论文部分内容阅读
1982～1985年,在河南省主要玉米青枯病区(4县)采集病株标本,进行分离培养鉴定。所得菌株有镰刀菌(Fusarium link et Fr.)、丝核菌(Rhi-zoctonia DC.et Fr.)、长喙壳菌(Ceratocystis Ell.et Halst.)及长蠕孢菌(Helminthosporium link et Fr.)等。用出现频率高的镰刀菌进行室内外接种试验,进行致病性测定。致病力最强的是禾谷镰刀菌(Fusarium graminearumSchwabe.),其次是半裸镰刀菌(F.semitectum RerK.et Rav.),串珠镰刀菌中间变种(F.moniliforme var.jntermedium Neish et leggett)次之,尖孢镰刀菌(F.oxysporum Schle.)致病力最弱。其中半裸镰刀菌和串珠镰刀菌中间变种在玉米上首次发现,并对以上镰刀菌进行了生物学特性的研究。
From 1982 to 1985, the diseased strains were collected from the main corn wilt disease areas in Henan Province (4 counties), and were isolated and identified. The resulting strains are Fusarium link et Fr., Rhi-zoctonia DC.et Fr., Ceratocystis Ell. Et Halst., And Helminthosporium link et Fr. )Wait. With high frequency of Fusarium for indoor and outdoor inoculation test for pathogenicity determination. The most virulent were Fusarium graminearum Schwabe, followed by F. semitectum Rer. Et Rav., F. moniliforme var. Jntermedium Neish et leggett The pathogenicity of F.oxysporum Schle. Is the weakest. Among them, the half-naked Fusarium and Fusarium intermedium were found on maize for the first time, and the biological characteristics of Fusarium above were studied.