二种稻飞虱对寄主及氮肥、密度适应性的比较研究

本试验采用二因素最优设计，研究了白背飞虱Sogatellafurcifera（Horvath）]和褐飞虱Nilaparvatalugens(Stal）]的种群数量同栽插密度及施氮水平的关系，并考察了它们对寄主品种的适应性。结果表明：二种飞虱对寄主品种的适应性除受到品种自身特性的影响外，还随寄主生育状况及管理水平对田间小气候的影响而变化，表现出时间状态的差异；并得出了二种稻飞虱种群数量同施氮水平和栽插密度关系的回归方程。

Study on Two Rice Hoppers for Adaptability of Host,Nitrogenous Fertilizer and Density

The experiment was applied the optimum design of two factors,the population density of Sogatella furcifera and Nilaparvata lugens,the influence on plant density and apply nitrogenous fertilizer level were studied.In addition,inspected the adaptability of host species to the hoppers.The results showed that the adaptability was effected not only selfcharacteristic of the host,but also the administrative status and sma11 climate,In the meanwhile the deviation changed during different times.At last,the relationship of the rice hoppers population density, nitrogenous fertilizer and density was indicated by the relative equation.