Insecticidal activity of four medicinal plant powders and extracts against Angoumois grain moth, <i>Sitotroga cerealella</i> (Olivier) [Lepidoptera: Gelechidae]

Abstract

Powders and extracts prepared from Capsicum frutescens, Cymbopogon citratus, Moringa oleifera, Anacardium occidentale were tested for their insecticidal potential against Angoumois grain moth, Sitotroga cerealella. The powder of C. frutescens had the highest mortality rate of 100% after 2 days of application at all tested concentrations. The extracts killed all the adult moths introduced at all tested concentrations. The survival of the moth from egg to adult when treated with the plant powders showed significantly greater mortality. Extracts of all the tested plants were toxic to adult moths and also prevent hatching of the eggs of S. cerealella..

Extracts of medicinal plants as entomocide against <i>Sitotroga cerealella</i> (Olivier) infestation on paddy rice

“…This result was in accordance with the findings of Patra et al (2012) and Zeeshan et al (2012) in which methanolic extracts of some plants were found to be effective against Staphylococcus epidermidis than other extracts. The result of this work agreed with the research of Ileke (2013) in which the extracts and powders of different plant were found to reduce adult emergence of S. cerealella infesting wheat grains.…”

“…Rice being one of the world staple foods has been infested by a wide range of insect pests in storage including Sitotroga cerealella (Olivier), Sitophilus oryzae L., S. granarius L., Ryzopertha dominica F. , as well as Scirpophaga incertulas and Scirpophaga innotata (Ashamo and Akinnawonu, 2012;Sarwar, 2012;Ileke, 2013). These insects attack paddy rice both on the field and in storage and brought about diminution of this important crop marketability.…”