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

Abstract : The use of decision support tools is growing, in a period of climate change and evolution in the agricultural world towards more environmentally friendly practices. The company ITK creates and develops this kind of tool to enable wine growers to optimize the protection of the vineyards. One of them allows to handle the pressure of the downy mildew, and is based on several agronomical models from the scientific research. It computes a disease risk index based on environmental conditions and issues treatment recommendations to wine growers tailored to their objectives, and to the actual legislation. Scientific knowledge constitutes the base of the model and allows to integrate the effect of the climatic parameters on the fungus development. However, gaps still exist in the description of several stages of the downy mildew biological cycle. Therefore, the model has to evolve with new research findings and technological progress improving climatic and epidemiological field data collection. The aim of this work placement was to built a new downy mildew model with a mechanistic approach, using the new scientific knowledge, and the effect of new climatic parameters on the whole fungus life cycle, whose data were not available for the previous model. Emphasis was placed on the model flexibility so that it can readily undergo changes if new knowledge concerning the pathogen would appear. In a context of poor field data base, predictions were confronted to field data to estimate the reliability of the predictions of contaminations and disease severity.
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Master thesis
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http://docnum.univ-lorraine.fr/public/BUS_M_2012_FRANCHE_JEAN-CHARLES.pdf
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Jean-Charles Franche. Modélisation du cycle du mildiou de la vigne dans un outil d'aide à la décision : intégration de nouveaux formalismes. Sciences de l'environnement. 2012. ⟨hal-01871194⟩

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