【摘要】 对 345份采自安徽凤阳、蒙城、定远等地的水稻立枯病病样进行了分离 ,获得了 5 8个致病的镰刀菌单孢株系 ,经鉴定为 6个种 ,其中以串珠镰刀菌比例最大 ,占 6 0 .35 % ,砖红镰刀菌、尖孢镰刀菌、茄类镰刀菌、半裸镰刀菌、多隔镰刀菌所占比例分别为 10 .35 %、13.79%、5 .17%、6 .90 %和 3.45 %。致病力测定结果表明串珠镰刀菌的致病力最强 ;病菌在根中部和根基部的侵染发病率高于根尖和茎基部。不同培养液培养镰刀菌的滤液可以引起相同或更严重的症状更多还原

【Abstract】 Fifty eight single spore isolations, from 354 samples of rice seedling blight in dry raised nursery, have been identified as six species of Fusarium according to their asexual stages. Isolations of F.moniliforme were majority,with the rate of 60.35%; the isolations of F. solani, F.oxysporum, F. semitectum, F.lateritium and F. decemcellulare were 5 17%, 13 79%, 6.90%, 10.35% and 3.45%, respectively.The result of inoculation showed that F.moniliforme had the highest pathogenicity. The percentage infected by pathogenic Fusarium from middle and base of root was higher than that from tip of root and base of stem. 6-8 day seedling of rice was the most sensitive to pathogenic Fusarium. The rice seedlings treated with filtrations of different liquids inoculating Fusarium could produce the same or more serious symptoms of blight.更多还原