【摘要】 从水稻旱育秧病苗上分离到 6 7个菌株 ,经鉴定分属于镰刀菌 5 8个、腐霉菌 7个、丝核菌 2个。经回接测定其致病性 ,结果表明致病的镰刀菌主要是串珠镰刀菌 (Fusariummoniliforme) ;腐霉菌中主要是盐腐霉 (Pythiumsalinum)、间生腐霉 (P .interedium)和顶生腐霉 (P .acrogenum ) ;丝核菌为立枯丝核菌 (Rhizoctoniasolani)。接种试验表明串珠镰刀菌在 6～ 8d龄幼苗的根中部侵染发病率最高 ,腐霉菌和丝核菌在一叶一心期茎基部侵染发病率最高。药剂试验表明以浸种灵 (二硫氰基甲烷 )、土菌消 (hymexazol)、甲霜灵 (metalaxyl)等种子处理加土壤处理 ,防效优于单独种子处理或土壤处理。更多还原

【Abstract】 67 samples were isolated from the dry-raised rice seedbed and then were identified. The results showed that 58 of them were Fusarium, 7 were Pythium and 2 were Rhizoctonia. Their pathogenicity was tested by back-infection, which indicated that pathogens were Fusarium moniliforme, Pythium salinum, P. interedium, P. acrogenum and Rhizoctonia solani. The results also showed that the infection percentage by Fusarium spp. was the highest in the middle of 6-8 days’ rice seedling roots, and the highest in the base of roots infected by Pythium spp. and Rhizoctonia spp. during single leaf stage. The results of chemical control showed that seed treatment combined with soil treatment by Jinzhongling (diisothiocyanatomethant), hymexaxol or metalaxyl were more effective than seed or soil treatments alone.更多还原