Effects of calcium cyanamide and alzodef on bud breack and yield of 'Niagara Rosada' grape

Abstract

In an experiment carried out in Jundiaí, São Paulo State, it was studied the possibility of termination of rest in plant buds by treatment with chemicals. The control of bud sprouting in the vineyard is important to pre vent chilling effects and to increase grape harvesting period. At October, 28, two hours after pruning, 'Niagara Rosada' plants were treated with calcium cyanamide at 20% applied on buds and on cuted region of pruned twig, sprayed with Alzodef 2% and 5%. It was observed that Alzodef 2% terminated bud rest more rapidly in relation to the control plants. Application of calcium cyanamide 20% on buds or on cuted region, and spraying with Alzodef 2% or 5% promoted good results on terminate bud rest of 'Niagara Rosada' plants. The chemiacals did not affect significantly the quantity of bunches and the yield per plant.