Modeling Cold Curing of Pierce's Disease in Vitis vinifera ‘Pinot Noir’ and ‘Cabernet Sauvignon’ Grapevines in California
| Autor: | B. C. Kirkpatrick, J.H. Lieth, M. M. Meyer, K.-H. Yeo |
|---|---|
| Rok vydání: | 2011 |
| Předmět: |
Microbial Viability
Time Factors Curing (food preservation) Inoculation Plant Science Biology Xylella biology.organism_classification Models Biological Plant tissue Vineyard California Plant disease Cold Temperature Horticulture Botany Vitis Seasons Cultivar Xylella fastidiosa Vitis vinifera Agronomy and Crop Science Plant Diseases |
| Zdroj: | Phytopathology®. 101:1492-1500 |
| ISSN: | 1943-7684 0031-949X |
| DOI: | 10.1094/phyto-08-10-0207 |
| Popis: | Pierce's disease (PD) of Vitis vinifera grapevines is caused by the bacterium Xylella fastidiosa, a pathogen with a wide plant host range. Exposure of X. fastidiosa-infected plant tissue to cold temperatures has been shown to be effective at eliminating the pathogen from some plant hosts such as grapevines. This “cold curing” phenomenon suggests itself as a potential method for disease management and perhaps control. We investigated cold therapy of PD-affected ‘Pinot Noir’ and ‘Cabernet Sauvignon’ grapevine. In the fall, inoculated plants and controls of each cultivar were transported to each of four field sites in California (Foresthill, McLaughlin, Hopland, and Davis) that differed in the magnitude of cold winter temperatures. A model for progression of the elimination of plant disease in relation to temperature was conceptualized to be a temperature-duration effect, where temperatures below a particular threshold kill X. fastidiosa with increasing efficacy as the temperature decreases to some value 0) = 6°C, number of hours to achieve 100% cure (N100) = 195 h, number of hours to achieve 10% cure (N10) = 20 h, and killing index (Kx) = 0.45 for Pinot Noir and T0 = 6°C, N100 = 302 h, N10 = 170 h, and Kx = 0.41 for Cabernet Sauvignon. With the parameter estimates optimized by model calibration, the simulation model was effective at predicting cold curing in four locations during the experiment, although there were some differences between Hopland for Pinot Noir and Davis for Cabernet Sauvignon. Using historical temperature data, the model accurately predicted the known severity of PD in other grape-growing regions of California, suggesting that it may have utility in assessing the relative risk of developing PD in proposed new vineyard sites. |
| Databáze: | OpenAIRE |
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