Abstract:The effect of coating seeds with Seed-coatted No.1 to the control of bakanae disease anddamping off of rice seedlings is remarkable. The result of field trial in 1989 and 1990 showed:the efficieneies for the control of bakanae disease and damping off of rice seedlings with 0.3% Seed-coatted No.1 of seed weight were 93.9% and 96.5% separately, higher than that with Ermiaoting and Dexon. Recently many contries use soild acidification, seed soaking in Fungicide and soil treatment to control this two diseases. But these methods are costy, complicated and difficult for farmers to master, so that the two diseases are still severe.Using Seed-coatted No.1 to control these two diseases can reduce the doseand environmental pollution. It is economical, safe and convenient and the effect is remarkable.