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Automated analysis of aggregated datasets to identify climatic predictors of botrytis bunch rot in wine grapes


Hill, GN and Beresford, RM and Evans, K, Automated analysis of aggregated datasets to identify climatic predictors of botrytis bunch rot in wine grapes, Phytopathology, 109, (1) pp. 84-95. ISSN 0031-949X (2018) [Refereed Article]

Copyright Statement

Copyright 2018 APS

DOI: doi:10.1094/PHYTO-10-17-0357-R


Botrytis bunch rot (BBR), caused by Botrytis cinerea, results in serious losses to wine-grape production in some seasons during the pre-harvest period. In order to predict seasons that are at risk from BBR, datasets consisting of 25 disease, weather and vine phenology variables were aggregated from 101 SiteYears across seven regions and nine growing seasons. Automated analyses were used to compare a range of statistical methods for their ability to predict BBR epidemics, including the Kruskal-Wallis test, logistic regression, receiver operating characteristic (ROC) analysis, and skill-scores. Variables based on relative humidity (RH) and surface-wetness duration were significant and consistent predictors of BBR epidemics across the range of analyses applied. Variables integrating temperature and wetness duration, including the Bacchus and Broome models, also demonstrated high predictive ability; however, they did not outperform their constituent components in all analyses. Automation of data analyses was an effective way to compare a wide range of statistical methods and a large number of variables with minimal user input, following initial code development. Significant time was needed to check input data and software code, but a greater return on investment would occur should the analytical process be applied to new datasets, including those from other pathosystems.

Item Details

Item Type:Refereed Article
Keywords:disease control and pest management, ecology and epidemiology, techniques, bunch rot, botrytis, grape, wine
Research Division:Agricultural, Veterinary and Food Sciences
Research Group:Horticultural production
Research Field:Oenology and viticulture
Objective Division:Plant Production and Plant Primary Products
Objective Group:Industrial crops
Objective Field:Wine grapes
UTAS Author:Evans, K (Associate Professor Katherine Evans)
ID Code:129148
Year Published:2018
Web of Science® Times Cited:5
Deposited By:TIA - Research Institute
Deposited On:2018-11-12
Last Modified:2019-05-07

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