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Plateforme des connaissances sur l'agroécologie

Plant species diversity for sustainable management of crop pests and diseases in agroecosystems: a review

Farmers are facing serious plant protection issues and phytosanitary risks, in particular in the tropics. Such issues are food insecurity, lower income in traditional low-input agroecosystems, adverse effects of pesticide use on human health and on the environment in intensive systems and export restrictions due to strict regulations on quarantine pests and limits on pesticide residues. To provide more and better food to populations in both the southern and northern hemispheres in a sustainable manner, there is a need for a drastic reduction in pesticide use while keeping crop pest and disease damage under control. This can be achieved by breaking with industrial agriculture and using an agroecological approach, whose main pillar is the conservation or introduction of plant diversity in agroecosystems. Earlier literature suggest that increasing vegetation biodiversity in agroecosystems can reduce the impact of pests and diseases. Here we review reported examples on a broad range of pathogens and pests, e.g. insects, mites, myriapods, nematodes, parasitic weeds, fungi, bacteria and viruses across different cropping systems. Our review confirms that it is not necessarily true that vegetation diversification reduces the incidence of pests and diseases. Improving our understanding of the mechanisms involved should enable us to explain how, where and when exceptions to the above principle are likely to occur, with a view to developing sustainable agroecosystems based on enhanced ecological processes of pest and disease control by optimized vegetation diversification.

Title of publication: Agronomy for Sustainable Development
Volume: 32
Issue: 1
ISSN: 1773-0155
Nombre de pages: 273-303
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Année: 2011
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Texte intégral disponible à l'adresse: https://link.springer.com/article/10.1007%2Fs13593-011-0022-4
Langue: English
Author: Alain Ratnadass , Paula Fernandes, Jacques Avelino, Robert Habib
Type: Journal article
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