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  2. Leaf spot - Wikipedia

    en.wikipedia.org/wiki/Leaf_spot

    Leaf spots are visible symptoms of virus infections on plants, and are referred to as systemic symptoms. [7] In systematic virus infections leaf spots caused by viruses show a loss of green colour in leaves, due to chlorosis which is a repression of chlorophyll development. [1]

  3. Mycosphaerella henningsii - Wikipedia

    en.wikipedia.org/wiki/Mycosphaerella_henningsii

    The centre of the brown spots may fall out leaving a hole in the leaf. During a bad attack the infected leaves become yellow and dry, and may die early. The disease can greatly reduce yields. [1] The fungus lives in diseased cassava leaves on the plant or those on the ground. It spreads to new leaves and plants by wind or rain splash. [1]

  4. Cricula trifenestrata - Wikipedia

    en.wikipedia.org/wiki/Cricula_trifenestrata

    Male is brown, ochreous, yellowish to reddish. Forewings are consisted with a waved anti-medial dark line and a small hyaline spot beyond the end of the cell, with one or two others above it. The upper one is a dark spot. Hindwings with oblique line continued to the inner margin before the middle. There is a hyaline spot beyond the cell.

  5. 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 ...

  6. Shot hole disease - Wikipedia

    en.wikipedia.org/wiki/Shot_hole_disease

    Peach tree leaves displaying various stages of the shot hole disease: brown spots on the leaf with conidium holders in the middle (center) that eventually fall off, leaving BB-sized holes behind (left) Shot hole disease of apricot leaves. The fungal pathogen Wilsonomyces carpophilus affects members of the Prunus genera. Almond, apricot ...

  7. Peyronellaea curtisii - Wikipedia

    en.wikipedia.org/wiki/Peyronellaea_curtisii

    Peyronellaea curtisii causes red-brown spots on leaf tips of Narcissus [6] and other members of the family Amaryllidaceae; this gives them a scorched appearance that is easily mistaken for frost damage. A yellowish discolouration then spreads down the leaf; more spots may develop as the leaf withers, turns brown and die away.

  8. Mycosphaerella coffeicola - Wikipedia

    en.wikipedia.org/wiki/Mycosphaerella_coffeicola

    On leaves, lesions begin as chlorotic (yellow) spots that expand to become deep brown and necrotic on the upper leaf surface. [3] These spots often have a discolored, light center where sporulation can occur, and many have a yellow "halo" around the margins. This halo is caused by the toxin cercosporin, produced by Cercospora species. [1]

  9. Rhytisma acerinum - Wikipedia

    en.wikipedia.org/wiki/Rhytisma_acerinum

    Once on the leaves, the spores germinate and penetrate through the stoma. [2] The subsequent infection causes chlorosis of the leaves in localized yellow spots. As the season continues into summer, apothecia begin to form, giving rise to brown-black leaf lesions that resemble spots of tar. [2] Leaves retain their yellow border from the initial ...