Research Publications

  1. De Vaz, K.P.U. de Silva and L.H.P. Gunaratne. 1982. Agronomic and economic studies of Cassava legume intercropping system. Tropical Agriculturist Vol. 138:110-116.
  2. K.P.U. de Silva,  G.S. Premachandra and A. Prematilake. 1983. Effect of N fertilizer and method of control of vine growth on tuber yield of Sweetpotato. Journal of Agriculture Science, Vol. 20:97-104.
  3. K.P.U. de Silva,  S. Ekanayake, C.K. Ranaweera and J.C.K. Basnayake. 1984. Preliminary evaluation of 8 Cocoyam cultivars under Mid Country condition. Proc. Sri Lanka Ass. Advancement Sci. 40 (1). 
  4. K.P.U. de Silva,  P.S. A.D.  Prematilake  and J.C.K. Basnayake. 1984. Determination of maturity parameters at different growth stages in selected Cassava cultivars. Proc. Sri Lanka Ass. Advancement Sci. 5: 40 (1). 
  5. K.P.U. de Silva,  P.S. A.D.  Prematilake. 1984. Cassava - Legume intercropping systems: Effect on spatial arrangement on crop yield and utilization. Proc. Sri Lanka Ass. Advancement Sci. 
  6. Jayawardana, S.D.G., K.P.U. de Silva and J.C.K. Basnayake. 1984. Potentiality of growing vegetables Cassava in Mid Country. Proc. Sri Lanka Ass. Advmt. Sci. 40(1).
  7. Ekanayake, S., V. Nithinada and K.P.U. de Silva. 1984. Evaluation of storage methods of sweetpotato. Proc. Sri Lanka Ass. (Advmt. Sci. 4091).
  8. Prematilake, P.S.A.D. and K.P.U. de Silva. 1984. Mix Cropping of sweetpotato with grain legume. Proc. Sri Lanka Ass. Advmt. Sci. 40(1). 
  9. Ekanayake, S., K.P.U. de Silva and C.K. Ranaweera. 1984. Evaluation of Dioscoria cultivars. Proc. Sri Lanka Ass. Advmt. Sci. 40(1). 
  10. De Silva, K.P.U., S.D.G. Jayawardana, J.C.K. Basnayake and R. Gunatunge. 1985. Success in varietal improvement in Sweetpotato by hybridization. Proc. Sri Lanka Ass. Advmt. Sci. 49(1). 
  11. Basnayake, J.C.K., K.P.U. de Silva and S.D.G. Jayawardana. 1985. Relative varietal resistance of Sweetpotato hybrid lines to Sweetpotato weevil. Proc. Sri Lanka Ass. Advmt. Sci. 41(1). 
  12. De Silva, K.P.U., G.A.M.B. Gunaratne, R. Gunatunga and S.D.G. Jayawardana. 1985. An evaluation of some methods of storing Innala. Proc. Sri Lanka Ass. Advmt. Sci. 42(1). 
  13. De Silva, K.P.U., S.D.G. Jayawardena, C.R. de vas and J.C.K.Basnayake. 1985.potential for crop improvement in Cassava by selection of naturally cross pollinated seedlings. Proc. Sri Lanka Ass. Advmt. Sci. 41(1).
  14. De Silva.K.P.U., J.C.K.Basnayake, R.gunathunga, and S.D.G.Jayawardena. 1986. Process in breeding Cassava and Sweetpotato in Sri lanka. Annual res. Conf.on fruits, vegetables, root and tuber crops. Department of Agriculture, Preadeniya, sri Lanka. 
  15. De Silva.K.P.U., J.C.K.Basnayake, R.Gunathunga and S.D.G. Jayawardena. 1986. Efficency of resource utilization in cassava-vegetablrs intercropping systems under different spatial arrangement. Annual res. Conf.on fruits, vegetables, root and tuber crops. Department of Agriculture, Preadeniya, Sri Lanka. 
  16. De Silva.K.P.U.,R.Gunathunga, G.A.M.D. gunarathne and S.D.G. Jayawardena. 1986. Charaterization and evaluation of cultivated and wild cocoyam cultivas in Sri Lanka. Annual res. Conf.on fruits, vegetables, root and tuber crops. Department of Agriculture, Preadeniya, Sri Lanka. 
  17. Dissanayaka.L.D., K.P.U.de Silva and K.D.S.M.Joseph. 1986. Some thoughts, some attemps and some findings on problems of small mid-country farmers using farming systems research/extension approach and methodology. Seminary work shop on farming systems research and extension in Sri Lanka, Ahungalla, Sri Lanka. 
  18. Jayawrdena.S.D.G.and K.P.U.de Silva. 1987. Indigenous and recent advances in Sweetpotato production,processing utilization and marketing in Sri Lanka. Seminar- work shop on sweetpotatoes for small farmers and Asian perspective, held at VISCA,Baybay, Leyte, Philippines. 
  19. Jayawardana, S.D.G. and K.P.U. de Silva. 1987. Cassava varietal improvement and agronomy research in Sri Lanka. Workshop on Cassava breeding and agronomy research in Asia and future Network Corporation. Bangkok, Thailand. 
  20. De Silva, K.P.U. and J.C.K. Basnayake. 1987. The polycross as an applied breeding procedure for Sweetpotato improvement in Sri Lanka. Proc. Sri Lanka Ass. Advmt. Sci. 43(1). 
  21. De Silva, K.P.U. 1987. Genotype variation in local germplasm collection of Cocoyam (Zanthosama and Colocasia) in Sri Lanka. Proc. Sri Lanka Ass. Advmt. Sci. 43(1). 
  22. Basnayake, J.C.K., K.P.U. de Silva and S.D.G. Jayawardana. 1987. Study on plant type, collected vine growth and N- fertilizer on yield of Sweetpotato. Proc. Sri Lanka Ass. Advmt. Sci. 43(1). 
  23. De Silva, K.P.U. 1988. Weli-ala, a promising Colocasia genotype. Proc. Sri Lanka Ass. Advmt. Sci. 44 (1). 
  24. Prematrilake, P.S.A.D., K.P.U. de Silva, R. Gunatunge and S.D.G. Jayawardana. 1988. Feasibility of growing vegetable with Sweetpotato. Proc. Sri Lanka Ass. Advmt. Sci. 44(1). 
  25. De Silava, K.P.U., J.C.K. Basnayake, P.S.A.D. Prematilake and S.D.G. Jayawardana. 1988. Performance of promising Sweetpotato line, CARI-426 developed through poly-cross breeding. Proc. Sri Lanka Ass. Advmt. Sci. 44(1). 
  26. Jayawardana, S.D.G., W.M.S. Bandara and K.P.U. de Silva. 1988. Root and Tuber Crops in the context of food and nutritional policy of Sri Lanka. Paper presented at the 8th symposium of the International Society for Tropical Root Crops held in Bangkok, Thailand. 
  27. De Silva, K.P.U., R. Gunatunge, J.C.K. Basnayake and S.D.G. Jayawardana. 1988. BT.15-1 a new Salad type of tomato line. Proc. Sri Lanka Ass. Advmt. Sci. 44(1). 
  28. De Silva, K.P.U. 1991. Breeding activities at CARI on Sweetpotato. SAPPRAD News letter Vol.V: 1
  29. De Silva, K.P.U. 1991. Breeding activities at CARI on Sweetpotato.  SAPPRAD Newsletter Vol. V. No. 1 
  30. De Silva, K.P.U. 1991. Project Leaders Report on Sweetpotato. 10th Annual SAPRAD meeting, Held at Chaing Mai, Thailand, 6-7th September, 1991.
  31. De Silva, K.P.U. 1992. New promising Sweetpotato variety in Sri Lanka. SAPPRAD Newsletter Vol. VI No. 1.
  32. De Silva, K.P.U. 1992. Project Leader's report on Sweetpotato, 11th Annual SAPPRAD meeting, Held at Naga City Philippines, 2-5th September 1992.
  33. De Silva, K.P.U. 1993. Project Leader's report on Sweet potato, 12th Annual SAPPRAD meeting, Held at Aiyura, Papua New Guinea, 1-4th September, 1993.
  34. De Silva, K.P.U. 1994. Project Leader's Report on Sweetpotato, 13th Annual SAPPRAD meeting, Held at Kuantan, Malayasia, 5-9t September, 1994.
  35. De Silva, K.P.U., H.D. Jayawickrama  and A. Premathilake. 1994. Screening of Sweetpotato genotypes under different rice-fallow environments. Selected Research Papers - 1993/94, Vol.2 : Sweetpotato, SAPPRAD, Philippines.
  36. De Silva, K.P.U., H.D. Jayawickrama  and A. Premathilake. 1994. Cultural control of Sweetpotato weevil. Selected Research Papers - 1993/94, Vo.2 : Sweetpotato, Editors : E.T. Rasco and V.D.R. A,amte, SAPPRAD, Philippines.
  37. De Silva, K.P.U., H.D. Jayawickrama , A. Premathilake and K. Setunga. 1994. Pattern of physiological deterioration due to recycling of Sweetpotato vines. Selected Research papers - 1993/94, Vol.2 : Sweetpotato, Editors: E.T. Rasco and V.D.R. Amante, SAPPRAD, Philippines.
  38. Rasco E.T. J.R., J. Bacusmo, De Silva K.P.U,  A.Dimyati, Z. Ganga  and N. Poolperm. 1994. Scheme for Agroecology - and use - specific variety Development for Sweetpotato. Vol.1 : Training Manual, Editors: Rasco, E.T. and V.D.R. Amante, SAPPRAD, Philippines.
  39. De Silva, K.P.U., H.D. Jayawickrama  and A. Premathilake. 1995. Comparison of cultivation methods of Sweetpotato in rice-fallow lands. selected Research papers - 1994/95. Vol.2 : Sweetpotato SAPPRAD, Philippines.
  40. De Silva, K.P.U.  1995. Project Leader's Report on Sweetpotato 14th Annual SPPARD meeting, Held at Kandy, Sri Lanka, 2-5th September,1995.
  41. De Silva, K.P.U., H.D.  Jayawickrama, and A. Premathilake. 1995. Screening of Sweetpotato genotypes in rice-fallow environments: of users' in variety development of Sweetpotato. Selected Research Paper - 1994/95, Vol.2 : Sweetpotato, SAPPRAD, Philippines.
  42. Premathilake, A. and K.P.U. de Silva. 1995. Pattern of physiological deterioration upon recycling of Sweetpotato vines : effect of variety. Selected Research Papers - 1994/95, Vol.2 : Sweetpotato, SAPPRAD. Philippines.
  43. Ekenayake, R.H.M.K., H.D. Jayawickrama and K.P.U. de Silva. 1995. Cultural control of Sweetpotato weevil (C. formicarius) . Selected Research Papers - 1994/95, Vol.2 : Sweetpotato, SAPPARD, Philippines.
  44. De Silva, K.P.U. and H.D. Jayawickrama.  1996. Selected of true-to-type variety Wriyapola-red. Selected Research Papers 1995/96, Vol.2 : Sweetpotato, SAPPRAD, Philippines.
  45. De Silva, K.P.U. and A. Premathilake 1996. Effect of variety and number of generations of vegetative propagation on vegetative and yield traits of Sweetpotato. Selected Research papers - 1995/96, Vol.2 : Sweetpotato, SAPPRAD, Philippines.
  46. De Silva, K.P.U., H.D. Jayawickrama and A. Premathilake. 1996. Evaluation of user-selected Sweetpotato clones in rice-fallow environments, Selected Research papers - 1995/96, Vol.2 : Sweetpotato, SAPPRAD, Philippines.
  47. Samarajeewa, P.K., S. Abeythunga and De Silva K.P.U. 1996. The present status and future prospects of plant genetic resources of conservation and utilization. Proceedings of an international seminar held in Kandy, Sri Lanka, 9-12th December, 1996.
  48. De Silva, K.P.U. and S.D.G. Jayawardena. 1996. Recent advances in research and Development activities of Sweetpotato in rice based environments in Sri Lanka. IMOTUC 1996, Tuber Crops in Food Security and Nutrition. 9-12th December 1996. Trivandrum kerala, India.1999
  49. De Silva, K.P.U. 1999. importance of our biodiversity in developing new ornamental plants. Seminar on pest and Diseases in Floriculture, organized on Sri Lanka floriculture produce association/AgEnt, held in Colombo 11th March 1999.
  50. Harischandra, S.N. and K.P.U. De Silva. 2000. Conservation and use of genetic resources of tropical Root & Tuber Crops in Sri Lanka I.P.G.R workshop, held at PGRC Gannoruwa 8 - 9th November 2000.
  51. De Silva, K.P.U. and S.B. Etampawala. 2001. Participatory research activity with farmers. (To be published in CARP-Agricultural Research News Vol.2, Issue 1, Aprial-June-2001).
  52. De Silva, K.P.U. 2001. Techno-guide for cultivation of selected Horticultural Crops under atoll environment in Maldives. Prepared as the National Consultant Agronomist of the special programme for food security project [TCP/MDV/0065(5)]- Ministry of fish. Ag. and Marine RSC, The Republic of Maldives/FAO, September,2001.


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