Ethanolic extract of catwort (Nepeta cateria L.) in the management of beans weevil (Callosobruchus maculatus) Fab. (Coleoptera: Bruchidae)

Abstract

Ethanolic extracts of Catwort (Nepeta cateria L.) leaves were screened for secondary metabolite constituents to test and investigate their insecticidal activity against cowpea weevil (Callosobruchus maculatus L.): (Fab) (Coleoptera: Bruchidea). Phytochemical analysis of the extracts revealed the presence of alkaloid, saponins, flavonoids, tannins, carbohydrates, Phlobo-tannins acids, steride, glycoside, and anthraquinone.  The Ethanolic leaves extract of Nepeta cateria L. was found to cause significant mortality on the target insect at different concentrations. The study found that the effect of the extracts was proportional to the treatment concentration, with higher concentrations having a stronger effect on insect activity. At different hours after treatment, the observed overall mean mortality increased with increasing time intervals after treatment with the bio-based plant mean extract mortality. The results showed that 2.5g of Ethanolic leaf extracts of Nepeta cateria L. showed the highest mortality against ovicidal and insecticidal control of C. maculatus at 1.0g, 1.5g, 2.0g, and 2.5g, respectively after treatment.