(Postgraduate Institute of Agriculture, University of Peradeniya:Peradeniya, 2004) Weerasinghe, O.R.; Perera, A.L.T.; De Costa, W.A.J.M.; Jinadase, D.M.; Vishnukanthasingham, R.
(Postgraduate Institute of Agriculture, University of Peradeniya:Peradeniya, 2006) Millawithanachchi, M.C.; Perera, A.L.T.; Peiris, B.C.N.; Fonseka, H.M.
