Chemical composition and efficacy of essential oil from Juniperus foetidissima Willd against the Khapra Beetle

The objective of the current study was to determine the chemical constituents and fumigant toxicity of the essential oil isolated by hydrodistillation form Juniperus foetidissima. The chemical composition of the essential oil was determined by GC and GC-MS. The essential oil included large amounts of monoterpenes 51.4%, with citronellol being the major compound thereof, and sesquiterpines 42.4%. The fumigant toxicity of the essential oil was tested against larvae of the stored-product insect (Trogoderma granarium). Essential oil showed various levels of activities, Exposure to vapours of essential oil resulted in about 98 % mortality of the larvae at a concentration of 65 μl/160 cm3 air, at 48h-exposure period. Essential oils of J. foetidissima showed a high killing activity with an LC50 value of 26, 9 μl/l air. The above results showed that there is a potential for using essential oil from J. foetidissima for management of khapra beetle populations in stored-product.