Modélisation du cycle de l'oïdium de la vigne dans un outil d'aide à la décision : intégration de nouveaux formalismes

Abstract : In a period of changes in the agricultural world towards more environmentally friendly practices, the company ITK is developing a decision support tool to optimize the protection of the vineyards against grape downy and powdery mildews. This expert system is built on several agronomical models. It computes a disease risk index based on environmental conditions. Then, it issues treatment recommendations to growers tailored to their objectives, practices and to the legislation. The software relevance is closely dependent on the accuracy of the scientific models on which it relies. Therefore it has to evolve with new research findings and technological progress that improves field data collection. The aim of this work placement was to update the powdery mildew model by simulating the whole life cycle of the fungus, and by identifying, in the literature, the influence of several environmental variables. A prototype was designed within the specific constraints of building a decision support tool. It computes each development stage of the fungus on a mechanistic basis. Although it could not be confronted to field data for its calibration and validation, a qualitative analysis has shown that each of its modules behaves as expected. Emphasis was placed on the model flexibility, and therefore on its ability to readily undergo changes if new knowledge concerning the pathogen would appear.
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Master thesis
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http://docnum.univ-lorraine.fr/public/SCDSCI_M_2011_GARIN_GUILLAUME.pdf
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Guillaume Garin. Modélisation du cycle de l'oïdium de la vigne dans un outil d'aide à la décision : intégration de nouveaux formalismes. Sciences de l'environnement. 2011. ⟨hal-01877240⟩

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