Effect of neem derivatives (Azacdirachta indica) on the mango mealybug (Rastrococcus invadens) for biological control

Pest insects are a major constraint on fruit production in Senegal. In order to find an alternative to the chemical control of these pests, the insecticidal effect of neem derivatives (Azadirachta indica) formulated at different doses on the mango mealybug (Rastrococcus invadens) was studied. The powders obtained from the different parts of the neem were mixed with distilled water in different proportions, namely for 100ml 0g (control), 1g, 2g, 4g, 8g, 16g, 32g, 64g and 124g. The whole, consisting of water and powders of the different parts of neem, was homogenized. For each treatment, 5 repetitions were made over 5 days.

The results obtained show that neem significantly reduced the populations of mealybug on the mango tree. The results also showed that neem is a very effective insecticide against these pests. This effectiveness is all the more important with almond derivatives (100% mortality at a dose of 32g per 100ml) compared to other neem derivatives.