Black Spot or Black Spot of Rose is a disease common to roses, caused by the fungusDiplocarpon rosae. The name of the disease comes from its effect on the plant; it causes black spots to appear on leaves, which eventually yellow and die. The black spots are circular with a perforated edge, and reach a diameter of 14mm. Badly affected plants, however, will not show the circular pattening, as they combine to cause a large black mass. The common treatment of the disease, is to remove the affected leaves, and spraying with anti-fungal solutions. Some stems of the roses may become affected if untreated, and will cause progressive weakening of the plant. It is usually recommended to remove the plant, as it will not yield well, and will slow the spreading of the disease. Species About 100, see text A rose is a flowering shrub of the genus Rosa and the flower of this shrub. ... Divisions Chytridiomycota Deuteromycota Zygomycota Glomeromycota Ascomycota Basidiomycota Fungus growing on a tree in Borneo A fungus (plural fungi) is a eukaryotic organism that digests its food externally and absorbs the nutrient molecules into its cells. ... A disease is any abnormal condition of the body or mind that causes discomfort, dysfunction, or distress to the person affected or those in contact with the person. ... Divisions Land plants (embryophytes) Non-vascular plants (bryophytes) Marchantiophyta - liverworts Anthocerotophyta - hornworts Bryophyta - mosses Vascular plants (tracheophytes) Lycopodiophyta - clubmosses Equisetophyta - horsetails Pteridophyta - true ferns Psilotophyta - whisk ferns Ophioglossophyta - adderstongues Seed plants (spermatophytes) †Pteridospermatophyta - seed ferns Pinophyta - conifers Cycadophyta - cycads Ginkgophyta - ginkgo Gnetophyta - gnetae Magnoliophyta - flowering plants Adiantum pedatum (a fern... Leaves are an Icelandic five-piece alternative rock band who came to prominence in 2002 with their debut album, Breathe, drawing comparisons to groups such as Coldplay and Doves. ... In common parlance, a stem is any elongated, usually narrow, extension or supporting structure of an object. ...
Rose flspot, caused by the fungus Diplocarpon rosae, is the most common cause of defoliation of landscape roses in Eastern United States.
Blackspot can be distinguished from other leaf spot diseases of rose by the generally fringed margins and the darker and consistently fl color of the leaf spots.
Most roses get flspot to some degree, but roses that have been bred for resistance to this and another common disease of roses, powdery mildew, will require less maintenance than those that are known to be susceptible to these diseases.
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