Effects of different prunning and pregermination time on floral of fruiting cane in winter grape

[Objective]To seek for the winter grape pregermination period. [Method]Three vineyard in different locations were pruned and investigated for the pre-germination duration at 5 day intervals from 5 to 20 August, every five days for a treatment and statistical analysis was done for winter grapes flowers at different pregermination time. [Result]The results showed that, for pregermination periods on 5,10,15 and 20 August, floral branches rate were 59.15%,61.4%,83.59% and 58.97% respectively, floral spike rate were 88.39%,86.26%,127.66% and 96.94% respectively, and the supreme was on 15 August. [Conclusion]Buding at about 15 August is beneficial for winter grape into flower in Kyoho grape.