simulation model of white-backed planthopper (WBPH)Sogatella furcifera (Horvath ),population dynamics on first season rice in Zhejiang province, China,was con-structed using field population data together with information from the documents。 In thispaper the model is described and its predictions are compared with independent sets of fielddata。 For nine data sets from 1983 to 1989.repersenting a 11-fold range of WBPH peak densi-ties,the time at the peak of the WBPH population was predicted within 5 da...