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The fungus associated with late blight of tomato is:
Question

The fungus associated with late blight of tomato is:

A.

Phytophthora parasitica

B.

Phytophthora infestans

C.

Alternaria solani

D.

Plasmospora viticola

Correct option is B

The Correct Answer is: (B) Phytophthora infestans
Explanation:
The fungus responsible for the late blight of tomato is Phytophthora infestans. This pathogen causes severe damage to tomatoes, especially under cool, moist conditions.
Late blight is characterized by dark, water-soaked lesions on leaves, which eventually turn brown and result in the death of the plant.
Phytophthora infestans also affects potatoes and is known for its role in the Irish Potato Famine.
Information Booster:
  • The disease spreads rapidly under cool and moist conditions.

  • Dark, water-soaked lesions appear on leaves, stems, and fruits, causing extensive damage.

  • Phytophthora infestans is an oomycete fungus and is known for its high genetic variability, which makes controlling the disease challenging.

Additional Information:
  • Phytophthora parasitica: It is a pathogen of citrus and peppers.

  • Alternaria solani: Responsible for early blight of tomatoes.

  • Plasmospora viticola: Causes downy mildew in grapes.

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