Repellency of three plants extraction against Oryzaephilus surinamensis and Oryzaephilus mercator (Coleoptera: Silvanidae)

Abstract

Three plant extraction of Caraway (Carum carvi), Ginger (Zingiber officinale) and Cardamom (Elettaria cardamomum) were studied in the laboratory for repellency effect against Saw-Tooth grain beetle adult and Larvae, Oryzaephilus surinamensis and Oryzaephilus mercator. Two concentration of every plant extract (5, 10 µl/ml) were examined and ten replications were used for each dose of all the plant extracts and tested in Petri dishes. Results demonstrated that extracts of Caraway and Ginger had higher repellent effect on larvae and adult of O. surinamensis and O. mercator than that of Cardamom. Pronounced increase of repellency was detected for all plant extracts with increasing time of exposure and concentrations. According to the studies, the plant extracts of Caraway and Ginger can be utilized in protection of O. surinamensis and O. mercator and suitable replace for artificial pesticides.