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Nathalie Villeméjeanne
Tel. : +33 (0)4 67 04 75 68


Agenda - Past events

Take a glance at the events organised by Agropolis International Association and its members and also events of interest for the general public.

  • Past events


A monthly rendez vous 'Scientific animation on Agroecology - Ecological intensification of cropping systems' :J.-F. Vayssières & al - Cirad, UR HORTSYS :Seminar 'Allies in the trees'

Date : September 06, 2016
Location : Agropolis International, Montpellier, France

In Africa, fruit trees form an important but unfortunately neglected component of people’s lives. 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. Several joint agricultural research units in Montpellier from CIRAD, INRA, IRD and SupAgro have initiated a monthy cycle of seminars and debates, in partnership with Agropolis International, around ecological intensification of cropping systems.


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Update on 8/06/15

Nathalie Villeméjeanne
Tel. : +33 (0)4 67 04 75 68

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