Causal Agent:
Fungus (Cercospora brassicae)
| Characteristic Symptoms: | |
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Leaf spots appear as angular or circular pale green to gray or white with brown border |
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The disease is sometimes called frog-eye leaf spot |
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Leaf defoliation can be observed in severe infection |
| Conditions for Disease Development | |
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Cool temperature and frequent rain are necessary for spore germination and infection. |
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The pathogen is can survive in volunteer crops and weeds and can be spread by water-splashes and wind
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| Management and Control: | |
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Use of resistant variety (if available).
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Remove infected leaves immediately to prevent spread of the disease. |
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Avoid overhead irrigation. |
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Spray with fungicides with such as Azoxystrobin (e.g. Amistar®) or Pyraclostrobin (e.g. Cabrio®). |
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