Inventaire des insectes nuisibles aux fruits des variétés indiennes deZiziphus mauritianaLam. (Rhamnaceae) au Burkina Faso uri icon

abstract

  • Introduction. Our study related to the identification of the pests of the fruits of Indian jujube trees introduced into Burkina Faso. Our objective was to make an inventory of these devastating pests dependent on these new cultivars of jujube trees and to test various techniques for their trapping. After identification of the insects whose host plant is the jujube tree, we determined those which complete their reproductive cycle on the jujubes. Materials and methods. We used food baits with industrial manufacturing traps containing torula and terpinyl acetate and tested the effectiveness of complex (artisanal traps / natural attractants) compared with torula traps. We then incubated attacked fruits in order to identify the insects which would emerge. Fluctuating populations of Tephritidae were followed from weekly surveys in the torula traps. Simultaneously, the evolution of fruit production was studied. Results. The inventory carried out in an Indian jujube orchard revealed the presence of several families belonging to the Diptera order, which include ten species of fruit flies in four genera (Bactrocera, Dacus, Ceratitis and Carpomya); a noctuidae of the lepidoptera (genus Agrotis) was also identified. The species most represented in collections by traps were Carpomya incompleta (44.86%), Bactrocera invadens (21.58%) and Bactrocera cucurbitae (18.49%). The rate of emergence after incubation of attacked jujubes was 50%. Only two species emerged from these fruits: C. incompleta (84%) and Agrostis sp. (16%). Among the natural food baits tested, only the mixture (local beer + banana) allowed us to trap Tephritidae (Bactrocera invadens) and the lepitoptera Agrotis sp. However, two other natural baits (rotting fruit and condensed milk) led to the capture of Agrotis sp. Discussion and conclusion. Our results highlighted the two potential pests of Indian jujube in Burkina Faso. Further studies on the identification of the species of Agrotis, and on the biology, ecology and behavior of the offending pests will be needed for the definition of control methods in jujube plantations in Burkina

publication date

  • 2012