Associated cultivated plants in tomato cropping systems structure arthropod communities and increase the Helicoverpa armigera regulation

Dassou Gbèblonoudo Anicet, Vodouhé Simplice Davo, Bokonon Ganta Aimé, Goergen Georg, Chailleux Anaïs, Dansi Alexandre, Carval Dominique, Tixier Philippe. 2019. Associated cultivated plants in tomato cropping systems structure arthropod communities and increase the Helicoverpa armigera regulation. Bulletin of Entomological Research, 109 (6) : 733-740.

Quartile : Q2, Sujet : ENTOMOLOGY

Liste HCERES des revues (en SHS) : oui

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

Résumé : Cultivating plant mixtures is expected to provide a higher productivity and a better control of pests and diseases. The structure of the arthropod community is a major driver of the magnitude of natural pest regulations. With the aim of optimizing pest management, a study was carried out to determine the effect of the cropping system type (tomato mono-cropping vs. mixed-cropping) on the diversity and abundance of arthropods from three trophic groups (herbivores, omnivores, predators) and the abundance of Helicoverpa armigera. Therefore, the diversity of cultivated plants and arthropod communities was assessed within tomato fields from 30 farmer's fields randomly selected in South of Benin. Results showed that the arthropod abundance was significantly higher in mixed-cropping systems compared with mono-cropping systems, although the crop type did not alter significantly the arthropod diversity, evenness, and richness. At the level of taxa, the abundances of generalist predators including ants (Pheidole spp., and Paltothyreus tarsatus) and spiders (Araneus spp. and Erigone sp.) were significantly higher in mixed fields than in mono-crop fields. Then, the abundances of omnivore-predator trophic groups have a negative significant effect on the H. armigera abundance. This study allowed better understanding of how plant diversity associated to tomato fields structures arthropod's food webs to finally enhance the ecological management of H. armigera.

Mots-clés Agrovoc : culture associée, résistance aux maladies, résistance aux organismes nuisibles

Mots-clés géographiques Agrovoc : Bénin

Mots-clés libres : Ecological management, Food web, Natural regulation, Helicoverpa armigera, Ants

Classification Agris : F08 - Systèmes et modes de culture
H20 - Maladies des plantes
H10 - Ravageurs des plantes

Champ stratégique Cirad : CTS 2 (2019-) - Transitions agroécologiques

Auteurs et affiliations

• Dassou Gbèblonoudo Anicet, UAC (BEN)
• Vodouhé Simplice Davo, UAC (BEN)
• Bokonon Ganta Aimé, UAC (BEN)
• Goergen Georg, IITA (BEN)
• Chailleux Anaïs, CIRAD-PERSYST-UPR HortSys (SEN)
• Dansi Alexandre, UAC (BEN)
• Carval Dominique, CIRAD-PERSYST-UPR GECO (FRA)
• Tixier Philippe, CIRAD-PERSYST-UPR GECO (FRA) ORCID: 0000-0001-5147-9777 - auteur correspondant

Source : Cirad-Agritrop (https://agritrop.cirad.fr/593246/)

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