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本研究旨在为褐飞虱为害损失的调查提供直观、准确的参考依据。研究表明，褐飞虱各种田间受害状都有产量损失，各症状的产量损失率为２５．８％～９４．０％。以百穗实粒干重为统计标准，Ｆ＝１８８．７０４＊＊，达极显著差异水平。ＳＳＲ多重比较，不同水稻被害状之间损失梯度明显。产量因素剖析表明，褐飞虱的为害主要是导致结实率和千粒重显著降低。文中举例说明了研究结果的应用方法。
The purpose of this study is to provide a direct and accurate reference for the investigation of the loss of Nilaparvata lugens (Nilaparvata lugens). Studies have shown that all the brown planthopper in the field suffered from yield loss, the yield loss rate of each symptom was 25.8% ~ 94.0%. In terms of dry weight of spikelets, F = 188.704 **, reached a very significant level of difference. Multiple comparisons of SSR showed that the gradient of loss between different rice harms was obvious. The analysis of yield factors showed that the main damage caused by BPH was the decrease of seed setting rate and 1000-grain weight. The article illustrates the application of the research results.