The intra-and inter-specific relationship of Nilaparvata lugens (stl) and Sogatella furcifera (Horvath) on three rice varieties, Z852, XS11 and XY9308, were studied in the laboratory.

• 在室内条件下研究了褐飞虱、白背飞虱在3种类型水稻稻苗上的种内密度效应和种间互作效应。