Acaricidal Activity of Petroleum Ether Extract of Leaves of Tetrastigma leucostaphylum (Dennst.) Alston against Rhipicephalus (Boophilus) annulatus oleh T. P. Adarsh Krishna, T. P. Ajeesh Krishna, N. D. Chithra, P. E. Deepa, U. Darsana, K. P. Sreelekha, Sanis Juliet, Suresh N. Nair, Reghu Ravindran, K. G. Ajith Kumar, Srikanta Ghosh