论文部分内容阅读
三化螟、稻纵卷叶螟和稻飞虱类是南方水稻的主要害虫，常在水稻生长中后期同时造成为害。网室接虫试验表明：水稻产量损失率与三种害虫的密度呈线性关系，回归方程式为：y＝0．0870＋032431x1＋0．5075x2＋0．1583x3。文中对多种病虫复合为害损失预测模型的一般形式及复合防治指标的应用进行了讨论。
Rice stem borer, rice leaf roller and planthopper are the main pests of southern rice, often in the late rice growth at the same time cause harm. The results showed that there was a linear relationship between the yield loss of rice and the density of three pests. The regression equation was: y = 0.0870 + 032431x1 + 0.5075x2 + 0.1583x3. In this paper, the general forms of the prediction models for the combined damage of pests and diseases and the application of composite control indexes are discussed.