Insecticidal Activity of Essential Oil from Juniperus communis L. subsp. hemisphaerica (Presl) Nyman against Two Stored Product Beetles
Ecologia Balkanica;Jun2014, Vol. 6 Issue 1, p87
In the current study, insecticidal activity of essential oil from fruits of Juniperus communis L. subsp. hemisphaerica (Presl) Nyman was evaluated against Rhyzopertha dominica (F.) and Tribolium castaneum (Herbst) by fumigation at 24, 48, and 72 h exposure times. Dry fruits were subjected to hydrodistillation using a Clevenger-type apparatus and the chemical composition of the volatile oil studied by gas chromatography-mass spectrometry (GC-MS). The major components were identified Î±-pinene (59.70%), and limonene (9.66%). Insecticidal activity was varying with essential oil concentration and exposure time. Results showed that R. dominica is more susceptible than T. castaneum for all exposure times. LC50 values at 24 h were estimated 36.96 Âµl/l air for R. dominica, and 107.96 Âµl/l air for T. castaneum. These results suggested that J. communis subsp. hemisphaerica fruit oil may have potential as a control agent against R. dominica, and T. castaneum.