Modeling quality losses caused by pests on temperate and tropical perennial fruit crops: a generic framework for theoretical and applied issues
Projet finance par le métaprogramme SMACH (2013-2015). Coordination Michel Génard & Daniele Bevacqua INRA, UR PSH et Isabelle Grechi CIRAD, UR HortSys
Autres partenaires du projet
INRA, UR1052 GAFL (Genetic Improvement of Fruits & Vegetables), Avignon; Polytechnic of Milan, DEI (Department of Electronics and Information)
In Northern and Southern countries, fruit crops are facing great pest pressures that can result in fruit production losses. These losses, resulting from direct or indirect fruit damage - pests can indeed directly attack the fruits (organs 'sinks') or attack the vegetative parts of the tree (organs 'sources') - are both quantitative and qualitative. We propose a generic process-based modeling framework to analyze and quantify losses in fruit quality induced by pests, considering a multi-criteria quality. We will also consider the consequences on fruit quality of management practices and crop genotypes usually adopted to cope with yield losses. This framework will allow (i) comparing the losses according to the type of pest impact (on 'sources' vs. 'sinks'), (ii) studying losses at different time scales (from the single year to the orchard life), and (iii) considering the trade-off between yield and quality losses in the context of biotic stress. We aim to develop a theoretical modeling framework of general value, and then apply it to three model pathosystems: mango-fruit fly (Bactrocera and/or Ceratitis spp.) in tropical environment, peach-brown rot (Monilinia spp.) and peach-aphid (Myzus persicae) in temperate environment.