author(s)
Soniya Dhanda, Surender Singh Yadav, Sunita Yadav and Sonu Kumari

abstract
An experiment was conducted to study the population dynamics of insect-pest infesting tomato on entomology research farm, Chaudhary Charan Singh Harayana Agricultural University (CCSHAU), Hisar during crop season Rabi 2018-19. It was found that tomato was attacked by tomato fruit borer (Helicoverpa armigera), aphid (Myzus persicae), and leaf miner (Liriomyza trifolii). H. armigera incidence reaching its peak population (5.05 larvae/ plant) in 17^th SMW (4^th week of April) and aphid attained highest population of 23.26 aphids per three leaves during12^th SMW (fourth week of March). While peak population of whitefly was (6.28 whitefly adults per three leaves) reported during third week of April (16^th SMW). Appearance of leaf miner was observed during first week of March (9^th SMW) with 0.63 mines/ 3 leaves and maximum population (5.95 mines/ 3 leaves) was recorded during 15th (SMW) viz. second week of April. However correlation study with abiotic factors also carried out during experiment.