Characterisation of Fusarium graminearum and F. culmorum isolates by mycotoxin production and aggressiveness to wheat

被引：3
|
作者：
Muthomi J.W. [1 ]
Dehne H.W. [2 ]
Oerke E.C. [2 ]
Mutitu E.W. [1 ]
Hindorf H. [2 ]
机构：
[1] Dept. of Crop Protection, University of Nairobi, Nairobi
[2] Inst. f. Pflanzenkrankheiten, Universität Bonn, D-53115 Bonn
来源：
Mycotoxin Research | 2000年 / 16卷 / Suppl 1期
关键词：
Graminearum; Fusarium Head Blight; Deoxynivalenol; Tebuconazole; Prochloraz;
D O I：
10.1007/BF02942980
中图分类号：
学科分类号：
摘要：
A total of 27 Fusarium culmorum isolates from Germany and 41 F. graminearum isolates from Kenya were investigated for aggressiveness and mycotoxin production on wheat ears. In addition, ergosterol content of the kernels from ears inoculated with F. graminearum was determined and the F. culmorum isolates were tested for mycotoxin production in vitro. For both pathogens, isolates markedly differed in aggressiveness. 59% and 37% of the F. culmorum isolates produced NIV and DON, respectively, in vivo and in vitro. The DON-producing isolates also produced 3-acDON in vitro. The more aggressive isolates produced mainly DON while the less aggressive isolates produced mainly NIV. 12% and 85% of the F. graminearum isolates produced NIV and DON, respectively. The highly aggressive isolates produced higher amounts of DON, aggressiveness being highly correlated to DON content in the kernels. NIV-producing isolates were less aggressive. Ergosterol content of kernels was moderately correlated to aggressiveness but highly correlated to DON content. Disease severity was associated with kernel weight reduction.
引用
收藏
页码：50 / 53
页数：3
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