Ruta chalepensis (L.): Phytochemical study and bioinsecticidal effect against Tribolium castaneum (Herbst.)

Abstract

Under favorable conditions, food stocks suffer attacks from insects, including Tribolium castaneum (Herbst.). The methods used to limit losses generally are based on chemical pesticides; however, the inconsiderate use of these insecticides causes various problems. Thus, the use of plants with insecticidal properties represents an alternative solution of chemical control. In this context, we evaluated the insecticidal potential of the powder of the aerial part of Ruta chalepensis L. on adult stage of Tribolium castaneum (Herbst.), without separation of sex. The result showed a total mortality obtained after 22 days with a dose of 2g. Indeed, the values of lethal Time TL50 and TL99 are very significantly different from one dose to another. However, aqueous extracts have no effect. The phytochemical study of Ruta chalepensis L. shows its richness in polyphenolic substances, triterpenes and alkaloids. The polyphenol content is related to the extraction method. The decoction shows more efficiency.