摘要
1987～1989年,从辽宁省玉米茎腐病主要发生区采集典型病株,自茎基髓部取样以组织分离法分离纯化,并作病原菌鉴定和致病性测定。结果表明,以瓜果腐霉菌[Pythium aphanidermatum(Eds.)Fitzp.]和禾谷镰刀菌[Fuarium graminearum Schw.]分离频率较高,致病力也较强。两种菌混合接种未见有加重发病的趋势。串珠镰刀菌[F.moniliforme Sheld.]和木贼镰刀菌[F.equisetic(Cda.)Sacc.],也表现一定致病力,但分离频率不高。初步认为瓜果腐霉菌和禾谷镰刀菌是引起辽宁省玉米茎腐病的主要致病菌。
During 1987-1989, diseased plants were collected from several areas in Liaoning Province. Samples were taken from the centrum of infected basal stalk. All isolates were obtained by routine tissue isolation method and purified on PDA. On the basis of isolate identification and patho- genicity test,Pythium aphanidermatum and Fusarium graminearum appeared to be most frequent, and with strongest pathogenicity among all isolated fungi. No tendency of disease aggravation was found when two pathogens were inoculated together. However,F. moniliforme and F. equiseti, to some extent, could attack corn but their isolation frequency was very low .There- fore, P. aphanidermatum and F. graminearum were considered as the major pathogens which cause stalk rot of corn in Liaoning Province.
出处
《沈阳农业大学学报》
CAS
CSCD
1990年第3期214-218,共5页
Journal of Shenyang Agricultural University
关键词
玉米茎腐病
病原菌
辽宁
stalk rot of corn
pathogenicity test
Pythium a phanidermatum
Fusarium graminearum
