期以及最大日增量均与褐稻虱虫量呈极显著的负相关。仅占籽粒充实总日数38.6％的灌浆盛期中,积累的干物质重为成熟时籽粒干重的65.84％,这是决定稻谷千粒重的关键时期。在孕穗末期到齐穗后的20d内,应尽可能地将褐稻虱种群控制到最低水平,孕穗末期在使用高活性药剂扑虱灵、吡虫啉时,用药有效剂量需确保控制效果30～35d,可获得最大的经济效益。
The authors quantitatively studied the effects of brown planthopper on rice grain filling after flowering of rice. The results showed that there was a very significant logistic curve between the cumulative amount of dry matter and the days after flowering. Total dry matter accumulation, initial growth potential, dry matter accumulation and maximum daily gain were significantly and negatively correlated with the amount of brown planthopper. In the filling period accounting for only 38.6% of the total number of grain filling, the accumulated dry matter weight was 65.84% of the dry weight of the grain at maturity, which is the key period for determining the 1000-grain weight of rice. In the late booting period to within 20d after heading, the brown planthopper population should be controlled to the lowest possible level. When using the high active pharmaceuticals buprenorphine and imidacloprid in the booting stage, the effective dosage should ensure the control effect for 30-35 days, Can get the most economic benefits.