【摘要】 对我国黑龙江、吉林、山西及河南等地的8个大豆孢囊线虫(Heterodera glycinesIchiohe)上样进行分析,50%以上的孢囊被寄生或具有生理病害,对分离出的150余个真菌进行初步研究,共鉴定出15个属真菌,其中以 Cylindrocarpon spp.,Glomus spp.,Fusariumsolani,Paecilomyces lilacinus,Phoma spp.,Stagnospora heteroderoe 和 Vertici-llium chlamydosporium 出现频率较高。调查中发现大豆连作使孢囊上真菌的种类简单化,而每种真菌的寄生率增加,还发现大豆孢囊线虫病具有自然衰退现象,即在大豆连作5年以上时,大豆孢囊线虫病减轻,大豆产量增加。更多还原

【Abstract】 Eight soil samples of soybean cyst-nematode from Heilongjiang, Jilin,Henan and Shanxi provinces were collected,and the fungi form the nematode cysts in the collected samples were isolated and identified.The results showed that more than 50~ of cysts were diseased or infected by some fungi.Among 150 isolates 15 genera were identified in which Cylindrocarpon spp.,Glomus spp.,Fusarium solani,Paecilomyees lilaeinus,Phoma spp.,Staynospora heteroderae and Verticillium chlamydosporium were the most common species.The members in the cyst-parasites became simplified year after year under the continuous cropping system while the frequency of the existing fungus speciec increased significantly under such cropping system.The decreace of severity of the nematode disease and the increace of the yield of soybean under the monocultural system of soybean crop for more than 5 years in certain localities were observed.更多还原