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POMICS: A Simulation Disease Model for Timing Fungicide Applications in Management of Powdery Mildew of Cucurbits

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Sapak, Z., Salam, M. U., Minchinton, E. J., MacManus, G. P. V., Joyce, D. C. and Galea, V. J. (2017) POMICS: A Simulation Disease Model for Timing Fungicide Applications in Management of Powdery Mildew of Cucurbits. Phytopathology, 107 (9). pp. 1022-1031. ISSN 0031-949X


Article Link: http://dx.doi.org/10.1094/PHYTO-11-16-0413-R


A weather-based simulation model, called Powdery Mildew of Cucurbits Simulation (POMICS), was constructed to predict fungicide application scheduling to manage powdery mildew of cucurbits. The model was developed on the principle that conditions favorable for Podosphaera xanthii, a causal pathogen of this crop disease, generate a number of infection cycles in a single growing season. The model consists of two components that (i) simulate the disease progression of P. xanthii in secondary infection cycles under natural conditions and (ii) predict the disease severity with application of fungicides at any recurrent disease cycles. The underlying environmental factors associated with P. xanthii infection were quantified from laboratory and field studies, and also gathered from literature. The performance of the POMICS model when validated with two datasets of uncontrolled natural infection was good (the mean difference between simulated and observed disease severity on a scale of 0 to 5 was 0.02 and 0.05). In simulations, POMICS was able to predict high- and low-risk disease alerts. Furthermore, the predicted disease severity was responsive to the number of fungicide applications. Such responsiveness indicates that the model has the potential to be used as a tool to guide the scheduling of judicious fungicide applications.

Item Type:Article
Business groups:Horticulture and Forestry Science
Keywords:temperature, vapor pressure deficit
Subjects:Science > Statistics > Simulation modelling
Plant pests and diseases > Plant pathology
Plant pests and diseases > Pest control and treatment of diseases. Plant protection
Live Archive:10 Jan 2018 05:13
Last Modified:03 Sep 2021 16:44

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