Department of Horticulture, Punjab Agricultural University, Ludhiana 141 004
Investigations carried out on five-year old ‘Perlette’ vines showed that foliar sprays of ZnSO4 (0.2, 0.4, 0.6%), FeSO4 (0.1, 0.2%) and boric-acid (0.05%) once at full-bloom and again after fruit set stage improved yield and quality considerably. ZnSO4, (0.4%) was found to be most effective in increasing yield, bunch weight and berry weight, while FeSO4 (0.2%) significantly improved juice quality in term of total soluble solids.
