Evaluation of biocidal activity of four Lamiaceae leaves on the black bean aphid Aphis fabae Scopoli, 1763 (Homoptera: Aphididae)

The objective of our work was the valorisation four aromatic plants growing spontaneously in Kabylia (Algeria) by evaluation their insecticidal activity against black bean aphid Aphis fabae Scopoli, 1763. These are oregano, thyme, rosemary and lavender. were subjected to a phytochemical analysis determine secondary metabolites composition. results obtained showed that extracts toxic A. can significantly reduce its populations. LD50s 7.76 %; 8.91 9.72 % 12.88 recorded for rosemary, thyme lavender respectively. In addition, screening shows presence flavonoids, tannins, saponins polyphenols. polyphenols extraction indicates oregano extract is richest with polyphenol content 218.73 (± 0.22) µg GAE ml-1. This substance has significant biocidal power.