4.Journals Published in Sri Lanka
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Item Plant growth substances in agriculture(Rubber Research Institute of Sri Lanka. Agalawatta, 1985) Samaranayake, C.Item Budwood Nurseries(Rubber Research Institute. Agalawatte, 1986) Samaranayake, C.Item Shoot tip culture as a method of micropropagation of Hevea(Rubber Research Institute. Agalawatta, 1988) Gunatilleke, I.D.; Samaranayake, C.Shoot tips of Hevea from aseptically grown seeedlings were established in culture on Murashige and Skoog (MS) liquid medium with half strenth salts, supplimented with BAP +IBA or MS solid medium, with full strenth salts with and without BAP + IBA. BAP was found to be better for axillary bud proliferation and growth than the other cytokinines. Proliferation of buds improved with successive subcultures. A multiplication rate of 30 + 2 shoots per explant was obtained with threee subcultures in 165 daysItem Virgin bark tapping of some RRIC 100 series clones(Rubber Research Institute. Agalawatta, 1987) Samaranayake, C.; Waidyanatha, U.P. De S.; Pathiratne, L.S.S.; De Soysa, A.G.A.All RRIC 100 series clones reached tappability much earlier than the two control clones viz. RRIM 600 and PB 86. Significantly higher yield per tree per tapping was obtained in the first year on a 1/2 S d/3 system compared to 1/2S d/2 tappings in many of the clones tested. However, during the second year there was no significant differences in yields obtained on both frequencies indicating that the tree was able to replenish the latex removed in a tapping, much faster than in the first year of tapping. The data presented indicate the possibility of tapping all recommended clones on 1/2S d/32 system of tapping from the second year, without any adverse effects.Item On the estimation of leaf areas of some selected Hevea clones(Rubber research Institute. Agalawatte, 1984) Wickremasinghe, W.N.; Samaranayake, C.; Abayapala, R.A.P.Item Effect of the rootstock and scion on bud emergence of Hevea budgrafts(Rubber Research Institute. Agalawatta, 1980) Samaranayake, C.; Abeywardena, V.; Gunaratne, R.B.; Bandara, K.A.G.