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C2.3. Morels. The surface of a morel is lined with millions of asci, each containing eight ascospores.
C2.8. Phytophthora blight of tomatoes. Tomato fruits in direct contact with excessively wet soil are highly vulnerable to infection.
C2.10. The underside of a grapevine leaf showing downy mildew. These are the sporangia of the pathogen. Downy mildew develops in moist conditions in the dark.
C2.11. Downy mildew of grape on a young berry. The downy appearance of the hyphae and sporangia give the pathogen its name.
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