L’effet bio-insecticide de l’extrait méthanoïque du Ricinus communis L. Sur les larves de Tuta absoluta

Abstract

The goal of this work is to suggest the alternative solutions based on the use of natural products such as bio-insecticides to control tomato leaf miner Tuta absoluta which represents a risk to the tomato harvesting in Algeria. To achieve this goal, we evaluated methanoic extract of Ricinus communis L., a plant that thrives spontaneously in Mostaganem area. The extract yield obtained (Soxhlet extraction) diluted to different concentrations successively (10%, 20%, 30%, 40%) by spraying the larvae of T. absoluta. LD50 was very high (exceeding 50%), while L1 and L2 larvae are the most sensitive to the extract used.