Disease
Grape white rot
Coniella diplodiellaGrape white rot is a fungal disease of grapevines caused primarily by Coniella diplodiella. It most often damages ripening clusters after hail, insect injury,…
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Plant problem library
Detailed profiles of common plant diseases, pests, nutrient deficiencies and environmental problems.
Disease
Cucurbit Anthracnose
Colletotrichum orbiculareCucurbit anthracnose is a fungal disease caused by Colletotrichum orbiculare. It affects cucumber, muskmelon, watermelon, squash, pumpkin and related cucurbits, producing tan to dark…
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Disease
Bean Anthracnose
Colletotrichum lindemuthianumBean anthracnose is a seedborne fungal disease caused by Colletotrichum lindemuthianum. It primarily affects snap, dry, lima, runner and related beans, producing brick-red to…
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Disease
Anthracnose
Colletotrichum gloeosporioidesColletotrichum gloeosporioides is a fungus historically associated with anthracnose, fruit rot, dieback and postharvest decay on many plants. Modern DNA studies show that the…
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Disease
Black Dot Disease
Colletotrichum coccodesBlack dot disease is a soil- and tuber-borne fungal disease caused by Colletotrichum coccodes. It is best known on potato, where it produces black…
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Disease
Anthracnose caused by Colletotrichum acutatum
Colletotrichum acutatum J.H. SimmondsColletotrichum acutatum is a fungal pathogen associated with anthracnose, fruit rots, blossom blight, and occasionally crown, stem, or leaf lesions on a wide range…
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Disease
Tomato bacterial canker
Clavibacter michiganensis subsp. michiganensisTomato bacterial canker is a serious, seedborne bacterial disease caused primarily by Clavibacter michiganensis subsp. michiganensis. It can move systemically through tomato vascular tissue,…
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Disease
Cucurbit Scab
Cladosporium cucumerinumCucurbit scab is a fungal disease caused by Cladosporium cucumerinum, most damaging on cucumber, summer squash, pumpkin, winter squash and melons. Cool, wet weather…
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Disease
Rhododendron–Spruce Needle Rust
Chrysomyxa rhododendri (DC.) de BaryRhododendron–spruce needle rust is a specialized rust disease caused by the fungus Chrysomyxa rhododendri. It alternates between rhododendron leaves and young spruce needles, producing…
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Disease
Cherry leaf roll virus
Nepovirus aviiCherry leaf roll virus is a graft- and nematode-transmitted viral disease primarily affecting sweet cherry and peach, with apple also documented as a host.…
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Disease
Gray leaf spot of corn
Cercospora zeae-maydisGray leaf spot of corn is a fungal foliar disease caused primarily by Cercospora zeae-maydis. It begins on lower leaves as small spots that…
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