Disease
Rose black spot
Diplocarpon rosaeRose black spot is a fungal disease caused by Diplocarpon rosae, affecting cultivated and wild roses throughout humid or frequently wet growing conditions. It…
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Plant problem library
Detailed profiles of common plant diseases, pests, nutrient deficiencies and environmental problems.
Disease
Apple blotch (Marssonina blotch)
Diplocarpon mali Harada & Sawamura; commonly treated as a synonym or earlier name of Diplocarpon coronariae (Ellis & J.J. Davis) Wöhner & Rossman. Marssonina coronaria is the former anamorph name.Apple blotch, also called Marssonina blotch, is a fungal disease of apple caused by Diplocarpon mali, currently treated taxonomically in many references as Diplocarpon…
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Disease
Ascochyta blight of chickpea
Didymella rabieiDidymella rabiei is the sexual-stage name associated with Ascochyta blight of chickpea; the asexual stage is commonly called Ascochyta rabiei. This host-specific fungal disease…
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Disease
Gummy Stem Blight and Black Rot
Didymella bryoniae (synonym: Stagonosporopsis cucurbitacearum; anamorph: Phoma cucurbitacearum)Gummy stem blight and black rot is a fungal disease of cucurbits caused by Didymella bryoniae, with leaf blight, cracked stem lesions that may…
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Disease
Raspberry Spur Blight
Didymella applanataRaspberry spur blight is a fungal disease caused by Didymella applanata, most damaging to red raspberries and also reported on other Rubus plants. Brown…
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Disease
Dickeya solani blackleg and soft rot of potato
Dickeya solaniDickeya solani is an aggressive bacterial pathogen primarily associated with potato blackleg and tuber soft rot. It is most often introduced in infected seed…
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Disease
Phomopsis cane and leaf spot of grape
Diaporthe ampelinaPhomopsis cane and leaf spot is a fungal disease of grapevines caused primarily by Diaporthe ampelina, historically known as Phomopsis viticola. It produces dark…
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Disease
Cytospora Canker
Cytospora chrysospermaCytospora chrysosperma causes a serious canker and dieback disease of poplars, aspens, cottonwoods, and willows, especially when trees are weakened by drought, winter injury,…
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Disease
Bacterial Wilt of Dry Bean
Curtobacterium flaccumfaciens pv. flaccumfaciensBacterial wilt of dry bean is a seed-borne vascular disease caused by Curtobacterium flaccumfaciens pv. flaccumfaciens. It is most important in common bean production…
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Disease
Cucumber mosaic virus
Cucumber mosaic virusCucumber mosaic virus is a widespread viral disease affecting cucumbers, other cucurbits, vegetables, ornamentals, and weeds across the United States. Infected plants commonly develop…
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Disease
Chestnut blight
Cryphonectria parasitica (Murrill) M.E. BarrChestnut blight is a destructive fungal canker disease caused by Cryphonectria parasitica. It attacks the inner bark and cambium of chestnut stems and branches,…
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Disease
White Pine Blister Rust
Cronartium ribicola J.C. Fisch.White pine blister rust is a serious, often fatal fungal disease of five-needled white pines caused by Cronartium ribicola. It produces yellow-orange spots and…
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