This disease can be confused with other problems, such as insect infestations or environmentally related causes. Make sure Verticillium wilt is positively identified by an appropriate plant disease clinic before following control measures. To control the disease, remove and destroy infected plants. Because the fungus responsible for the disease survives in the soil, do not plant roses in contaminated soil for three years or longer. Disease Controls Simple maintenance or cultural practices can prevent most rose diseases.
Fungicides are necessary only in severe cases.
Buy and plant disease-free plants. Choose resistant varieties. Varieties are available with resistance to powdery mildew, black spot and many other diseases. See Table 1. Avoid wounding plants during transplanting.