Variation in the effects of take-all disease on grain yield and quality of winter cereals in field experiments

A - Papers appearing in refereed journals

Gutteridge, R. J., Bateman, G. L. and Todd, A. D. 2003. Variation in the effects of take-all disease on grain yield and quality of winter cereals in field experiments. Pest Management Science. 59 (2), pp. 215-224.

AuthorsGutteridge, R. J., Bateman, G. L. and Todd, A. D.

Relationships between take-all intensity and grain yield and quality were determined in field experiments on cereal crops using regression analyses, usually based on single-point disease assessments made during anthesis or grain-filling. Different amounts of take-all were achieved by different methods of applying inoculum artificially (to wheat only) or by using different cropping sequences (in wheat, triticale or barley) or sowing dates (wheat only) in crops with natural inoculum. Regressions of yield or thousand-grain weight on take-all intensity during grain filling were similar to those on accumulated disease (area under the disease progress curve) when these were compared in one of the wheat experiments. Regressions of yield on take-all intensity were more often significant in wheat than in the less susceptible crops, triticale and barley, even when a wide range of disease intensities was present in the latter crops. The regressions usually had most significance when there were plots in the severe disease category. Thousand-grain weight and hectolitre weight usually responded similarly to total grain yield. Decreased yield was often accompanied by a significant increase in the percentage of small grains. When severe take-all was present in wheat, regressions showed that nitrogen uptake was usually impaired. This was sometimes accompanied, however, by increased percentage nitrogen in the grain as a consequence of smaller grain size with decreased endosperm. Significant effects of take-all, both positive and negative, on Hagberg falling number in wheat sometimes occurred. Significant regressions of yield on take-all assessed earlier than usual, ie during booting rather than grain-filling in wheat and triticale and during anthesis/grain-filling rather than ripening in barley, had steeper slopes. This is consistent with observations that severe disease that develops early can be particularly damaging, whilst the crops, especially barley, can later express tolerance by producing additional, healthy roots. The regression parameters, including maximum potential yield (y-axis intercept) and the extrapolated maximum yield loss, also varied according to the different growing conditions, including experimental treatments and other husbandry operations. These differences must be considered when assessing the economic potential of a control measure such as fungicidal seed treatment. (C) 2003 Society of Chemical Industry.

KeywordsAgronomy; Entomology
Year of Publication2003
JournalPest Management Science
Journal citation59 (2), pp. 215-224
Digital Object Identifier (DOI)
PubMed ID12587875
Open accessPublished as non-open access
FunderDepartment of Environment, Food and Rural Affairs
Funder project or code423
Interactions between cropping systems and soil-borne cereal pathogens
Output statusPublished
Publication dates
Online07 Jan 2003
Publication process dates
Accepted17 Jun 2002
Copyright licensePublisher copyright

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