How to Treat Black Spot on Roses?
To treat black spot on roses, you can use certain fungicides. Because black spots may be caused by a fungal disease, fungicides, such as Neem oil and Ziram are a good way to stop the spread of the disease. In addition, cutting infected leaves off may also help to slow down this fungal disease. You can find more information at http://pmo.umext.maine.edu/factsht/spotr…