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Repellent effectiveness of seven plant essential oils, sunflower oil and natural insecticides against horn flies on pastured dairy cows and heifers
Abstract Plant essential oils (basil, geranium, balsam fir, lavender, lemongrass, peppermint, pine and tea tree), mixed with either sunflower oil or ethyl alcohol, were applied at 5% concentrations to the sides of Holstein cattle. Pastured cattle treated with essential oils diluted in sunflower oil had less flies than the untreated control for a 24‐h period. However, the essential oil treatments were not significantly different than the carrier oil alone. Barn‐held heifers treated with essential oils and sunflower oil alone had significantly less flies than the untreated control for up to 8 h after treatment. Basil, ...
Source: Medical and Veterinary Entomology - December 1, 2013 Category: Veterinary Research Authors: S. LACHANCE, G. GRANGE Tags: Original Article Source Type: research

Chemical composition and mosquito repellency of essential oil of Conyza newii propagated in different geographical locations of Kenya
In this study, the chemical composition and repellency of essential oils of the plant seedlings collected from West Pokot (35°E, 1°N) and propagated in seven different geographical regions of Kenya [West Pokot (35°E, 1°N), Kilome (37°E, 1°S), Naivasha (36°E, 0°), Webuye (34°E, 1°N), Nyakach (34°E, 0°), Kericho (35°E, 0°) and Nairobi (36°E, 1°S)] were compared. There were significant variations (P < 0.01, 95% CL) in the relative proportions of the six constituents and this was reflected in the repellency of the essential oils (P < 0.01, 95% CL). Higher repellency of the oil was associated with ...
Source: Medical and Veterinary Entomology - November 25, 2013 Category: Veterinary Research Authors: W. P. MAYEKU, N. I. OMOLLO, O. J. ODALO, A. HASSANALI Tags: Original Article Source Type: research