Crucifer-legume cover crop mixtures for biocontrol: Toward a new multi-service paradigm

Couëdel Antoine, Kirkegaard John, Alletto Lionel, Justes Eric. 2019. Crucifer-legume cover crop mixtures for biocontrol: Toward a new multi-service paradigm. Advances in Agronomy, 157 : 55-139.

Quartile : Outlier, Sujet : AGRONOMY

Résumé : Multi-service cover crops grown during the fallow period between two main cash crops are a tool to support sustainable crop production. Crucifer-legume mixtures may provide improved multi-ecosystem services compared to sole cover crops, but trade-offs between the known crucifer biocontrol potential and N cycling benefits of legumes are uncertain. We review suppressive effects of crucifers as sole crops and in mixtures with legumes for a wide range of pathogenic and beneficial organisms to compare the services and potential disservices of the strategies. We conclude that biocontrol services of crucifer sole crops could be largely maintained in crucifer-legume mixtures while improving nutrient services, and reducing potential disservices. The lack of comprehensive multi-disciplinary field studies that investigate the multi-service paradigm limit our current understanding of the trade-offs between services, but reveal fruitful research opportunities. We emphasize the need to refocus cover crop biocontrol research from a largely “pesticide” paradigm targeting maximum production of bioactive compounds by sole crucifer cover crops, to a multi-service paradigm in which selected crucifer-legume mixtures may offer promise in the quest for the sustainable intensification of agriculture.

Mots-clés Agrovoc : jachère, services écosystémiques, lutte biologique contre les maladies, désherbage biologique, lutte culturelle contre les maladies, désherbage culturel, contrôle culturel des nuisibles, plante de couverture, légume, légumineuse, culture intercalaire, contrôle de maladies, culture de rapport, Brassicaceae

Mots-clés complémentaires : lutte anti-mauvaises herbes, crucifères

Mots-clés libres : Cover crops, Biocontrol

Classification Agris : H01 - Protection des végétaux - Considérations générales
F08 - Systèmes et modes de culture
H20 - Maladies des plantes
H60 - Mauvaises herbes et désherbage
H10 - Ravageurs des plantes

Champ stratégique Cirad : CTS 4 (2019-) - Santé des plantes, des animaux et des écosystèmes

Auteurs et affiliations

• Couëdel Antoine, Université de Toulouse (FRA)
• Kirkegaard John, CSIRO (AUS)
• Alletto Lionel, Université de Toulouse (FRA)
• Justes Eric, CIRAD-PERSYST-UMR SYSTEM (FRA) ORCID: 0000-0001-7390-7058 - auteur correspondant

Source : Cirad-Agritrop (https://agritrop.cirad.fr/592930/)

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