Effect of host and inoculum patterns on take-all disease of wheat incidence, severity and disease gradient
European Journal of Plant Pathology, ISSN: 0929-1873, Vol: 129, Issue: 1, Page: 119-131
2011
- 5Citations
- 13Captures
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Article Description
The importance of the spatial aspect of epidemics has been recognized from the outset of plant disease epidemiology. The objective of this study was to determine if the host spatial structure influenced the spatio-temporal development of take-all disease of wheat, depending on the inoculum spatial structure. Three sowing patterns of wheat (broadcast sowing, line sowing and sowing in hills) and three patterns of inoculum (uniform, aggregated and natural infestation) were tested in a field experiment, repeated over 2 years. Disease (severity, root disease incidence, plant disease incidence and, when applicable, line and hill incidences) was assessed seven times during the course of each season and the spatial pattern was characterized with incidence-incidence relationships. In the naturally infested plots, disease levels at all measurement scales were significantly higher in plots sown in hills, compared to plots sown in line, which were in turn significantly more diseased than plots with broadcast sowing. Disease aggregation within roots and plants was stronger in line and hill sowing than in broadcast sowing. Analysis of the disease gradient in the artificially infested plots showed that the disease intensified (local increase of disease level) more than it extensified (spatial spread of the disease), the effect of the introduced inoculum was reduced by 95% at a distance of 15 cm away from the point of infestation. Yield was not significantly affected by sowing pattern or artificial infestation. © 2010 KNPV.
Bibliographic Details
http://www.scopus.com/inward/record.url?partnerID=HzOxMe3b&scp=78649690136&origin=inward; http://dx.doi.org/10.1007/s10658-010-9700-3; http://link.springer.com/10.1007/s10658-010-9700-3; http://link.springer.com/content/pdf/10.1007/s10658-010-9700-3; http://link.springer.com/content/pdf/10.1007/s10658-010-9700-3.pdf; http://link.springer.com/article/10.1007/s10658-010-9700-3/fulltext.html; http://www.springerlink.com/index/10.1007/s10658-010-9700-3; http://www.springerlink.com/index/pdf/10.1007/s10658-010-9700-3; https://dx.doi.org/10.1007/s10658-010-9700-3; https://link.springer.com/article/10.1007/s10658-010-9700-3
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