Tropical Agricultural Research

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Toxicity and mode of action of neem (Azadirachta indica A. Juss) formulation on rice brown planthopper (Nilaparvata lugens stal.)
(Postgraduate Institute of Agriculture, University of Peradeniya:Peradeniya, 1991) Sivasubramaniam, W.; Kudagamage, C.; Wijayagunasekera, H.N.P.
Evaluation of silk yield characters using biparental progenies of silkworms (Bombyx mori)
(Postgraduate Institute of Agriculture, University of Peradeniya:Peradeniya, 1991) Ranatunga, R.M.A.C.; Perera, A.L.T.; Wijayagunasekera, H.N.P.