Assessment of the physiological effects of pathogenic infection of grapevine leaves and berries
Hunter, J J
Pathogenic infection of grapevine leaves and bunches by powdery mildew, downy mildew and grey mould causes premature decline in leaf function and abscission. As a result, physiological stress and changes in source:sink ratios are inevitable. Sustained productivity of the grapevine may be seriously affected as a result of e.g. restricted reserve accumulation. The aim of this investigation is to determine the metabolic effects of pathogenic infection and to facilitate early detection of pathogenic infection of grapevine leaves and berries by using fungal marker compounds. Based on this, pathogenic infection may be correlated with leaf function and/or changes in source:sink relationships and output. Recommendations to minimise curative measures and/or methods for prevention/restriction of pathogenic infection or transition of the leaves/berries to the necrotrophic phase, may be proposed. In this respect, the project will contribute to the environment-friendly cultivation of grapevines.