Solanum nigrum is a plant that has therapeutic properties of the Solanaceae family. It is used extensively in traditional medicine but also as a bio-insecticide to control insect pests. Some parts of this plant can be very toxic to livestock and humans. In the present study, the direct and delayed toxic effects of aqueous extracts of S. nigrum on the mortality and development of Drosophila melanogaster were investigated. For this study, an extraction method including decoction is adopted to extract the active principles from the leaves of S. nigrum. The treatment was carried out by ingestion on 2nd instar larvae (L2) and adults. The exposure to the aqueous extract shows that it has a good insecticidal activities, it acts on the larvae by inducing 96.25 % mortality rate at the end of treatment by 50g/l. The adults’ mortality increases with the lengthening of the exposure time as well as with the dose increase. The maximum mortality was recorded is between 97.50% and 100% in males and females. We also recorded a disturbance in the flies development, which took less time to reach the adult stage when they were treated, and this for the five concentrations. Malformations were recorded in the adult wings after treatment with the different concentrations of the toxic plant. In addition, some flies showed a significant increase in size compared to controls.

Article History

Received: July 10, 2021; Accepted: Sep 12, 2021; Published: Dec 31, 2021

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