Lutte contre les insectes phytophages par les plantes aromatiques et leurs molécules allélochimiques

Catherine Regnault-Roger (1) , A. Hamraoui

1 IPREM - Institut des sciences analytiques et de physico-chimie pour l'environnement et les materiaux

Some ethnobotanical observations show that aromatic plants are used as traditional protectants of leguminosae seeds to avoid beetles attacks in southwestern France. The efficiency of this method was tested in laboratory. Aromatic plants present a double insecticidal effect : by direct toxicity on adults and also inhibition of the reproduction. The most efficient plants belong to Labiatae family. The insecticidal effect of water extracted and residual botanicals were tested. Several allelochemicals, especially monoterpenes and polyphenols, synthetized by the plants' secondary metabolism, are involved in this toxicity. The toxic ecochemical activity of these compounds could be considered as alternative or complementary method to classical pesticides for a better insect pest management.

Domaines: Biologie végétale

Catherine Regnault-Roger, A. Hamraoui. Lutte contre les insectes phytophages par les plantes aromatiques et leurs molécules allélochimiques. Acta Botanica Gallica, 1997, 144 (4), pp.401-412. ⟨hal-01557891⟩