Grape Bitter-rot was one of the most important diseases in grape production.The correlation of soilds content and disease incidence of the grape bitter-rot were studied.The results showed that grape fruit soluble sugar content was positively correlated and organic acid and tannin content was negatively correlated with the disease incidence of the grape bitter-rot in different developmental stages respectively.Different methods of inoculation resulted in differences in the incidence of grape bitter-rot.The i...