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Tar spot is a localized disease that causes mostly cosmetic symptoms and is therefore not a highly controlled disease. [3] One of the best ways to manage the pathogen is through proper sanitation techniques. [3] Because the fungus overwinters in diseased leaf debris, removing the debris in fall can help reduce the occurrence of the disease. [3]
Cristulariella depraedans, commonly known as gray mold spot, sycamore leaf spot or bull's eye spot, is a fungal pathogen that affects maple trees (genus Acer) and certain other woody and herbaceous species. In maples, the foliage becomes affected by small grey lesions which expand and coalesce, the leaves later wilting and falling from the tree ...
Phyllosticta minima is a fungus of the division Ascomycota which causes purple-bordered leaf spot, a largely cosmetic disease that infects maple trees. [1] It grows on living and fallen leaves, creating tan, ovular lesions 1 ⁄ 4 inch in diameter and ringed with 'purple' or black spores.
Rhytisma punctatum is a species of fungus in the family Rhytismataceae.The fungus causes speckled tar spot of maple leaves. The small spots are black, raised from the leaf surface, and occur in dense groups on the upper surface.
Knowing the disease cycle of each microbial agent also helps in managing leaf spot disease. [2] Fungal leaf spot pathogens follow the path of attaching to the plant surface, germinating via spores and entering into the host tissue. Colonisation of the host tissue follows and then the expression of symptoms. [14]
Bacterial leaf scorch (commonly abbreviated BLS, also called bacterial leaf spot) is a disease state affecting many crops, caused mainly by the xylem-plugging bacterium Xylella fastidiosa. [1] It can be mistaken for ordinary leaf scorch caused by cultural practices such as over-fertilization.
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Sycamore leaf spot, caused by the fungus Cristulariella depraedans, results in pale blotches on leaves which later dry up and fall. This disease can cause moderate leaf loss but trees are little affected in the long run. [46] Fungal species Coniothyrium ferrarisianum has also been isolated from leaves of Acer pseudoplatanus in Italy in 1958. [54]