Larvicidal effect of Ruta graveolens L. plant extract against Myzus persicae (Sulzer) (Homoptera: Aphididae) in Capsicum annum

Capsicum annum, one of the most important subsistence greenhouse vegetable crops in the Biskra region, has been destroyed by the more damaging pest M. persicae. Biological control using aqueous extracts of medicinal plants could be a viable alternative for decreasing the use of chemical products. The current study aims to assess the larvicidal activity of the aerial component of Ruta graveolens L. on green peach aphid larvae M. persicae via contact. Three concentrations with four replications were applied to M. persicae larvae, and corrected mortality was measured after 24 hours, 48 hours, and 72 hours. The results showed that an aqueous extract of R. graveolens was effective on M. persicae sulzer at 5, 10 and 20% concentrations with a 97% mortality rate after 72 hours with the 20% dose. The value of the current work is that an aqueous extract of R. graveolens was poisonous to the green peach aphid; these findings can help to produce biopesticide.