Modeling for agroecological protection of rice. A review
Résumé
Context: Intensive use of pesticides in rice paddies is harmful to both human health and biodiversity. As ricefarmers tend to overuse pesticides, especially in the tropics, the use of decision support tools is one way forpesticide reduction. Various models have been developed to simulate the development of rice pests, or the impactof pests on the rice crop.Objective or research question: The objective of the review is to identify modeling approaches that may be usefulfor agroecological protection of rice crops against a wide range of pests, but not to provide an exhaustive reviewof models. We analyzed the scientific literature on rice pest, crop models integrating pest levels, and rice croppestmodels according to the number and type of pests simulated, the structure of the model, whether croppingpractices are included in the simulation, the consideration of pest damages and yield losses, and hence the actualuse of these models to improve crop protection strategy.Methods: We analyzed a total of 78 articles and 56 original models based on their structure, inclusion of pests,and cropping practices.Results: We identified 35 articles using pest models to simulate pest injuries; 34 articles using crop models tosimulate the pest damages on yield losses; and 9 articles using crop-pest models to simulate the interactionsbetween pest dynamics and crop growth.Conclusions: Different types of models offer different uses for ACP strategies. An innovative conceptual model foragroecological rice protection is proposed.Implications or significance: The presented review is a springboard to future modeling developments useful foragroecological rice protection. Combined with other approaches, such as field experiments and demonstrations,farmer workshops, teaching and training, specific advices to farmers, modeling approaches can help design moresustainable rice-based cropping systems.
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