Journal of the Rubber Research Institute of Sri Lanka
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Item Effect of tapping rest during wintering months on latex yield and tapping panel dryness in three rubber (Hevea brasiliensis) clones(Rubber Research Institute:Agalawatta, 2020) Seneviratne, P.; Nayanakantha, N.M.C.; Samarasekara, R.K.; Watawala, W.K.S.W.Item Effectiveness of commercially available selected water-based and oil-based ethephon formulations as a yield stimulant of rubber (Hevea brasiliensis)(Rubber Research Institute:Agalawatta, 2017) Karunarathne, N.P.S.N.; Fernando, L.T.B.K.; Kudaligama, K.V.V.S.; Lakmini, W.G.D.; Abewardhana, N.N.; Madushani, P.D.T.L.; Perera, M.K.P.; Seneviratne, P.; Rodrigo, V.H.L.Item Effectiveness of a locally developed ethephon formulation on yield and related latex physiological factors of Hevea brasiliensis(Rubber Research Institute:Agalawatta, 2017) Fernando, L.T.B.K.; Kudaligama, K.V.V.S.; Fernando, T.H.P.S.; Lakmini, W.G.D.; Somasiri, H.P.P.S.; Karunarathne, N.P.S.N.; Fernando, K.M.E.P.; Attanayaka, A.P.; Rodrigo, V.H.L.; Seneviratne, P.Item Impact of tapping quality and harvesting practices on the sustainability of the rubber industry in Sri Lanka(Rubber Research Institute:Agalawatta, 2017) Seneviratne, P.; Silva, T.U.K.; Amaratunga, K.A.G.B.; Karunasena, R.P.; Samarasekara, R.K.; Kariyawasam, L.S.; Perera, M.K.P.; Pathirana, P.D.; Karunatilake, P.K.W.Item Effect of method of transplanting young budded plants on growth of rubber tree (Hevea brasiliensis Muell. Arg.)(Rubber Research Institute:Agalawatta, 2017) Seneviratne, P.; Nakandala, S.A.; Weerakoon, U.S.; Handapangoda, R.Item The effect of the container and the potting media of nursery plants on the growth of rubber plants: experience with root trainers to raise rubber plants(Rubber Research Institute:Agalawatta, 2017) Seneviratne, P.; Wijesekara, G.A.S.Item Seed production of clones PB 86, RRIC 100 and RRIC 121 in three rubber growing areas of Sri Lanka(Rubber Research Institute. Agalawatta, 1997) Seneviratne, P.; Nugawela, A.; Amaratunge, K.A.G.B.; Karunasena, R.P.; Wilbert, S.The rubber seed production in wet rubber growing areas in Sri Lanka has gone to very low levels in the recent past affecting the culling process that should be adopted in establishing rootstock nurseries.From the three rubber growing areas studied satisfacton seed production irrespective of the clone was observed only in Kegalle region.Regional differences may be due to direct or influences of the climate and weather during flowering and pod set. Clonal differences seems to be existing in regions where climate or the weather is favourable for spread of diseases.Further RRIC 100 being a resistant clone for oidum and phytopthora.produced a higher percemage of good quality seeds compared with the other two clones.PB 86 and RRIC 121 which have below average tolerance to these two diseases.However currently country as a whole produces enough seeds to fulfill country's annual seed requirement for the production of rootstocks provided the seeds are collected and transported without delayItem Factors affecting the budgrafting success and the scion growth of young budding of Hevea(Rubber Research Institute. Agalawatta, 1994) Seneviratne, P.; Nugawela, A.; Samarakoon, S.M.A.The size of the bag in which the stock plant is grown seems to have an effect on the growth of the seedling; from the three bag sizes tested, ie 15 x33 cm, 18 x 38 cm, 23 x 45 cm, it was found that the diameter the number of leaf whorls of the seedling increased with the increase of the bag size.Though the differences are not statistically significant, the budding success too increased in the same pattern. There was no effect of the bag size on the growth of the scion. The two types of buds, axillary scale, showed no difference either on bud grafting success or on the growth of the scion. The growth stage of the top most leaf whorl of the stock plant, either mature or immature, had no effect on the peeling qualities budgrafting success though a little higher budgrafting success was seen when the top flush was immature. There was an effect of the snag, on the scion growth; when the snag was shorter the sprouting took place earlier but, the scion growth was slightly poor as was evident by the diameter the length of the scion. Long snags delayed the sprouting , but the scion growth was better. The best growth of the scion was obtained when the snag was long with a few leaves attached to it.Item The problem of surface sterilization of shoot materials of Hevea(Rubber Research Institute of Sri Lanka. Agalawatte, 1995) Seneviratne, P.; Flegmann, A.W.; Wijesekera, G.A.S.Item Root system of Hevea with special reference to micropropagated plants(Rubber Research Institute of Sri Lanka. Agalawatte, 1995) Seneviratne, P.; Wijesekara, G.A.S.; De Soysa, G.M.