Efficacy of aqueous extracts of neem (Azadirachta indica) leaves in the control of date palm Boufaroua (Oligonychus afrasiaticus) in Algeria

In Algeria, the neem plant Azadirachta indica (Magnoliopsida: Sapindales: Meliaceae) has insecticidal and miticidal properties. The use of such a natural biopesticide, preserving the environment and human health, is necessary. We conducted this study to evaluate the efficacy of aqueous extracts of A. indica leaves in the control of Oligonychus afrasiaticus (Arachnida: Trombidiformes: Tetranychidae) (Boufaroua), one of the main pests of the date palm. The results obtained showed a highly significant effect (P<0.001) in the control of this pest for the two doses applied (D1: 100% stock solution of aqueous extracts of neem leaves, D2: 25% dilution of the stock solution). The mortality rate against Boufaroua was 97.61% and 96.36%, respectively, for the two doses used, with no significant difference between them. These highly effective and widely available extracts can be used to control pest populations of date palm such as O. afrasiaticus. The results obtained for this biochemical control method are technically effective and economically affordable, given the widespread availability of neem over a large part of southern Algeria. It would be worthwhile extending neem cultivation to all regions where Boufaroua is abundant. This practice would help to protect human health and the environment.