The first cultural control method is to choose the right grape cultivar for the region that the grape will be grown in. Grape cultivars differ in their susceptibility to diseases, including differences in the disease black rot. Some varieties are less susceptible, while others are more prone to the disease when the right environmental conditions occur. Through research, many lists of grapes varieties will show the amount of resistance a variety has to disease and how the variety should be grown. A list of grape varieties is a good place to start for selecting the right grape variety.