The influence of foliar diseases, and their control by fungicides, on the protein concentration in wheat grain: a review

Experiments investigating effects of foliar disease control on wheat grain protein concentration (GPC) are reviewed. Fungicidal control of rusts (Puccinia spp.) and powdery mildew (Erysiphe graminis) increased or had no significant effect on GPC in almost all cases, whilst control of the Septoria sp...

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Veröffentlicht in:The Journal of agricultural science 2002-06, Vol.138 (4), p.349-366
Hauptverfasser: DIMMOCK, J. P. R. E., GOODING, M. J.
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GOODING, M. J.
description Experiments investigating effects of foliar disease control on wheat grain protein concentration (GPC) are reviewed. Fungicidal control of rusts (Puccinia spp.) and powdery mildew (Erysiphe graminis) increased or had no significant effect on GPC in almost all cases, whilst control of the Septoria spp. often resulted in reduced GPC, but with exceptions. Reasons for these differences are discussed with reference to host pathogen interactions. Irrespective of infection strategy (biotrophic or necrotrophic), controlling severe infection increased nitrogen yield and the proportion of above-ground crop nitrogen that was partitioned to the grain. Similar effects are recorded for above-ground biomass and dry matter harvest index. The relationships between fungicide effects on green flag leaf area duration (GFLAD) and GPC were examined and shown to be unaffected by mode of action of the fungicide. Interactions between fungicide use and cultivar, nitrogen and growing season are related to the amount and type of pathogen present, and environment. An economic analysis demonstrated that fungicide effects on GPC should not affect the choice of fungicide or application programme, but that applications of foliar urea at the start of grain filling can deliver a cost-effective method of eliminating GPC reductions that may occasionally result from fungicide use.
doi_str_mv 10.1017/S0021859602002058
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Agric. Sci</addtitle><description>Experiments investigating effects of foliar disease control on wheat grain protein concentration (GPC) are reviewed. Fungicidal control of rusts (Puccinia spp.) and powdery mildew (Erysiphe graminis) increased or had no significant effect on GPC in almost all cases, whilst control of the Septoria spp. often resulted in reduced GPC, but with exceptions. Reasons for these differences are discussed with reference to host pathogen interactions. Irrespective of infection strategy (biotrophic or necrotrophic), controlling severe infection increased nitrogen yield and the proportion of above-ground crop nitrogen that was partitioned to the grain. Similar effects are recorded for above-ground biomass and dry matter harvest index. The relationships between fungicide effects on green flag leaf area duration (GFLAD) and GPC were examined and shown to be unaffected by mode of action of the fungicide. 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source Cambridge Journals
subjects Agricultural production
Agriculture
Agrochemicals products
Airborne microorganisms
Biological and medical sciences
Bread
Cereal and baking product industries
Cereals
CROPS AND SOILS
Cultivars
Disease control
Dry matter
Economic analysis
Feeds
Food industries
Fundamental and applied biological sciences. Psychology
Fungicides
Grain
Growing season
Infections
Mode of action
Nitrogen
Other agrochemicals used in plant protection (herbicides, fungicides, etc.)
Pathogens
Pesticides
Phytopathology. Animal pests. Plant and forest protection
Pollution effects and side effects of agrochemicals on crop plants and forest trees. Other anthropogenic factors
Pollution effects. Side effects of agrochemicals
Proteins
Urea
Wheat
title The influence of foliar diseases, and their control by fungicides, on the protein concentration in wheat grain: a review
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