Note watersoaking of vein.
Foliar Diseases
For a larger view and narrative of each disease please click on the photo.
Photos provided by Tom Isakeit, Department of Plant Pathology, Texas A&M
University.
BACTERIAL FRUIT BLOTCH - Causal Agent: (bacterium - Acidovorax avenae subsp. citrulli)
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Note watersoaking of vein. |
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GUMMY STEM BLIGHT - Causal Agent: (fungus - Didymella bryoniae)
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 note pycnidia (black) |
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DOWNY MILDEW - Causal Agent: (fungus - Pseudoperonospora cubensis)
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ALTERNARIA LEAF SPOT - Causal Agent: (fungus - Alternaria cucumerina)
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CERCOSPORA LEAF SPOT - Causal Agent: (fungus - Cercospora citrullina)
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MYROTHECIUM LEAF SPOT - Causal Agent: (fungus - Myrothecium roridum)
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POWDERY MILDEW - Causal Agent: (fungi - sphaerotheca fuliginea, Erysiphe cichoracearum)
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LEAF MOSAIC - Causal Agent: (viruses - Watermelon Mosaic Virus, Papaya Ringspot Virus, Zucchini Yellow Mosaic Virus, Cucumber Mosaic Virus)
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TOBACCO RING SPOT VIRUS
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SQUASH LEAF CURL VIRUS
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HERBICIDE INJURY - (2,4-D, or Dicamba)
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