Preliminary studies on biological control of the Fusarium ear blight complex of wheat

被引:19
作者
Diamond, H [1 ]
Cooke, BM [1 ]
机构
[1] Univ Coll Dublin, Dept Environm Resource Management, Dublin 4, Ireland
关键词
Fusarium ear blight; biological control; wheat; pre-treatment; challenger; germination fluid;
D O I
10.1016/S0261-2194(02)00117-5
中图分类号
S3 [农学(农艺学)];
学科分类号
0901 ;
摘要
Pre-inoculation of wheat ears at anthesis in the glasshouse with two non-host pathogens and the cell-free germination fluids of three Fusarium ear blight pathogens resulted in significant reductions in disease development and severity caused by Fusarium culmorum, F avenaceum, F poae and Microdochium nivale. Ears pre-inoculated with Phoma betae and challenged with F culmorum showed over a 60% reduction in symptoms relative to the control treatment after 25 days. Over a 140% increase in incubation period relative to the control occurred when wheat ears pre-inoculated with Pythium ultimum were challenged with M. nivale, and a 75% increase in latent period occurred when ears pre-inoculated with M. nivale germination fluid were challenged with conidia of M. nivale. Although treatments did not significantly affect thousand grain weights, pre-inoculation of wheat ears with either P. ultimum or P. betae often resulted in a significant increase in number of grains per ear compared with equivalent germination fluid treatments, and a decrease in the level of Fusarium infection in harvested grain. Possible mechanisms for the observed effects are discussed. (C) 2002 Elsevier Science Ltd. All rights reserved.
引用
收藏
页码:99 / 107
页数:9
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