Infestation of mangoes in the area of Niayes: Kinetics of evolution of fruit flies and their associated parasitoids

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RajaaMiss Rajaa Awa LO
Title: Infestation of mangoes in the area of Niayes: Kinetics of evolution of fruit flies and their associated parasitoids
Summary
Many West African countries are confronted with the problematic of fruit flies including Bactrocera dorsalis. Since its introduction to Senegal in 2004, this invasive species has caused significant damage to Senegalese fruit production because of the outbreak peak of the pest populations that coincides with the ripening period of the mangoes. Biological control, through the use of parasitoids, could be an effective means of combating these pests with more environmentally friendly methods of control. The objective of this study is to identify the different species of fruit flies present in the Niayes area; To follow the variability of infestation according to the site of collection, the type of orchard and the variety of fruit; To follow the dynamics of the populations of the fruit flies throughout the study and finally to identify the different species of parasitoids of flies from the endogenous fruits to the area of the Niayes. Fruit collections were carried out in orchards in the Dakar and Thiès regions. At the end of the fruit collection, three main species of fruit flies have been identified, of which B. dorsalis is the majority species in front of the species Ceratitis Cosya and C. silvestrii. The rate of fly infestation is a function of the collection site, the type of orchard and the variety of the fruit. The Kent and Keitt varieties are the most attacked. The introduction of exotic parasitoids could strengthen the action of endogenous ones in the management of these pests.
Key words: Fruit flies, parasitoids, Niayes Zone, Senegal