Efficacy of two biopesticides in the management of the Mango Stone Weevil (Coleoptera: Curculionidae), a major pest of Mangoes in Côte d'Ivoire

In Côte d’Ivoire, mango is the third most exported fruit to Europe. However, mango production faces threats from certain insect pests such as fruit flies and, more recently, the mango stone weevil, which causes up to 90% loss of marketable fruits for export in infested countries. The objective of this study was to evaluate the effectiveness of biopesticides in controlling the mango stone weevil. The experimental design used was a Fisher block, with 3 treatments and 3 replications. The products tested (Neem oil; Limocide 60EC), as well as the reference product (Sauveur), were applied at three different concentrations on 100 adult weevils each. This study was conducted at the laboratory of the CNRA Lataha Research Station (Korhogo, Côte d’Ivoire). The results showed that Limocide 60 EC, applied at concentrations of 4,18.10⁻³ g/ml and 3,39.10⁻³ g/ml, caused mortality rates above 50% in adult weevils within 24 hours, similar to the reference product Sauveur, for which all tested concentrations were effective. These results highlight the potential of biopesticides for the control of mango stone weevils. Further field tests are recommended before their widespread use.