Paper Information

Journal:   IRANIAN JOURNAL OF MEDICINAL AND AROMATIC PLANTS   2014 , Volume 30 , Number 2 (64); Page(s) 332 To 341.
 
Paper: 

REPELLENT ACTIVITY AND PERSISTENCE OF ESSENTIAL OILS FROM EUCALYPTUS CAMALDULENSIS DEHNH. AND CALLISTEMON VIMINALIS (GAERTN.) G. DON ON SOME SPECIES OF STORED-PRODUCT BEETLES

 
 
Author(s):  HAMZAVI F., MOHARRAMIPOUR S.*, TALEBI A.A.
 
* DEPARTMENT OF ENTOMOLOGY, FACULTY OF AGRICULTURE, TARBIAT MODARESUNIVERSITY, TEHRAN, IRAN
 
Abstract: 

Tribolium confusum Jacquelin du Val., Sitophilus granarius L. and Oryzaephilus surinamensisL. are the most important stored-product pests on stored wheat. This research was aimed to investigate the repellency effect of Eucalyptus camaldulensis Dehnh. and Callistemon viminalis (Gaertn.) G. Don essential oils against the above mentioned insects. Essential oils were obtained from dry leaves of Eucalyptus camaldulensis Dehnh. and Callistemon viminalis (Gaertn), subjected to hydrodistillation using a modified Clevenger. The Y-tube olfactometer bioassay was used to test the repellency of essential oils. Different concentrations of essential oils (4-10 ml) were prepared by dissolving in 50 ml acetone and mixing with 2 g wheat kernels. The highest repellency of E. camaldulensid and C. viminalis essential oils were obtained at concentration levels of 90% and 70% for T. confusum, 60% and 35% for S. granarius and 60% and 53% for O. surinamensis, respectively. Results indicated that the essential oils were more repellent to T. confusum as compared to S. granariu and O. surinamensis. At a concentration of 35.71 ml/l. air, the half-life time of E. camaldulensis essential oils (3.79 days) was as long as C. viminalis (4.34 days) on T. confusum. The persistence of E. camaldulensis essential oils (4.40 days) was significantly longer than that of C. viminalis (2.15 days) on S. granarius. Findings indicated that the tested essential oils in protected areas had substantial repellency even at low concentrations; however, they were less persistent compounds, broken down more quickly.

 
Keyword(s): ESSENTIAL OIL, REPELLENCY, STORED PRODUCT PESTS, OLFACTOMETER, PERSISTENCE
 
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