本文报道了我国玉米上的一种新病害玉米顶腐病,是由串珠镰孢亚粘团变种(Fusarium moniliforme var.subglutinans Wr.&Reink)侵染所致。人工接种玉米后表现与田间自然发病症状一致,除侵染玉米外,尚能侵染高粱、苏丹草、谷子、小麦、水稻、珍珠粟等禾本科作物引起顶腐病,并可侵染狗尾草和马唐草等植物。病菌生长的适宜温度25~30℃,最适为28℃;大、小2型分生孢子萌发适宜温度均为25~30℃。木糖、葡萄糖、蔗糖、乳糖、半乳糖和菊糖均是病菌生长的良好碳源。适宜病菌生长的培养基为Richard's、PDA、PSA、玉米粉和燕麦片培养基。田间发病程度因地势而异,低洼易涝地和园田地发病重、坡地和高岗地发病轻。

The newly occurred corn disease, top rot of corn,caused by Fusarium moniliforme var. subglutinans Wr. & Reink was studied. The pathogen could infect corn, sorghum, sudan grass, columbus grass, foxtail millet, wheat, rice, pearl millet, water grass and crabgrass. The optimum temperature for the pathogen growth in culture was 25-30℃ and was 25-30℃for germination of both microconidia and macroconidia. The fungus grew well when xylose, sucrose, lactose, galactose and inulin was used as carbon sources. Many mediums such as Richard's, PDA, PSA, cornmeal agar, and oatmeal agar were good for the pathogen growth. The incidence of disease was different under different soil conditions and more plants were infected in lowland and garden soil.