Rubber Research Institute of Sri Lanka

Ministry of Plantation Industries



Biochemistry and Physiology Department

This department aims to meet the needs of stakeholders in the rubber industry particularly in the biochemical and physiological aspects.  Ultimate focus is to build up a cleaner environment with productivity goals in the present day context.  Among the research programs, testing low frequency tapping systems with different methods of stimulation and developing convenient and reliable means of assessing rubber content in latex are in priority

Senior Research Officer

Dr. (Mrs) Sagari Kudaligama. MPhil, PhD
vskudaligama[at]yahoo.com

Dr. (Mrs.) Sagari Kudaligama serves as a Senior Research Officer in the Department of Biochemistry and Physiology at RRISL. She obtained her BSc degree from the University of Colombo, Sri Lanka in 1996. She has made a significant contribution on developing low cost treatment facilities for rubber factory wastewater and obtained her MPhil degree in this discipline from the University of Sri Jayawardenepura. Outputs of the research carried out on developing low intensity harvesting systems leading to her PhD has been awarded the National awards for excellence in agricultural research in Sri Lanka, 2014. Her present interests are on productivity improvement through investigating biochemical and physiological aspects of rubber tree in relation to different agronomic practices, climate change and suboptimal climatic conditions in marginal rubber lands and abiotic stresses. In addition, she also engages in research work on rubber wood. She has published more than 50 research articles and obtained two patents for scientific innovations.

 

Research Officer

Ms. N. P. Surani Karunarathne. BSc (Hon)
suranikarunarathne[at]yahoo.com

She is working as a research officer at department of biochemistry and physiology, Rubber Research Institute of Sri Lanka covering the research areas of biochemistry and physiology of rubber plant, latex and wood. She obtained B.Sc. (Honours) degree with the specialization in plant biotechnology from University of Colombo, Sri Lanka in 2015. Her current research interests include latex discoloration, plant biochemistry, plant physiology, wood biochemistry and plant stress physiology.

 

Research Highlights & New Recommendations

  • Low intensity harvesting i.e. S/2 d4 and S/4 d3 tapping systems for rubber
  • Temperature corrected Ready-reckoner chart for determination of DRC with metrolac
  • Gaseous stimulation protocol for Sri Lankan Hevea genotypes

Research conducted on developing low intensity harvesting systems by Dr V H L Rodrigo and Dr (Mrs) K V V S Kudaligama was honoured by the National Awards for Excellence in Agricultural Research offered by the Sri Lanka Council for Agricultural Research Policy.

Dr. (Ms.) K. V. V. S. Kudaligama has won the GRC Postgraduate award 2015 awarded by the Sri Lanka Association of Advancement of Science.

Patents / Industrial Designs

  • M.T. Warnakula, K.V.V.S. Kudaligama, D. Ramawikrama, P.D.J. Rodrigo - In-situ coir based biological odour filter for controlling the odour from wastewater treatment facilities and polluted natural environments (Patent No. 11532)
  • Eco-friendly sealant from an industrial waste for fixing rain guards on rubber trees -  Patent No. 14093
  • Low intensity harvesting to Improve sustainability of rubber farming
  • Research and development on biochemical and physiological aspects to improve the sustainability of rubber farming
  • Research & development on rubber latex to identify best genotypes that produce quality raw rubber during screening process.
  • Research & development on rubber wood
  • Development of a protocol for local production of ethephon stimulant

Analytical services

Dry Rubber Content (DRC) of latex (Rs. 700/sample)
2-cloroethylephosphonic acid content of commercial ethephon products (Rs. 1250/sample)
Latex diagnosis (latex sucrose, inorganic phosphourous, thiol, total solid contents and pH)
Rs. 5000/field

Advisory (free of charge)

Advice on problems associated on low intensity harvesting with ethephon
Gaseous stimulation based low intensity harvesting systems
Problems associated with biochemical and physiological aspects of plant, latex and wood

 

Publications in refereed journals

Citation index expanded

  1. Rodrigo, V.H.L., Kudaligama, K.V.V.S., Fernando, K.M.E.P. and Yapa, P.A.J.  (2012). Replacing traditional half spiral cut by a quarter cut with Ethephon; a simple approach to solve current issues related to latex harvesting in rubber industry. Journal of National Science Foundation of Sri Lanka, 40(4), 283-291.

Other refereed journals

  1. Kudaligama, K.V.V.S., Thurul, W.M., Yapa, P.A.J (2003). Effect of nitrogen and processing chemicals on the treatment efficiency of crepe rubber factory wastewater. Journal of Rubber Research Institute of Sri Lanka. (86), 38-45
  2. Kudaligama, K.V.V.S., Thurul, W.M., Yapa, P.A.J (2005). Effect of Bio-brush medium: a coir fibre based biomass retainer on treatment efficiency of an anaerobic filter type reactor. Journal of Rubber Research Institute of Sri Lanka. (87), 15-22
  3. Kudaligama, K.V.V.S., Thurul, W.M., Yapa, P.A.J (2007). Possibility of treating rubber factory wastewater in biological reactors using media with low specific surface area, Journal of Rubber Research Institute of Sri Lanka. (88), 22-29
  4. Kudaligama, K.V.V.S., Thurul, W.M., Yapa, P.A.J (2010).  A cost effective solution for treatment of rubber factory wastewater. Journal of Rubber Research, 13(1), 18-26
  5. Rodrigo, V.H.L., Kudaligama, K.V.V.S., Fernando, K.M.E.P. and Yapa, P.A.J. (2011). Harvesting the rubber tree once in four days; a solution to the current issues in the rubber industry in Sri Lanka. Journal of Rubber Research Institute of Sri Lanka. 91, 15-35.
  6. Kudaligama, K.V.V.S., Rodrigo, V.H.L., Fernando, K.M.E.P. and Yapa, P.A.J. (2012). Effect of low frequency harvesting in Hevea brasiliensis on major raw rubber properties. Journal of Rubber Research Institute of Sri Lanka. (92), 1-11
  7. Rodrigo, V.H.L. and Kudaligama, K.V.V.S. (2012). Effectiveness of gaseous stimulation in low intensity latex harvesting in rubber plantations of Sri Lanka, Journal of Rubber Research Institute of Sri Lanka. (92), 44-61
  8. Rodrigo, V.H.L., Kudaligama, K.V.V.S., Fernando, K.M.E.P. and Yapa, P.A.J.  (2012). Replacing traditional half spiral cut by a quarter cut with ethephon; a simple approach to solve current issues related to latex harvesting in rubber industry. Journal of National Science Foundation of Sri Lanka, 40(4), 283-291.
  9. Fernando, K.M.E.P., Premasiri, H.M.R. and Kudaligama, K.V.V.S. (2016). RS and GIS techniques for assessing physiological status and productivity of RRIC 121 genotype of Hevea brasiliensis (Rubber) with different harvesting systems in low country wet zone of Sri Lanka. Journal of Tropical Forestry and Environment, 6(2), 14-24
  10. Premasiri, H.M.R., Fernando, K.M.E.P. and Kudaligama, K.V.V.S. (2016). Spatial techniques for assessing favourable topographic conditions for rubber plantation. Asian Journal of Geoinformatics, 17(1), 2017. 10-16

Publications in non-refereed journals and Bulletin

  1. Kudaligama, K.V.V.S., Wijesuriya, W., Rodrigo, P.D.J. and Ramawikrama, D., (2004). Effect of rainfall on the pollution problem associated with processing of natural rubber. Journal of National Institute of Plantation, 20(02), 19-29
  2. Kudaligama, K.V.V.S and Wijesuriya, W (2004). Pollution problem in raw rubber factories: Perception of an affected community. Journal of National Institute of Plantation, 20(02), 30-37
  3. V. H. L. Rodrigo and K. V. V. S. Kudaligama (2009) Gaseous stimulation for exploitation in rubber cultivation of Sri Lanka : An overview. The Journal of Plastic & Rubber Institute of Sri Lanka, (9), 23-35
  4. Kudaligama, K.V.V.S. and Yapa, P.A.J (2007). Wastewater treatment in rubber industry with special emphasis on anaerobic treatment. Bulletin of the rubber Research Institute of Sri Lanka, (48), 49-54
  5. Kudaligama, K.V.V.S., Thurul, W.M. and Yapa, P.A.J (2007). Coir: a versatile raw material to produce stationary media for biological wastewater treatment system. Bulletin of the rubber Research Institute of Sri Lanka, (48), 55-60
  6. Rodrigo, L. and Kudaligama, S. (2011). Another wage hike granted; what should be the next move in rubber plantations? Journal of National Institute of Plantation Management, 25(2), 39-44
  7. Rodrigo, V.H.L., Kudaligama, K.V.V.S. and Randunu, R.P.S. (2014). A success story on the development of new methods of low intensity harvesting of rubber latex in Sri Lanka. CropLife, Vol 8, pp1-5

Conference proceedings (Full papers)

  1. Warnakula, T., Kudaligama, S., Ramawikrama, D. and Rodrigo, P. D. J., (1997). Can we reduce the waste volume without affecting the quality of rubber, Proceedings of the IRRDB Symposium on the Technology & End Uses of Natural Rubber, 6th Nov., 1996, Beruwela, Sri Lanka. pp109 – 112
  2. Rodrigo, V.H.L., Kudaligama, K.V.V.S. and Samarasekera, R.K. (2006). Response of some Sri Lankan rubber clones to gaseous stimulation in tapping: a preliminary investigation, Preprints International Natural Rubber Conference. November.2006. Ho Chi Minh city, Viatnam.  pp74-87.
  3. Rodrigo, V.H.L. and Kudaligama, K.V.V.S., R. P. S. Randunu and P. D. J Rodrigo (2008). Possibility of reducing tapping frequency in Sri Lankan Hevea genotypes and its advantages. Proceedings of the Second Symposium on Plantation Crop Research. October, 2008, Colombo, Sri Lanka. pp 30-31
  4. Rodrigo, V.H.L., Kudaligama, K.V.V.S., K.M.E.P. Fernando and R. P. S. Randunu (2009). Potential use of Low Intensity Harvesting (LIH) systems to address the current issues in the rubber industry in Sri Lanka, Proceedings of the IRRDB-Natural Rubber Conference. October 2009, Bogor, Indonesia
  5. Prasanna, W. R. A. C., Rodrigo, V. H. L., Abeysinghe, D. C. and Kudaligama, K.V.V.S. (2010).  Stimulation levels to be used with low intensity harvesting (LIH) systems of rubber under wet and intermediate zones of Sri Lanka. Proceedings of the Fifteenth International Forestry and Environmental Symposium, University of Sri Jayewardenepura, Sri Lanka, pp. 265-272
  6. Kudaligama K.V.V.S., Rodrigo V.H.L., Randunu R. P. S. and Hewamanage, D. S. (2010). Commercial application of low frequency harvesting systems in the intermediate zone of Sri Lanka, Proceedings of the Third Symposium on Plantation Crop Research, Colombo, Sri Lanka. pp.100-107
  7. Kudaligama, K.V.V.S., Rodrigo, V.H.L., Fernando, K.M.E.P. and Yapa, P.A.J.(2010) Response of low frequency harvesting systems of rubber under drier climatic conditions in Sri Lanka, Proceedings of the 15th International forestry and environment symposium, University of Sri Jayewardenepura, Sri Lanka, pp. 62-69
  8. Kudaligama, K.V.V.S., Rodrigo, V.H.L., Attanayake, A. P., Rodrigo, P. D. J. and Randunu, R. P. S. (2012). Raw rubber properties of Hevea: Should it be a selection criterion in breeding and planting programmes?, Proceedings of the Third Symposium on Plantation Crop Research, Colombo, Sri Lanka. pp.157-164
  9. Rodrigo, V.H.L., Kudaligama, K.V.V.S., Fernando, K.M.E.P. and Yapa, P.A.J. (2012). Reducing the harvesting intensity provides a simple solution to the harvester shortage and related issues in the rubber industry. Proceedings of the Fourth Symposium on Plantation Crop Research, Colombo, Sri Lanka. pp.345-358.
  10. Kudaligama, K.V.V.S., Rodrigo, V.H.L., Seneviratne, W. M. G., Rodrigo, P. D. J. and Randunu, R. P. S. (2012). Rubber factory effluent as a source of potential energy. Proceedings of the Fourth Symposium on Plantation Crop Research, Colombo, Sri Lanka. pp.295-306
  11. Kudaligama K.V.V.S., Nilmini G. V. L., Rodrigo V. H. L. , Randunu, R. P. S. (2014). Temperature-corrected Ready-reckoner chart for determining dry rubber content in Hevea latex using the metrolac, Proceedings of the Fifth Symposium on Plantation Crop Research, Colombo, Sri Lanka. pp. 325-332
  12. Kudaligama K.V.V.S., Rodrigo V. H. L. , Randunu, R. P. S. (2015). Commercial application of S/2 d4 harvesting system to address current issues in rubber plantations of Sri lanka,Proceedongs of the International Rubber Conference,  2-3 November, Ho Chi Minh City, Vietnampp 386-396
  13. Lakshman R.G.N., Kudaligama K.V.V.S., Rodrigo V.H.L., Iqbal S. M. M., Nugawela A. (2016). Performance of S/2 d4 low intensity harvesting system of rubber in intermediate zone of Sri Lanka. Proceedings of the 5th YSF Symposium - 2016 of the National Science and Technology Commission, Sri Lanka, January, 2016. Colombo, Sri Lanka. pp 48-51.
  14. Lakshman, R.G.N., Kudaligama, K.V.V.S., Rodrigo, V.H.L., Iqbal, S.M.M., Attanayake, A.P., Randunu, R.P.S., Perera, M.K.P., Madushani, P.D.T.L., and Nadeeshani, A.A.A., (2016). Effectiveness of S/2 d4 harvesting system in the rubber smallholder sector of Eastern province of Sri Lanka. Proceeding of the sixth Symposium on Plantation Crop Research, Colombo, Sri Lanka.
  15. Sandaruwan P. S., Kudaligama, K. V. V. S., Nugawela, R.C.W.M.R.A., and Randunu R. P. S (2016) Effect of rainguard on some latex physiological parameters of RRIC 121 genotype of (Hevea brasiliensis) grown in low country wet zone during re-foliation period. Proceedings of the 14th Agricultural Research Symposium pp 214-218

Conference proceedings (Abstracts)

  1. Kudaligama, K.V.V.S., Rodrigo, V.H.L., K.M.E.P. Fernando, P.A.J.Yapa and R. P. S. Randunu (2008). Effect of low intensity tapping systems on latex and raw rubber properties of Hevea brasiliensis. Proceedings of the 13th International Forestry and Environment Symposium of the Department of Forestry and Environmental Science, University of Sri Jayawardhenapura, Sri Lanka., December, 2008. Kalutara, Sri Lanka
  2. Kudaligama, K.V.V.S. and Rodrigo, V.H.L. (2009). Emission reduction of green house gases using bio-fuel from rubber effluent: An assessment on Sri Lankan potential. Proceedings of the 1st National Conference on Global Climate Change and its Impacts on Agriculture and Water in the tropics, September, 2009, Kandy, Sri Lanka. pp 55
  3. Kudaligama K.V.V.S., Rodrigo V.H.L., Randunu R. P. S. and Hewamanage, D. S. (2010). Response of low frequency harvesting systems in drier climatic conditions of Sri Lanka.  Proceedings of the IRRDB Workshop on climate change and natural rubber – 2010
  4. Kudaligama, K.V.V.S., Rodrigo, V.H.L., Fernando, K.M.E.P. and Yapa, P.A.J. (2012). Performance of popular Sri Lankan Hevea genotypes with low frequency harvesting systems. Proceedings of the Young Scientists Forum Symposium 2011, Colombo, Sri Lanka, pp.31.
  5. Kudaligama, K.V.V.S., Rodrigo, V.H.L., Fernando, K.M.E.P. and Yapa, P.A.J. (2012). Low intensity harvesting of natural rubber: A financial perspective. Proceedings of the Seventeenth International Forestry and Environmental Symposium 2012 of the Department of Forestry and Environmental Science, University of Sri Jayewardenepura, Sri Lanka, pp.91.
  6. Kudaligama, K.V.V.S., Rodrigo, V.H.L., Fernando, K.M.E.P. and Yapa, P.A.J. (2013). Response of RRIC 121 clone to low frequency harvesting systems in the intermediate zone of Sri Lanka. Proceedings of the Young Scientists Forum Symposium 2012, Colombo, Sri Lanka, pp.24.
  7. Kudaligama, K. V. V. S. and Rodrigo, V. H. L. (2013). Eco-friendly sealant from fixing rainguards on rubber trees, Proceedings of the 69th Annual Sessions of Sri Lanka Association for Advancement of Science,02-06 December, Kelaniya, Sri Lanka, pp. 223
  8. Kudaligama K.V.V.S. , Rodrigo V. H. L. , Randunu, R. P. S. And Rodrigo, P. D. J. (2013). Preliminary investigations of an oil based ethephon mixture (Motex plus)on low intensity harvesting of rubber, Proceedings of the Eighteenth International Forestry and Environment symposium of University of Sri Jayawardhenepura, 10-11 January, Thulhiriya, Sri  Lankan, pp.  111
  9. Kudaligama, K.V.V.S. , Rodrigo V. H. L. , Fernando, K.M.E.P.  and Yapa, P. A. J. (2013). Profitability of adopting extended low intensity harvesting systems for rubber, Proceedings of the Eighteenth International Forestry and Environment symposium of  University of Sri Jayawardhenepura, 10-11 January, Thulhiriya, Sri Lanka pp. 118
  10. Kudaligama K.V.V.S. , Rodrigo V. H. L. , Randunu, R. P. S. (2014). Performance of S/4 d3 shorter tapping cut system in harvesting of base panel of rubber tree [Hevea brasiliensis (Willd. ex A. Juss.) Mull. Arg.], Proceedings of the SLCARP International Agricultural Research Symposium, Colombo, SriLanka pp.8
  11. Kudaligama, K.V.V.S. , Rodrigo V. H. L. , Fernando, K.M.E.P.  and Yapa, P. A. J. (2014). Response of ethephon based low intensity harvesting systems on yield associated dynamics of rubber tree, Proceedings of the International Conference on Multidisciplinary Approaches , Colombo, Sri Lanka pp.136
  12. Rodrigo V. H. L., Lakshmn, R. G. N., Kudaligama K.V.V.S., Nugawela, A. (2014). Preliminary yield performance in rubber planted in Polgahawela undr once in four day (S/2 d4) harvesting frequency. Proceedings of the Nineteenth International Forestry and Environmental Symposium  of the Department of Forestry and Environmental Science, University of Sri Jayewardenepura, 24-25 October, 2014, Sigiriya Sri Lanka, pp.121.
  13. Kudaligama, K.V.V.S., Rodrigo, V.H.L., Randunu, R. P. S., Fernando, K.M.E.P. and Yapa, P.A.J. (2014). Changes in some latex physiological parameters of rubber tree with the intensity of harvesting. Proceedings of the Nineteenth International Forestry and Environmental Symposium  of the Department of Forestry and Environmental Science, University of Sri Jayewardenepura, 24-25 October, 2014, Sigiriya Sri Lanka, pp.126.
  14. Hasanthi, P.D.M., Kudaligama, K.V.V.S. and Ampitiyawatte, A.D. (2014). Preliminary investigations on some biochemical components of rubber (Hevea brasiliensis) wood of RRIC 102 and RRIC 121 genotypes grown at Dartonfield estate, Kalutara. Proceedings of the International Forestry and Environment symposium, pp 53
  15. Lakshmn, R. G. N., Kudaligama K.V.V.S., Rodrigo V. H. L., Iqbal, S.M.M., Nugawela, A. (2015). Preliminery yield performance and latex physiological parameters of rubber (Hevea Brasiliensis) planted in Inteermediate Zone of Sri Lanka, Proceedings of the International Conference of Multi Disciplinery approaches 11-12 September, Colombo, Sri Lanka pp 191
  16. Randunu, R.P.S., Kudaligama K.V.V.S., Rodrigo V. H. L., Iqbal, S.M.M., Nugawela, A. (2015). Priliminary investigations on the changes of some physiological parameters of field grown rubber plants for the dry period in the dry zone of Sri Lanka. Proceedings of the International Conference of Multi-Disciplinary approaches 11-12 September, Colombo, Sri Lanka pp 248
  17. Lakshman, R.G.N., Rodrigo V.H.L., Kudaligama K.V.V.S., Yapa P.I. (2015). Time-caused variation in latex yield parameters of rubber (Hevea brasiliensis) in the Eastern province of Sri Lanka, Proceedings of the Twentieth International Forestry and Environmental Symposium  of the Department of Forestry and Environmental Science, University of Sri Jayewardenepura, Nigambo, Sri Lanka,
  18. Madushani, L.K.I., Kaliyadasa, P.E., Premathilake, U.G.A.T., Kudaligama, K.V.V.S.(2016). Developing a calibration curve to quantify chlorophyll content in rubber (Hevea brasiliensis), Proceedings of the 6th research symposium of Uva Wellassa University, 28-29 January  pp72.

Articles in Sinhala

  1. Jayasinghe, N., Munasinghe, C., Kudaligama, S. (1997).Rainfall pattern in rubber growing areas in Sri Lanka, Rubber Puwath, Vol. 20, 14 - 21
  2. Kudaligama, S., Rodrigo, P.D.J., Ramawikrama, D. (1999). Pollution problem pertaining to rubber industry, Rubber Puwath, Vol. 22, 5 - 7
  3. Rodrigo, P.D.J., Kudaligama, S., Ramawikrama, D. (1999). Biological methods for rubber factory wastewater treatment, Rubber Puwath, Vol. 22, 8 – 11
  4. Kudaligama K.V.V.S. , Rodrigo V. H. L. , Randunu, R. P. S. (2010). Facts to be considered in the usage of ethylene for high productivity, Rubber Puwath, Vol. 27, 24-29

Others

  1. Kudaligama, K. V.V.S (2004). Effect of rainfall on the pollution problem associated with natural rubber processing, Climate Change Secretariat Working Paper No:32, Environmental Economics and Global Affaires Division, Ministry of Environment and Natural Resources, Sri Lanka.
  2. Kudaligama, K.V.V.S (2004). Effectiveness of coconut fibre media on biological wastewater treatment of rubber factory effluent, Thesis submitted for award of Degree of M.Phil in Botany, Department of Botany, University of Sri Jayawardenapura.
  3. Kudaligama, K.V.V.S (2004). Effectiveness of low intensity tapping suitable for rubber (Hevea) low country wet zone of Sri Lanka, Thesis submitted for award of Degree of PhD in Botany, Department of Botany, University of Sri Jayawardenapura.

For Information

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Contact Info

  • Rubber Research Institute of Sri Lanka.
  • Dartonfield, Agalawatta. 12200
  • 034 - 2247426, 034 - 2247383
  • 034 - 2248459, 034 - 3439999
  • 034 - 2247427
  • dirrri@sltnet.lk