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ARS Home » Pacific West Area » Corvallis, Oregon » Horticultural Crops Research » Research » Publications at this Location » Publication #303605

Research Project: Exotic and Emerging Plant Diseases of Horticultural Crops

Location: Horticultural Crops Research

Title: Improving management of grape powdery mildew with new tools and knowledge

item Mahaffee, Walter - Walt
item SCHWEBS, SETH - Coastal Viticultural Consultants
item HAND, FRANCESCA - Ohio University
item GUBLER, DOUG - University Of California
item BAILY, BRIAN - University Of Utah
item STOLL, ROB - University Of Utah

Submitted to: Practical Winery and Vineyards
Publication Type: Review Article
Publication Acceptance Date: 4/1/2014
Publication Date: 5/1/2014
Citation: Mahaffee, W.F., Schwebs, S., Hand, F., Gubler, D., Baily, B., Stoll, R. 2014. Improving management of grape powdery mildew with new tools and knowledge. Practical Winery and Vineyards. April:59-67.

Interpretive Summary:

Technical Abstract: The assumption that inoculum of the grape powdery mildew pathogen is always available once conditions are suitable for inoculum release has been shown to be incorrect. Using various molecular techniques, we have shown that viticulturist can reduce their fungicide applications, on average, by 2.4 application per year in commercial vineyard trails by monitoring inoculum availability. We have joined with commercial companies to make these techniques available to viticulturists. Combining data with predictive modeling on pathogen dispersion, it will soon be possible to predict the spatial distribution of disease risk over time at the vine level.