Download this publication. Louisiana's warm, humid weather encourages the development of several serious diseases that can damage rose bushes. This publication describes the major rose diseases found in Louisiana and offers disease management tips. (PDF Format Only)
Black Spot vs. Cercospora Leaf Spot on Roses – UF/IFAS The Neighborhood Gardener August 2010
How to tell the difference between black spot and Cercospora leaf spot on roses, in the August issue of The Neighborhood Gardener
Blackspot on Rose Leaves
Blackspot, Diplocarpon rosae, is a nasty fungus that manifests itself on rose bushes as black spots on leaves progressing to black spots fringed with yellow rings on both sides of the leaves...