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  2. Black spot leaf disease - Wikipedia

    en.wikipedia.org/wiki/Black_spot_leaf_disease

    Treating black leaf disease can be achieved in many ways. Some include removing each affected leaf of any yellow or black color. If the infection has spread throughout a larger area, it may be best to remove the affected limb of the plant to reduce further spread. Fungicides may be used as treatment. There are a number of remedies used to ...

  3. Rhytisma acerinum - Wikipedia

    en.wikipedia.org/wiki/Rhytisma_acerinum

    The infection of Tar Spot is localized to the chlorotic areas on the leaves and is mostly a cosmetic issue, rather than an economically detrimental disease. [5] The anamorph of tar spot is Melasmia acerina. [5] In late summer, conidiophores are formed in the mass of fungal tissue called the stroma. Stroma is located in the black lesions of the ...

  4. Diplocarpon rosae - Wikipedia

    en.wikipedia.org/wiki/Diplocarpon_rosae

    The black spots are circular with a perforated edge, and reach a diameter of 14 mm (1 ⁄ 2 inch). Badly affected plants, however, will not show the circular patterning, as they combine to cause a large, black mass. The common treatment of the disease is to remove the affected leaves and spray with antifungal solutions.

  5. List of pests and diseases of roses - Wikipedia

    en.wikipedia.org/wiki/List_of_pests_and_diseases...

    Black spot (class Leotiomycetes: family Helotiales) Diplocarpon rosae syn. Marssonina rosae – Marssonina rosae causes black spots on leaves. [4] The spots, which may be as much as 12 mm across, are generally circular and have an irregular edge often with a yellow halo. Leaves frequently turn yellow and fall early. Sometimes new leaves are ...

  6. Leaf spot - Wikipedia

    en.wikipedia.org/wiki/Leaf_spot

    Leaf spots can vary in size, shape, and color depending on the age and type of the cause or pathogen. Plants, shrubs and trees are weakened by the spots on the leaves as they reduce available foliar space for photosynthesis. Other forms of leaf spot diseases include leaf rust, downy mildew and blights. [4]

  7. Stegophora ulmea - Wikipedia

    en.wikipedia.org/wiki/Stegophora_ulmea

    The black spots can become about 5 millimeters in diameter. [1] As the season continues, the tissue around the original spot may become necrotic. [4] In severe cases of the disease there is premature shedding of leaves, blight of young leaves and shoots, and complete defoliation early in the fall. [1] Fruits that are infected become crumpled. [1]

  8. 7 Causes for Brown Spots on a Fiddle Leaf Fig (and How to ...

    www.aol.com/7-causes-brown-spots-fiddle...

    5. Low Humidity. Light brown spots scattered across fiddle leaf fig leaves can be caused by dry air. If the brown spots in question have a pox-like look instead of being in a single area of the ...

  9. Colletotrichum lindemuthianum - Wikipedia

    en.wikipedia.org/wiki/Colletotrichum_lindemuthianum

    Colletotrichum lindemuthianum is a fungus which causes anthracnose, or black spot disease, of the common bean plant (Phaseolus vulgaris).It is considered a hemibiotrophic pathogen because it spends part of its infection cycle as a biotroph, living off of the host but not harming it, and the other part as a necrotroph, killing and obtaining nutrients from the host tissues.