Etude de l’activité insecticide d’extrait hydroalcoolique de Pelargonium zonale sur les larves de Tuta absoluta

Abstract

This study aims to determine the efficacy of the treatment of Tuta absoluta (Meyrick) known as tomato leafminer with the bio-insecticide of plant origin derived from zonal pelargonium extraction in the Mostaganem region. The extraction yield obtained is 3.6%. The experiment revealed that the aqueous extract of P. zonal can constitute a very interesting means of control because it recorded a high toxicity of more than (80%) against the larvae L1 of T. absoluta in a short time and with low concentration. On the other hand, the studied plant requires an LD50 which exceeds 32% and an LD90 exceeds 52.71% to kill 50 and 90% of the treated insects.