New Generation Growth Regulators—Brassinosteroids and CPPU Improve Bunch and Berry Characteristics in ‘Tas-A-Ganesh’ Grape

Abstract

The effects of brassinosteroid and N-(2-chloro-4-pyridyl)-N′-phenylurea either alone or in combination with benzyladenine on bunch parameters viz. bunch weight, berry weight, berry volume, and number of berries per bunch were evaluated on seedless grape variety 'Tas-A-Ganesh' (a clone of 'Thompson Seedless'). The growth regulator treatments were applied by dipping the bunches at either 7 or 15, or both 7 and 15 days after fruit set. The results showed that two dips, i.e., (7th + 15th) days after fruit set were more effective than single dips. The treatments having a combination of either higher or lower concentration of both BR (0.4 ppm) and CPPU (4 ppm) along with brassinosteroid 20 ppm produced maximum bunch weight (371.13 g), berry weight (4.90 g), berry volume (4.22), and number of berries per bunch (90.88).