Assessment of crop losses due to tomato fruit borer, Helicoverpa armigera in tomato

Abstract

Present study was undertaken to estimate yield losses due to tomato fruit borer in tomato crop at farm of Agricultural Research station, Swami Keshwanand Rajasthan Agricultural University, Bikaner, during the rabi season, 2013-14. In unprotected plots, the average height of plants, number of leaves and average weight of fruits per plant recorded were 43.78 cm, 50.13 and 45.69 gm, respectively. While these values in protected plots being 59.88 cm, 61.10 and 54.32 gm, respectively. On the basis of difference obtained in net yield in protected and unprotected plots the avoidable quantitative loss was 31.53 per cent on winter sown tomato crop.