• Entomology
• Weed management
• Organic farming
• Plant physiology

• Basic Biology
• General Microbiology
• Productive entomology
• Bioagent production technology
• Plant protection technology

Book

1. Varnika, K., Pakeerathan, K. and Mikunthan, G.: "Eco-friendly Management of Parthenium hysterophorous ", L.  LAP: LAMBERT Academic Publishing, (69). ISBN: 978- 620-2-67314-3 

Conference Proceeding

1. Pushpakalaa M, Herath. P.G.H.M.S.N, Jeyavanan.K , Varnika. K, Jathukula.R , Kujinsiga.J.
   Bio Efficacy Evaluation of different Non-Hazardous Alternative Chemicals and Commercial
   Fungicides for Controlling Groundnut Stem Rot Incidence by against Sclerotium rolfsii.S.1 st Annual Research Session-2022, Faculty of Technology, Eastern University of Sri Lanka,6 th
   October 2022, ISBN: 978-624-5731-13-8.
2. Madhusha, G, Varnika, K, Jeyavannan, K, Mayakaduwa, M, A, P. Effect of Different Fruit Peels-Based Nutrition Sources on The Growth and Yield of Lettuce. 1 st Annual Research Session-2022, Faculty of Technology, Eastern University of Sri Lanka,6 th October 2022, ISBN:
   978-624-5731-13-8.
3. Vidvanee, S, Varnika, K, Jeyavannan, K, Prabath Nishantha K, M, D, W. Study of Parasitic Arthropoda Fauna of Aphids Associated with Vegetables Growing Areas of The Central
   Province Sri Lanka. 1 st Conference on Technological Advancements and innovations (TechInn-
   2022)- Faculty of Technology, University of Jaffna, ISBN: 978-624-6150-12-9.
4. Varnika, K. Pakeerathan, K, Thanusha, S. and Mikunthan, G. Potential of selected bio-rationals and locally available materials for the eco-friendly management of Parthenium hysterophorus, International Conference on Agriculture and Food Security, Sri Lanka, August, 2019, pp 06.

1. Late Mrs. Puvaneswary Loganathan Memorial Gold Medal for obtaining Highest OGPA in the award of Degree of Bachelor of Science in Agriculture, 2019.
2. Ratnam Reginold Dharmaratnam Memorial Prize for obtaining Highest OGPA in the award of Degree of Bachelor of Science in Agriculture, 2019.
3. Late Dr. & Mrs. C. Jeyaratnam Memorial Gold Medal for obtaining Highest OGPA among the students specialized in Agricultural Biology, 2019.
4. Dean Merit certificate for Best Research in Agricultural Biology in the year 2019 for Fourth Examination in Agriculture.

• Lecturer (Temporary) at the Department of Agricultural Biology, Faculty of Agriculture, University of Jaffna, Sri Lanka (21st November 2019 to 29th July 2021).
• Demonstrator at the Department of Agricultural Biology, Faculty of Agriculture, University of Jaffna, Sri Lanka(22nd May 2019 to 20th November 2019).