R.M. Dharmadasa

Herbal Technology Section, Industrial Technology Institute, Bauddhaloka Mawatha, Colombo 7, Sri Lanka

R.M.D.H. Rathnayake

Department of Plantation Management, Faculty of Agriculture and Plantation Management, Wayamba University of Sri Lanka, Makandura, Gonawila (NWP), Sri Lanka

D.C. Abeysinghe

Department of Plantation Management, Faculty of Agriculture and Plantation Management, Wayamba University of Sri Lanka, Makandura, Gonawila (NWP), Sri Lanka

S. A. N. Rashani

Herbal Technology Section, Industrial Technology Institute, Bauddhaloka Mawatha, Colombo 7, Sri Lanka

K. Samarasinghe

Herbal Technology Section, Industrial Technology Institute, Bauddhaloka Mawatha, Colombo 7, Sri Lanka

A.L.M Attanayake

Herbal Technology Section, Industrial Technology Institute, Bauddhaloka Mawatha, Colombo 7, Sri Lanka