Cycle de séminaires scientifiques :
Agroécologie - Intensification écologique des systèmes de culture

Montpellier, Agropolis International

Allies in the trees

Intervenant(s):J.-F. Vayssières & al - Cirad, UR HORTSYS

Date : 2016-09-06

Allies in the trees In Africa, fruit trees form an important but unfortunately neglected component of people’s lives.

Séminaire agroécologie Montpellier du 06.09.2016 : Allies in trees / Jean-François Vayssières , Cirad, UR HORTSYS publié par Agropolis International sur la chaîne Agroécologie Montpellier.

Mango is a staple crop and a fundamental source of nutrition for rural populations living in West Africa with more than 70% of the mango crop depreciated by pests. The conservation biological control has great promise as a component of low cost sustainable pest management for smallholders.

Societies of weaver ants (Oecophylla spp.) are arboreal ants, territorially-dominant and their populations build large nests in trees. Societies of Oecophylla longinoda are very populous and have polydomus colonies. They require thick vegetation, especially perennial species, usually with an interconnected canopy to provide nesting sites and foraging areas. Several papers reporting work conducted has highlighted how O. longinoda could provide a way of reducing the massive losses to mangoes caused by fruit fly (Diptera Tephritidae) and improve fruit quality. We also recorded same positive results on citrus trees towards fruit flies and cashew trees towards sucking bugs (Hemiptera Alydidae, Coreidae, Miridae).

Generalist predators such as the weaver ant, O. longinoda (Latreille), play an important role as predators in sub-Saharan African orchards and by extension also in forest and savanna ecosystems. Several other examples can support this assertion through different countries as Benin, Ghana, Senegal and Tanzania. The next step will be to help all Africa’s farmers in appreciating this beneficial ant and training them in managing ant colonies. Protection of tropical forests and savannas is ecologically and environmentally crucial and also essential for the protection of O.longinoda and so,African farmers.

Questions à Jean-François Vayssières, Cirad, UR HORTSYS - Séminaire agroécologie Montpellier, 06.09.16 publié par Agropolis International sur la chaîne Agroécologie Montpellier.


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Les questions à J.-F. Vayssières & al - Cirad, UR HORTSYS


Au travers de séminaires/débats, des unités de recherche en agronomie de Montpellier (Cirad, Inra, Ird et Montpellier SupAgro) vous proposent, en partenariat avec Agropolis International, une animation collective transversale mensuelle autour de l'intensification écologique des systèmes de culture.


Mise à jour le 24/11/16


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