anthracnose
Colletotrichum orbiculare (Berk. & Mont.) Arx

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    Symptoms (78)
    Sign (32)
    Asexual Spore (10)
    Fruiting Bodies (5)

  1. Commodity:         

    Cucumber (72)
    Watermelon (38)
    Cantaloupe (15)
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Image Descriptor Description
1574000 Symptoms Fruit lesions. September 1997
1573999 Symptoms Fruit lesions. September 1997
1573748 Symptoms Anthracnose lesions have a characteristic "shot hole" appearance. August 1997
1573749 Symptoms Anthracnose lesions have a characteristic "shot hole" appearance. August 1997
1573746 Symptoms Anthracnose lesions have a characteristic "shot hole" appearance once they've reached a certain size. August 1997
1573747 Symptoms Anthracnose lesions have a characteristic "shot hole" appearance once they've reached a certain size. August 1997
1573745 Symptoms Anthracnose lesions have a characteristic "shot hole" appearance once they've reached a certain size. August 1997
1573517 Sign Diseased cucumber leaf tissue showing dark, hair-like structures (setae) of Colletotrichum orbiculare as seen at low magnification (30-50X). July 1997
1573515 Sign Diseased cucumber leaf tissue showing dark, hair-like structures (setae) of Colletotrichum orbiculare as seen at low magnification (30-50X). July 1997
1573516 Sign Diseased cucumber leaf tissue showing dark, hair-like structures (setae) of Colletotrichum orbiculare as seen at low magnification (30-50X). July 1997
1573514 Sign Micrograph of diseased cucumber leaf tissue showing dark, hair-like structures (setae) of Colletotrichum orbiculare as seen at high magnification (100X). Two conidia can been seen near a leaf trichome. July 1997
1573513 Sign Micrograph of diseased cucumber leaf tissue showing dark, hair-like structures (setae) of Colletotrichum orbiculare as seen at high magnification (200X). Two conidia can been seen near a leaf trichome. July 1997
1573512 Sign Close-up of individual anthracnose lesion.  Dark flecks in the lesion are setae of Colletotrichum orbiculare. July 1997
1573511 Sign Dark, hair-like structures are setae of Colletotrichum orbiculare as seen at high magnification (100X), July 1997
1573509 Sign Dark, hair-like structures are setae of Colletotrichum orbiculare as seen at high magnification (200X), July 1997
1573507 Sign Dark, hair-like structures are setae of Colletotrichum orbiculare as seen at low magnification (30-50X), July 1997
1573510 Asexual Spore Conidia of Colletotrichum orbiculare as seen under a compound microscope.  July 1997
1573508 Fruiting Bodies Cucumber leaf tissue infected with Colletotrichum orbiculare as seen under a compound microscope.  Dark hair-like structures are setae of the fungus and are diagnostic of the disease. July 1997
5484698 Fruiting Bodies Vertical section of acervulus.
5481764 Symptoms
5481765 Symptoms
5481766 Symptoms
5481767 Symptoms
5481768 Symptoms
5481769 Symptoms
5481770 Symptoms
5481771 Symptoms
5481773 Symptoms
5481774 Symptoms
5481775 Symptoms
5481776 Symptoms
5481777 Symptoms
5481778 Symptoms
5481779 Symptoms
5481780 Sign
5481781 Symptoms
5481782 Symptoms
5481783 Symptoms
5481784 Symptoms
5481785 Symptoms
5481786 Symptoms
5481788 Symptoms
5481789 Symptoms
5481790 Symptoms
5481791 Symptoms
5481792 Symptoms
5481793 Sign
5481761 Symptoms
5481762 Symptoms
5481763 Symptoms
5484702 Symptoms Infected leaf
5484701 Asexual Spore Conidia
5484699 Fruiting Bodies Vertical section of acervulus.
5484700 Asexual Spore Vertical section of acervulus (partial view).
5484697 Fruiting Bodies Acervuli on leaf with setae evident.
5484696 Fruiting Bodies Acervuli on leaf with setae evident.
5479926 Symptoms Leaf spotsCultivar is 'Sprite'
5411471 Symptoms
5472674 Symptoms
5472675 Symptoms
5472676 Symptoms
5472677 Sign
5472678 Symptoms
5472679 Symptoms
1577301 Symptoms
1234188 Symptoms to stems
1234189 Symptoms to leaf
1436115 Symptoms to leaf
5430015 Sign Darkfield microscopy showing spore-producing bodies ("acervuli") with dark sterile hairs ("setae").
5430016 Sign Darkfield microscopy showing spore-producing bodies ("acervuli") with dark sterile hairs ("setae").
5430017 Sign Darkfield microscopy showing spore-producing bodies ("acervuli") with dark sterile hairs ("setae").
5430018 Sign Darkfield microscopy showing a single spore-producing body ("acervulus) with dark sterile hairs ("setae") and spores faintly visible.
1234190 Symptoms
5405331 Symptoms Young green-yellow fruit with depressed portions of infected tissue.
5405332 Sign Single infected area with clumped stromata covered in light tan-orange conidia.
5405333 Sign Close-up of clumped stromata covered in light tan-orange conidia.
5405334 Asexual Spore Spores of Colletotrichum orbiculare.
5405335 Asexual Spore Spores of Colletotrichum orbiculare.
5405330 Symptoms Young green-yellow fruit with depressed portions of infected tissue.
5430008 Symptoms Spotting on lower surface of leaves
5430009 Symptoms Spotting on upper surface of single leaf
5430010 Symptoms Spotting on lower surface of single leaf
5430011 Sign Close-up of spots with circular arrangment of spore-producing bodies ("acervuli")
5430012 Sign Close-up of spots with circular arrangment of spore-producing bodies ("acervuli")
5430013 Sign Close-up of spots with circular arrangment of spore-producing bodies ("acervuli")
5430014 Sign Close-up of single spot with circular arrangment of spore-producing bodies ("acervuli") with dark sterile hairs ("setae")
5430007 Symptoms Spotting on upper surface of leaves
1436111 Symptoms to leaf
5402968 Symptoms
5402967 Symptoms variety Sugar Baby
1563011 Symptoms Notice how centers of the leaf spots tend to fall out.
2178018 Asexual Spore
2178019 Asexual Spore
2178020 Sign
1563001 Symptoms Plant breeder evaluation of cultivars for disease resistance.  Far left row shows resistance to anthracnose.  Second row appears susceptible. 
1563002 Symptoms Left, Lewis Howe, County Agent and right Jamie Driver, Research Technician evaluating fungicides for controlling foliar diseases.  Note sandy soil typical of cucumber fields in eastern North Carolina. 
1563003 Symptoms Devastating consequences of anthracnose.
1563004 Symptoms Devastating effect of anthracnose in a commercial cucumber field in eastern North Carolina.  (ca. 1970)
1563005 Symptoms Volunteer cucumber seedlings following the spring crop provide inoculum for fall crop.
1563006 Symptoms anthracnose and downy mildew on the same plant
1563007 Symptoms Postharvest symptoms of anthracnose on slicing cucumber in the fall crop. 1962
1563008 Symptoms
1563009 Symptoms
1563010 Symptoms
1563012 Sign Close up of anthracnose leafspot showing slightly raised, salmon-colored acervuli with black, hair-like setae protruding.  Adaxial leaf surface. 
1563013 Sign Photomicrograph (400x) showing a leaf hair, three black setae, and many single cell conidia from a wet mount of an anthracnose leaf spot. 
1563014 Sign Photomicrograph (400x) showing a leaf hair, three black setae, and many single cell conidia from a wet mount of an anthracnose leaf spot.
1563015 Asexual Spore Photomicrograph (400x) showing hyaline, elongated, single celled conidia and black setae with pointed tips. 
1563016 Sign Photomicrograph (400x) showing hyaline, elongated, single celled conidia and black setae with pointed tips.
5368381 Sign View looking across the surface of infected leaf showing dark sterile hairs ("setae") protruding upward.
5368382 Asexual Spore Asexual spores of the fungus Colletotrichum orbiculare.
5368379 Symptoms Infected spots on leaf are often lighter in center with a darker border.
5368380 Sign Close-up of infected leaf tissue with spore-producing bodies ("acervuli") with dark sterile hairs ("setae").
5368697 Sign Close-up of infected leaf tissue with spore-producing bodies ("acervuli") with dark sterile hairs ("setae").
5368698 Sign Darkfield microscopy showing spore-producing bodies ("acervuli") with dark sterile hairs ("setae").
5368699 Sign Close-up of spore-producing bodies ("acervuli") with dark sterile hairs ("setae").
5368700 Asexual Spore Asexual spores of the fungus Colletotrichum orbiculare.
5368730 Symptoms Brown spotting on leaves and tan lesions on the leaf petioles and stems
5368731 Symptoms Multiple, tan infected areas coalesed on portion of the stem.
5368732 Symptoms Brown spotting on leaves and tan lesions on the leaf petioles and stems
5368733 Symptoms Individual leaf with tan/brown spots.
5076064 Symptoms Brown to black, sunken lesions with concentric rings within the lesion. Begins as small spots that enlarge. A pink spore mass can often be observed on the surface of the lesion.
5076091 Symptoms Anthracnose on Watermelon (Colletotrichum orbiculare); Brown, irregular shaped lesion. Center of lesion will "split" in later development leaving a "shot hole" appearance.
5077002 Symptoms Anthracnose on Watermelon; (Colletotrichum orbiculare); Elongated lesion on stem. May have white center with tan or brown outline. May be able to see "setae" that are black, hair-like structures using a 20X hand lens.
5076095 Symptoms Brown or tan angularly shaped spot. Structures called "setae" which are black and hair-like can sometimes be observed with a hand lens.

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