All species of roses (Hulthemia, Hesperrhodos, Platyrhodon and Rosa) are affected by black spot disease. The disease is found everywhere roses are planted, typically in epidemic proportions. The water-borne dispersal methods allow it to infect a plethora of plants every growing season and increase the overall incidence of disease.
All rose species (Hulthemia, Hesperrhodos, Platyrhodon, and Rosa) suffer from black spot disease. This condition is widespread wherever roses are planted, typically in significant quantities. The water-borne spread mechanisms enable it to infect a variety of plants each growing season and elevate the overall incidence of illness.