Population dynamics of fruit borer, Helicoverpa armigera and whitefly, Bemisia tabaci on tomato
Pooran Mal Kharia, Rajesh Kumar, Mukesh Kumar Jat and Gaurang Chhangani
The investigation was carried out during rabi season of 2014-15in a farmer’s field of an extensive tomato growing village Surajgarh, block Matanhail, District Jhajjar, Haryana. For fruit borer and whitefly population of tomato, a block of 20×20 m2 area was transplanted on 25.12.2014 by following the recommended agronomical practices. A distance of 60 cm from row to row and 45 cm plant to plant was maintained at the time of transplanting. The population of fruit borer, Helicoverpa armigera and whitefly, Bemisia tabaci were recorded starting from the 4th standard week at crop establishment stage and till 18th standard week at the crop maturity stage. The first appearance of the fruit borer was noticed during 11th standard week (12th -18th March) and it reached maximum in 16th standard week (16th -22nd April), while the population decreased up to crop maturity. A negligible population of whitefly was first observed during 16th standard week which remained below ETL ranging from 0.1 to 0.2 adults per plant till crop maturity (18th standard week).
The fruit borer population had a significant positive correlation with maximum temperature, minimum temperature and bright sunshine while significant negative correlation with morning and evening relative humidity. Similarly, whitefly population had a significant positive correlation with temperature, while significant negative correlation with relative humidity although the population was far below ETL.
Pooran Mal Kharia, Rajesh Kumar, Mukesh Kumar Jat, Gaurang Chhangani. Population dynamics of fruit borer, Helicoverpa armigera and whitefly, Bemisia tabaci on tomato. J Entomol Zool Stud 2018;6(6):396-399.