Journal of the Rubber Research Institute of Sri Lanka
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Item Acclimatization of micropropagated plants of Hevea(Rubber Research Institute. Agalawatta, 1993) Seneviratne, P.; Wijesekera, G.A.S.; De Soysa, G.M.In vitro produced Hevea shoots were successfully acclimatized to outdoor conditions by controlling the ambient conditions, mainly the humidity. Shooots, longer than 5 cm and with some leaves attached performed better. Shoots without roots produced shoots soon after their transfer to soil and the root development and the acclimation succes was better than in the rooted shoots. Use of a concentrated auxin solution, to soak the bases of the shoots or to incoroperate into soil improved root induction. The growth of the aerial part and the root system of the micropropagated plants were comparable to those of embryo cultured plants, up to one year of growth, but the field performance is yet to be monitored.Item Accumulation of free proline in bark and latex of Hevea brasiliensis affected by brown bast(Rubber Research Institute. Agalawatta, 1986) Wickramasinghe, S.I.; Yapa, P.A.J.; De Soysa, T.V.W.Free proline accumulation in clone RRIC 101 of Hevea brasiliensis was investigated. The bark and the latex samples collected from both healthy and brown bast effected trees were analysed for free prline content. The average bark proline concentration/unit present in the brown bast trees was found to be considerable higher (P = 0.10) than that of healthy trees. The accumulation of free proline in latex was found to be significant in brown bast trees.Item Adaptability of recently recommended rubber clones for agro-climatic variability of Sri Lanka(Rubber Research Institute . Agalawatta, 2005) Withanage, S.P.; Attanayake, D.P.S.T.G.; Karunasekera, K.B.A.Item Adoption of different tapping systems in the rubber industry of Sri Lanka with special reference to low frequency tapping(Rubber Research Institute . Agalawatta, 2007) Rodrigo, V.H.L.Item Agronomic and economic benefits of high density banana intercropping during the immature period of rubber with particular emphasis on smallholders(Rubber Research Institute. Agalawatta, 2000) Rodrigo, V.H.L.; Stirling, C.M.; Samarasekera, R.K.; Kariyawasam, L.S.; Pathirana, P.D.Item Agronomic and economic viability of rubber (Hevea brasiliensis Muell. Arg.) cinnamon (cinnamonum verum J Pres.) intercropping systems involving wider inter -row spacing in rubber plantations(Rubber Research Institute. Agalawatta, 2003) Pathiratna, L.S.S.; Edirisinghe, J.C.Item Agronomic researches of IRCA in exploitation(Rubber Research Institute. Agalawatta, 1973) Du Plessix P. Gener-C. J.Item An analysis of growth patterns of Hevea clones(Rubber Research Institute. Agalawatta, 1988) Margret, H.A.W.; Abeyasekera, S.; Jayasekera, N.E.M.Four girth measurements collected over four years, before tapping from ten Hevea clones grown in two sites have been analysed to study the growth pattern. Year to year variation in both sites was mainly due t linear component of growth. Growth of individual clones too was mainly due to linear effect. But some clones in one site showed significant quadratic and or cubic component. This was due to non linear growth of plants in some plots. Ten clones have been groued (a) according to the when averaged over four years so that clones within a group have the same average girth and (b) on the gradient of the regression fitted to the girth measurement increasing over the four years. RRIC 52 had the fastest growth in both sites. RRIC 103 had the same growth rates in both sites suggesting that it has a greater stability to local environmental changes.Item Analysis of ranking exercises in participatory rural appraisal (PRA). a case study from the smallholder rubber sector(Rubber Research Institute. Agalawatta, 2005) Wijesuriya, W.; Thattil, R.O.Item An analysis of the economic prospects of the rubber industry(Rubber Research Institute. Agalawatta, 1971) Dissanayake, A.B.Item Antimucin - a new water miscible fungicide for the control of black stripe(Rubber Research Institute. Agalawatta, 1959) Riggenbach, A.Item An assay of growth inhibitors in seed oil and normal and diseased (Brown bast) bark of Hevea(Rubber Research Institute. Agalawatta, 1973) Ratnayake, C.M.B.Item Assessment of the incidence of Oidium leaf fall and economics of its control in the smallholdings(Rubber Research Institute. Agalawatta, 1971) Liyanage, A. De S.; Peries, D.S.; Sebastian, R.D.Item Bacterial coagulation of latex(Rubber Research Institute. Agalawatta, 1971) Satchuthananthavale, R.; Satchuthananthavale, V.Item The biotic effect of the surface microflora on phytophthora meadii infection of rubber petioles(Rubber Research Institute . Agalawatta, 2002) Jayasinghe, K.E.; Wijesundera, R.L.C.; Thennakoon, B.I.; Silva, N.Item Black root disease of Hevea caused by Xylaria thwaiiesii(Rubber Research Institute. Agalawatta, 1971) Munasinghe, H.L.Item Black stripe or bark rot of Hevea(Rubber Research Institute. Agalawatta, 1971) Satchuthananthavale, V.Item Blends of acrylonitrile butadiene rubber/superior processing/natural rubber and poly(vinyl chloride) Part I. a study of some of the technological properties of NBR/SP rubber/NR/PVC blends(Rubber Research Institute. Agalawatta, 1999) De Silva, K.G.K.; Karunanayake, L.; Muttukkrishnan, K.The advantage s of using superior processing(SP)rubber in place of natural rubber (NR) in blends with NBR and NBR/PVC is discussed here in derail.various technological properties such as tensile,resilience,hardness,compression set,specific gravity,cross-lind density and resistance to oil were measured and compared. It is advantageous to use SP rubber in place of NR in the above blends probably due to higher cross-link density in the SP rubber component when compared to NR. It may be possible to use the ternary blends of SP/PVC? NBR in manufacture of injection moldable and recyclable products due to their thermoplastic natureItem Breaking dormancy in seeds of cover legumes(Rubber Research Institute of Sri Lanka. Agalawaththa, 1976) Waidyanatha, U.P. de S.; Ariyaratne, W.A.Item CABOOK or laterite in relation to the soil survey of the rubber growing districts(Rubber Research Institute. Agalawatta, 1959) Jeevaratnam, A.J.