Ethanolic extract of Cedrela odorata and Delonix regia for the control of Anthonomus eugenii

Abstract

In recent decades, studies of plant-based products in their chemical part have been intensified, with an emphasis on secondary metabolites, which are involved in biological pest control and in some cases by activating defense processes in the providing preventive protection. This study evaluated the bioactivity of cedar (Cedrela odorata) and flamboyant (Delonix regia) extracts on adults of pepper weevil (Anthonomus eugenii). Mortality and repellency bioassays were performed in 150 ml volume bottles with various concentrations of extracts. The bioassays were completely random, with four repetitions for each treatment. In the assessed concentrations of Cedrela odorata, the mortality rate ranged from 20 to 30% of exposed insects. Concentrations of Delonix regia extract have mortality effect on Anthonomus eugenii from 76% to 85% on individuals exposed in the test. With regard to the repellency effect, the extracts of both plants had low effectiveness.