ACTUALISATION DE LA REPARTITION DE LA COCHENILLE FARINEUSE DU MANGUIER ET SES ENNEMIS NATURELS DANS LES REGIONS DU PORO ET TCHOLOGO (NORD, COTE DIVOIRE)

Rastrococcusinvadens, commonly known as the mango mealybug, is a sap-sucking, biting insect. The unexpected introduction of this pest has prompted extensive research in several countries to find control solutions. The aim of this study was to identify areas of infestation by mango mealybugs and draw up a distribution map of the different species identified. A survey was carried out in the study areas, to observe the presence or absence of mealybugs. Sixty (60) orchards were visited in the Poro and Tchologo regions. Ten (10) mango trees per orchard were randomly selected and twenty (20) infested leaves were collected per tree to identify the different species present. Mango leaves containing mealybug mummies were incubated to identify emerging parasitoids. The results showed that the prevalence of infested orchards varied from 50 to 100% in all localities. 08.01% of the orchards visited had a high attack rate, as did the infestation level of the mango trees sampled. Three species of scale insect were encountered: Rastrococcusinvadens, Iceryaaegyptiaca and Pseudococcusvibuni. These species were found at all study sites. R. invadens, I. aegyptiaca and P. viburni had a relative abundance of 100% in Diawala, Kombolokoura and Koumbala respectively. In both study areas, the parasitoids Gyranusoideatebygi Noyes and Anagyrusmangicola were observed in the localities surveyed.