Phytopathology (2008) 98, 69-78

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X.-M. Xu, P. Nicholson, M.A. Thomsett, D. Simpson, B.M. Cooke, F.M. Doohan, J. Brennan, S. Monaghan, A. Moretti, G. Mule, L. Hornok, E. Beki, J. Tatnell, A. Ritieni and S.G. Edwards (2008)
Relationship between the fungal complex causing Fusarium head blight of wheat and environmental conditions
Phytopathology 98 (1), 69-78
Abstract: Over 4 years, the environmental conditions and the causal agents of Fusarium head blight (FHB) disease of wheat were determined in field sites in four European countries: Hungary, Ireland, Italy, and the United Kingdom. Polymerase chain reaction-based methods were used to detect each species causing FHB and quantify its DNA (as a measurement of fungal abundance) in the samples. Canonical correspondence analysis (CCA) was used to determine the relationship of the incidence and abundance of each species with weather variables. CCA indicated that little variability in the species prevalence data was explained by the weather variables. In contrast, a greater proportion of variability in abundance data was accounted for by the weather variables. Most samples contained two or more species and statistical analysis suggested that these species tended to coexist at field sites. CCA also indicated that there were differences in the relationships of the prevalence and abundance of the six FHB species with environmental variables. Fusarium poae was associated with relatively drier and warmer conditions, whereas F. graminearum was associated with warmer/humid conditions. F. avenaceum and F. culmorum were both associated with niches of cooler/wet/humid conditions. Two Microdochium species were associated with regions of relatively cool/moderate temperatures and frequent rainfalls of short duration. The results also suggested that environmental conditions differentially affect the infection and colonization processes, and the comparative abundance of the six species.
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Full text of article
Database assignments for author(s): Xiang Ming Xu, Paul Nicholson, Fiona M. Doohan, Simon G. Edwards

Research topic(s) for pests/diseases/weeds:
environment - cropping system/rotation

Pest and/or beneficial records:

Beneficial Pest/Disease/Weed Crop/Product Country Quarant.

Fusarium poae Wheat (Triticum) Hungary
Fusarium poae Wheat (Triticum) Ireland
Fusarium poae Wheat (Triticum) Italy
Fusarium poae Wheat (Triticum) United Kingdom
Fusarium culmorum Wheat (Triticum) Hungary
Fusarium culmorum Wheat (Triticum) Ireland
Fusarium culmorum Wheat (Triticum) Italy
Fusarium culmorum Wheat (Triticum) United Kingdom
Fusarium avenaceum Wheat (Triticum) Hungary
Fusarium avenaceum Wheat (Triticum) Ireland
Fusarium avenaceum Wheat (Triticum) Italy
Fusarium avenaceum Wheat (Triticum) United Kingdom
Fusarium graminearum Wheat (Triticum) Hungary
Fusarium graminearum Wheat (Triticum) Ireland
Fusarium graminearum Wheat (Triticum) Italy
Fusarium graminearum Wheat (Triticum) United Kingdom
Microdochium nivale Wheat (Triticum) Hungary
Microdochium nivale Wheat (Triticum) Ireland
Microdochium nivale Wheat (Triticum) Italy
Microdochium nivale Wheat (Triticum) United Kingdom
Microdochium majus Wheat (Triticum) Hungary
Microdochium majus Wheat (Triticum) Ireland
Microdochium majus Wheat (Triticum) Italy
Microdochium majus Wheat (Triticum) United Kingdom