334/18 | General Article | Veterinary Parasitology
In vitro Acaricidal Effect of Aqueous Leaf Extract of Nicotiana tabacum on Brown Dog Tick, Rhipicephalus sanguineus
N. Jeyathilakan, S.T. Bino Sundar, A. Sangaran and Bhaskaran Ravi LathaDepartment of Veterinary Parasitology, Madras Veterinary College, TANUVAS, Chennai-600 007, Tamil Nadu
Published in the Indian Veterinary Journal April 2019 : 96 (4) - pages 17 to 18(Received: September, 2018, Accepted: November, 2018)
Abstract
The in vitro acaricidal property of the aqueous leaf extract of Nicotiana tabacum on brown dog tick, Rhipicephalus sanguineus was evaluated. The effect of extract on mortality of adults and the ova of ticks was evaluated at the concentration of 25%, 50% and 100% in comparison with the standard acaricide deltamethrin and water. The extract at 50% and 100% concentration caused 100% mortality in adult ticks on 10th day of exposure when compared to deltamethrin which caused immediate knock down effect. Treated ticks were comparatively less active with poor motility and pedal reflexes. Treated female ticks did not oviposit at the concentration of 50% and 100% and hatching of eggs also was prevented even after two weeks. Tobacco leaf extract could be tried as acaricide for field use on dogs to control ticks
Key Words: Nicotiana tabacum, Rhipicephalus sanguineus, acaricide, in vitro