From 1996 to 1999,five rice blast characterization nurseries were established in the serious blast-infected areas at different latitudes and ecosystems to characterize and select varieties with durable resistance to blast.Of the 6000 accessions characterized,74 blast resistance accessions were selected including 56 japonica varieties, 18 indica varieties and 3 wild species.Tetep and Moroberekan were used as resistant check and B40 was used as sensitive check.Systematic analysis on data obtained from filed evaluation showed that Dabaigu (japonica),Haonongzao (indica),Haoyulang (indica) and wild rice (Oryza meyeriana (Zoll et Mor.)Baill)have durable resistance to rice blast.The wild rice has high resistance to Xanthomonas oryzae pv oryzicola and immune to Xanthomonas oryzae pv oryzae and has medium resistance to Magnaporthe geisea.It is suggested that a simple and fast method for screening rice verieties with durable resistance to Magnaporthe geisea in different ecosystem may be developed by using the number of spores and the types of lesion as the indicators.