Stop me if you can: Quantification of the effect of interfaces between plots on the dispersal of Cosmopolites sordidus

Delaplace Alexis, Coulis Mathieu, Chapillon Laure, Cottin Gwenaëlle, Tixier Philippe. 2023. Stop me if you can: Quantification of the effect of interfaces between plots on the dispersal of Cosmopolites sordidus. Pest Management Science, 79 (12) : 5106-5115.

Résumé : BACKGROUND: Cosmopolites sordidus is one of the most damaging pests of banana worldwide. To date, most studies have addressed the control of this pest at the plot level, without considering the landscape scale, whereas between plots dispersion could be important. The aim of this study was to investigate the ability of C. sordidus to cross contrasted field interfaces. The 10 following interfaces were investigated: forests, hedgerows, field tracks, grassy areas, finely and coarsely tilled soil zones, ditches with and without water, vegetable gardening zones, and pheromone trap lines. Individually marked weevils were released on one side of the interface and recovered daily on the other side, allowing the estimation of the velocity and the crossing success of C. sordidus for each interface. RESULTS: Highest permeabilities (with a crossing success above 70%) were obtained for vegetable gardening zones, finely tilled soil zones, forests, and coarsely tilled soil zones. Intermediate permeabilities were measured for hedgerows, field tracks, grassy areas, and ditches without water. Only the line of pheromone traps and submerged ditches had a strong barrier effect on C. sordidus, with a crossing success below 12%. Wind strength, percentage of sky, and vegetation height were negatively correlated to the C. sordidus crossing success. CONCLUSION: Overall, our results showed that only ditches with water and lines of pheromone traps were efficient in stopping the dispersal of C. sordidus. The next step will be to conduct research to incorporate the use of these two interfaces at farm and landscape scale into integrated pest management strategies.

Mots-clés Agrovoc : Cosmopolites sordidus, phéromone, piège à base de phéromones, gestion intégrée des ravageurs, lutte antiravageur

Mots-clés libres : Banana weevil, Landscape ecology, Hedgerows, Insect movement, Pheromone traps

Classification Agris : H10 - Ravageurs des plantes

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

Agences de financement hors UE : Association Nationale de la Recherche et de la Technologie

Auteurs et affiliations

• Delaplace Alexis, CIRAD-PERSYST-UPR GECO (MTQ)
• Coulis Mathieu, CIRAD-PERSYST-UPR GECO (MTQ) ORCID: 0000-0001-5895-8519
• Chapillon Laure, Université de Montpellier (FRA)
• Cottin Gwenaëlle, Presta'SCIC (FRA)
• Tixier Philippe, CIRAD-PERSYST-UPR GECO (FRA) ORCID: 0000-0001-5147-9777 - auteur correspondant

Source : Cirad-Agritrop (https://agritrop.cirad.fr/606226/)

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