近年来，我市草莓种植面积不断扩大。随着种植年限的增加，重茬地块增多，菌源不断积累，草毒菌核病呈逐年加重的趋势。1998年一般田块病株率在50％左右，最高达95％以上，少数田块草莓植株成片枯死，直接经济损失在4成以上，严重影响了产量和品质，降低了经济效益，在一?.. In recent years, the city’s strawberry growing area continues to expand. With the increase of planting years, continuous cropping plots increased, bacterial sources continue to accumulate, grass toadstool nuclear disease showed a trend of increasing year by year. In 1998, the disease rate of common plots was about 50%, up to over 95%. A few plots of strawberry plants became dead and the direct economic loss was over 40%, seriously affecting the yield and quality and reducing the economic benefits. In one ? ..