Toxicity and repellent activities of Thymus pallescens and Cymbopogon citratus essential oils against Sitophylus granarius

This study evaluated the toxicity and repellent activities of essential oils (EOs) against Sitophilus granarius (Linnaeus, 1758), both in vitro vivo conditions. The EOs obtained from Thymus pallescens No??. (Lamiaceae) Cymbopogon citratus Stapf. (Poaceae) were analyzed by GC-MS, revealed that carvacrol (56.64%) geraniol (20.8%) as respective major components. T. EO was found to be a more effective toxicant, with LC50 LC90 values 9.3 34.6 µL/mL, respectively, contact test vs 8.2 25.3 µL/mL fumigation test. showed also stronger effect ranging 83.4% 100%. In test, survival probability decreased 99.9 2.48% among insects exposed EO. These data demonstrated could considered alternatives chemical insecticides, providing pest control for stored products an ecologically sustainable manner.