Computational fluid dynamics-based decision-support tool for early warning against pests and diseases in greenhouse crops
The greenhouse can be considered as one of the most robust existing crop production systems, though epidemic pests and diseases still have severe impacts on production losses. To limit these losses while producing crops free of chemical residues, we are witnessing the implementation of a smart greenhouse concept, based on innovative tactics and strategies for crop protection. Such strategies include modeling tools, particularly computational fluid dynamics (CFD) modeling, to obtain real-time risk analysis and anticipate pest and disease infestations. CFD modeling has been used to simulate accurately the spatial distribution of climatic fields in cultivated greenhouses. More particularly, mapping of the distributed climate prevailing at leaf level in the ecological niche sheltering the pests was customized to consider also the risk of pest occurrences depending on local ambient climatic conditions. Based on their climatic preferences, risk classes for each pest were defined, encapsulated in user-defined functions (UDF) that considered the temperature and humidity fields within the crop leaf boundary layer. This UDF was dynamically linked with the CFD solver to obtain the risk of pest and disease occurrence depending on the climate parameters inside the greenhouse. Finally, the mapping of risks associated with each pest allows the anticipation of their dynamics under cropping conditions, which gives enough time for growers to deploy defense strategies before contamination. This study contributes to the development of plant protection and pest management strategies to achieve sustainable agriculture, reducing the number of pesticide applications.
Fatnassi, H., Boulard, T., Suay, R., Paris, B. and Poncet, C. (2018). Computational fluid dynamics-based decision-support tool for early warning against pests and diseases in greenhouse crops. Acta Hortic. 1227, 85-92
smart greenhouse, model, DST, plant protection