Differences between spring wheat cultivars in tolerance to <Emphasis Type="Italic">Fusarium</Emphasis> seedling blight under organic field conditions |
| |
Authors: | Bart G H Timmermans Aart M Osman GeertJan H M Van der Burgt |
| |
Institution: | (1) Department of Agriculture, Louis Bolk Institute, Hoofdstraat 24, 3972 LA Driebergen, The Netherlands |
| |
Abstract: | Use of Fusarium-infected seed for cereal crops results in a reduced plant density due to seedling blight. This is especially a problem in
organic agriculture, for which currently no practical seed disinfection methods are available. In the present paper we investigated
whether spring wheat cultivars differ in tolerance to seedling blight in vivo, whether the possible differences could be linked to cultivar differences in initial growth rates, and whether differences
in weed infestation were related to differences in emergence. Seed six spring wheat cultivars (Melon, Lavett, SW Kungsjett,
Epos, Pasteur, Thasos), containing three Fusarium infection levels were obtained and sown in two field experiments in 2006 and 2007 and in an outdoor pot experiment in 2007.
Results indicated that the six spring wheat cultivars differed in their tolerance to seedling blight, and consequently in
the percentage of emergence of their seeds. The relative levels of tolerance to seedling blight of the six cultivars were
robust in the three experiments performed. No clear relationship between initial growth rates and tolerance was found. In
our experiments, no early and homogenous weed pressure was present, but in the 2007 field experiment a relationship between
initial seedling emergence and weed infestation after anthesis was determined. Based on the presented results we suggest that
additional to resistance to Fusarium head blight (FHB), differences in tolerance to seedling blight should also be considered
during selection of wheat cultivars for organic agriculture. |
| |
Keywords: | |
本文献已被 SpringerLink 等数据库收录! |
|