Question:
The causal organism of downy mildew of grapevine is .
The causal organism of downy mildew of grapevine is .
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Downy mildew pathogens are oomycetes in the genus Plasmopara.
Updated On: Aug 9, 2026
- Plasmopara viticola
- Uncinula necator
- Phytophthora infestans
- Pythium aphanidermatum
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The Correct Option is A
Solution and Explanation
Step 1: Downy mildew of grapevine is caused by the oomycete Plasmopara viticola. Step 2: Uncinula necator causes powdery mildew of grape, not downy mildew. Step 3: Phytophthora infestans causes late blight of potato and tomato. Step 4: Pythium aphanidermatum causes damping off in seedlings. The correct causal organism for downy mildew of grapevine is option 1.
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