List of Publications:

1. Gunawardena, J (nee De Zoysa I. J)  Udugama, S. and Seneviratne S.N. de S. (1980) New hosts of Pseudomonas solanaceanum in Sri Lanka.  Proceedings of 36^th Annual Session of the Sri Lanka Association for the Advancement of Science, part 1:34.
2. Gunawardena K.I.J (nee De Zoysa I. J). 1983. Epidemiology of bacterial canter of plum (Prumus domestica) caused by Pseudomonas syringae pv. morsprunorum. Ph.D thesis University of London, Imperial College, UK. pp 101
3. De Zoysa, I. J. 1986. Bud blight of soya bean, Krushi, 8:6-8.
4. De Zoysa, I. J., 1987. Diseases of legumes in Sri Lanka Proceedings improved production and utilization of food legumes in Sri Lanka : 156 – 164.
5. De Zoysa I. J., 1987. Narrow leaf disorder of Chilli Tropical Agriculturist, 143: 87.
6. De Zoysa, I. J., W.D. Athukorale and L.C. Wijetilaka. 1990. Die-back of Gliricidia sepium Tropical Agriculturist 146: 123.
7. De Zoysa, I. J.1992. Bacterial Wilt of Tomato and capsicum in Sri Lana.  Proceedings of SA VERNET joint planning meetidng, Dhaka, Bangladesh.
8. De Zoysa, I. J.,and H.T.K. Liyanage. 1994.  Bacterial wilt of Centrella asiatica in Sri Lanka.  Bacterial wilt newsletter 10:5.
9. Senanayake D.M.J.B., I.J. de Zoysa and R.M.T. Rajapaksa. 1994. Pathogenic variation of Pyricularia oryzae the causal organism of rice blast disease in proceedings of Plant genetic resources and Crop improvement, PGRC, Peradeniya, Sri Lanka. P. 41-47.
10. De Zoysa, I. J., H.T.K. Liyanage and V. Vigananakulasingham. 1995. Characterization of papaya viruses in Sri Lanka.  Proceedings of 51^st Annual session of SLAAS. Part 1:94-96.
11. De Zoysa, I. J., E.P.K. Malkanthi and R.  Pathirana. 1996. Identification of Mukunuwenna (Alternanthera sessilis) germplasm resistant to white rust and red leaf spot diseases. Proceedings of 52^nd annual session of SLAAS. Part 1:71-72.
12. De Zoysa, I. J. 1997. Bacterial wilt of tomato in Sri Lanka. Proceeding of SAVERNET phase 1 workshop held in Kathmandu, Nepal in 1996. AVRDC publication No. 97:187-195.
13. De Zoysa, I.J. 1997. Leaf curl virus of tomato in Sri Lanka. Proceedings of the South Asian Vegetable Research Network (SAVERNET), Phase 1.  workshop held in Kathmandu, Nepal in 1996. AVRDC publication No. 97: 265-269.
14. De Zoysa, I.J. and D.M.N.Dissanayake. 1997. Present status & future trends in plant pathology research in the Dept. of Agriculture. Proceedings of a National Seminar on Agricultural Research: Past, Present & Future. Resource Centre, Gannoruwa.
15. De. Zoysa, I.J. 1997. Citrus diseases in Sri Lanka. In Decline of Citrus Cultivation in Sri Lanka. Report on task force on fruits – Ministry of Agriculture, Sri Lanka: 16-22.
16. De Zoysa I.J (1998) Bacterial wilt of tomato & brinjal – screening of local & Exotic germplasm. Proceedings of SAVERNET joint planning meeting Kandy, Sri Lanka.
17. Kudagamage C, I. J. De Zoysa and H.M.R.K. Ekanayake. 1998. Pests and diseases of ornamental plants. Horticultural Crop Research & Development Institute, Peradeniya, Sri Lanka 49 pp.
18. De Zoysa I. J. 2001. Control of plant diseases-Problems & prospects, Proceedings of seminar on pest control in the next millennium. SLAAS section B and University of Ruhuna: 21 - 26
19. Sapumohotti WP, I. J. De Zoysa and A.G.C. Perera.  1999. Identification of Fusarium oxysporum f.sp. cubense on the basis of vegetative compatibility.   Proceeding of the 55^th annual session of the Sri Lanka association for the advancement of science, part 1:63
20. Ilankoon J, I. J. De Zoysa and A. Wijesekara. 2001. Tomato grafting as a remedy for bacterial wilt in a protected agriculture system Annals of the Sri Lanka Dept. of Agriculture 3:53-60.
21. De Zoysa, I.J. D.B. Kelaniyangoda and K.P. Somachandra. 2001. Bacterial wilt resistance in Tomato and Brinjal. A paper presented at the final workshop on South Asian Vegetable Research Network (SAVERNET), Phase II. Bangkok, Thailand. 7-17.
22. Kudagamage C, I.J. De Zoysa, PW.K.I. riyadarshani.  2003. Identification and management of pests and diseases of low country vegetables Horticultural Crop Research & Development Institute, Peradeniya, Sri Lanka, 127 pp. (in Sinhala)
23. De Zoysa, I.J. 2003. Plant Protection research in horticultural crops. Proceedings of a workshop on present status and future trends in plant protection research in the national agricultural research system. 28^th Nov. 2003 Council for agricultural research policy publication, Colombo, Sri Lanka. : 44 – 55
24. Wahundeniya. I. and I.J.De Zoysa.2004. The cause of leaf scorching and death of mango seedlings. A preliminary investigation. Annals of the Sri Lanka, Dept. of Agriculture 6:309-313.