Effect of Different Concentration of 4-Chlorophenoxyacetic Acid on Fruit set of Summer Tomato

Abstract

Effect of 4-chlorophenoxyacetic acid (4-CPA), an artificial plant growth regulator, was studied on fruit-set of summer hybrid tomato line, BARI hybrid tomato-4, at the Horticulture Research Center (HRC), Regional Agricultural Research Station (RARS), Bangladesh Agricultural Research Institute (BARI), Jessore, during April to October 2008. Five concentrations of 4-CPA viz., 10, 20, 30, 40 and 50 ppm were tested against BARI hybrid tomato-4. Flowers treated with 20 ppm were found suitable to enhance maximum fruit-set. This concentration was applied to evaluate the performance of the hybrid lines FPs × MPs, WPs × C-11, WPs × C-11, WPs × C-5 and BARI hybrid tomato-4 as check. Individual fruit weight, fruit per plant, as well as yield of hybrid line WPs × C-11 were found superior as compared to the check while fruit weight and yield were the lowest in hybrid line FPs × MPs. Early harvest following minimum days to flowering was recorded in BARI-hybrid tomato-4 and FPs × MPs. All the varieties responded positively when flowers treated with 20 ppm 4-CPA at the anthesis.