Plant richness enhances banana weevil regulation in a tropical agroecosystem by affecting a multitrophic food web

Poeydebat Charlotte, Tixier Philippe, De Lapeyre de Bellaire Luc, Carval Dominique. 2017. Plant richness enhances banana weevil regulation in a tropical agroecosystem by affecting a multitrophic food web. Biological Control, 114 : 125-132.

Quartile : Q1, Sujet : ENTOMOLOGY / Quartile : Q3, Sujet : BIOTECHNOLOGY & APPLIED MICROBIOLOGY

Liste HCERES des revues (en SHS) : oui

Thème(s) HCERES des revues (en SHS) : Psychologie-éthologie-ergonomie

Résumé : Field-scale plant diversification of agroecosystems is a promising way to enhance ecological pest regulation. Existing studies, however, have provided inconsistent results and have generally focused on only a few trophic groups or a few levels of plant diversification. Using field data from banana agroecosystems and structural equation modelling, we assessed (i) the effects of plant species richness (two height strata) and soil cover (% of living plant cover and% of litter cover) on a multitrophic arthropod food web, (ii) the links among five trophic groups of arthropods (detritivores, herbivores, non-ant omnivores, omnivorous ants, and predators) and (iii) the effect of natural enemies on the abundance and the damage of the banana weevil, Cosmopolites sordidus. Plant species richness of low strata (<1.5 m high) had a positive bottom-up effect on herbivore prey abundance, which in turn enhanced the abundance of non-ant omnivores and of predators. Litter cover promoted the abundance of detritivore prey, which in turn enhanced predators and omnivorous ants. The latter two trophic groups were negatively related to weevil damage and probably reduced damage by consuming weevil eggs and larvae. Finally, on the basis of our results, we suggest how the plant community and soil cover within the field could be managed to enhance ecological regulation of the banana weevil.

Mots-clés Agrovoc : Musa, Cosmopolites sordidus, agroécosystème, lutte intégrée, biodiversité, gestion intégrée des ravageurs, dynamique des populations, couverture végétale, Arthropoda, régime alimentaire, modèle de simulation, modèle mathématique, écologie, écologie animale

Mots-clés géographiques Agrovoc : Costa Rica

Classification Agris : H10 - Ravageurs des plantes
F08 - Systèmes et modes de culture

Champ stratégique Cirad : Axe 4 (2014-2018) - Santé des animaux et des plantes

Agences de financement européennes : European Regional Development Fund

Projets sur financement : (EU) Use of the biodiversity of Martinique to improve the functioning of agro ecosystems

Auteurs et affiliations

• Poeydebat Charlotte, CIRAD-PERSYST-UPR GECO (FRA)
• Tixier Philippe, CIRAD-PERSYST-UPR GECO (FRA) ORCID: 0000-0001-5147-9777
• De Lapeyre de Bellaire Luc, CIRAD-PERSYST-UPR Systèmes bananes et ananas (FRA) ORCID: 0000-0003-1243-0887
• Carval Dominique, CIRAD-PERSYST-UPR GECO (FRA)

Source : Cirad-Agritrop (https://agritrop.cirad.fr/585508/)

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