A threshold-based weather model for predicting stripe rust infection in winter wheat
Article
Article Title | A threshold-based weather model for predicting stripe rust infection in winter wheat |
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ERA Journal ID | 2647 |
Article Category | Article |
Authors | El Jarroudi, Moussa (Author), Kouadio, Louis (Author), Bock, Clive H. (Author), El Jarroudi, Mustapha (Author), Junk, Jürgen (Author), Pasquali, Matias (Author), Maraite, Henri (Author) and Delfosse, Philippe (Author) |
Journal Title | Plant Disease: an international journal of applied plant pathology |
Journal Citation | 101 (5), pp. 693-703 |
Number of Pages | 11 |
Year | 2017 |
Publisher | American Phytopathological Society |
Place of Publication | United States |
ISSN | 0191-2917 |
1943-7692 | |
Digital Object Identifier (DOI) | https://doi.org/10.1094/PDIS-12-16-1766-RE |
Abstract | Wheat stripe rust (caused by Puccinia striiformis f. sp. tritici) is a major threat in most wheat growing regions worldwide, which potentially causes substantial yield losses when environmental conditions are favorable. Data from 1999-2015 for three representative wheat-growing sites in Luxembourg were used to develop a threshold-based weather model for predicting wheat stripe rust. First, the range of favorable weather conditions using a Monte Carlo simulation method based on the Dennis model were characterized. Then, the optimum combined favorable weather variables (air temperature, relative humidity, and rainfall) during the most critical infection period (May-June) was identified and was used to develop the model. Uninterrupted hours with such favorable weather conditions over each dekad (i.e., 10-day period) during May-June were also considered when building the model. Results showed that a combination of relative humidity > 92% and 4°C < temperature < 16°C for a minimum of 4 continuous hours, associated with rainfall ≤ 0.1 mm (with the dekad having these conditions for 5-20% of the time), were optimum to the development of a wheat stripe rust epidemic. The model accurately predicted infection events: probabilities of detection were ≥ 0.90 and false alarm ratios were ≤ 0.38 on average, and critical success indexes ranged from 0.63 to 1. The method is potentially applicable to studies of other economically important fungal diseases of other crops or in different geographical locations. If weather forecasts are available, the threshold-based weather model can be integrated into an operational warning system to guide fungicide applications. |
Keywords | Yellow rust, disease model, Monte Carlo method, Puccinia striiformis |
ANZSRC Field of Research 2020 | 300409. Crop and pasture protection (incl. pests, diseases and weeds) |
Public Notes | Files associated with this item cannot be displayed due to copyright restrictions. |
Byline Affiliations | University of Liege, Belgium |
International Centre for Applied Climate Science | |
Department of Agriculture, United States | |
Abdelmalek Essaâdi University, Morocco | |
Luxembourg Institute of Science and Technology, Luxembourg | |
University of Milan, Italy | |
Catholic University of Leuven, Belgium | |
Institution of Origin | University of Southern Queensland |
https://research.usq.edu.au/item/q3x87/a-threshold-based-weather-model-for-predicting-stripe-rust-infection-in-winter-wheat
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