An expert system on Erysiphe identification has been built in the microcomputer based on the data base which characters Erysiphe.All programs were written in Foxbase.The system runs quickly and gives the multiple judge including Fuzzy diagnosis according to the comparative results.The building of data base and the sample identifying were arranged into a systematic unit,so that users can get detail information about the taxonomic characters and the statistics of Erysiphe from this system to enhance their ide...