Question:
Wart diseases of potato is caused by:
Wart diseases of potato is caused by:
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Potato Wart is a "Quarantine Disease" in India (mostly restricted to Darjeeling). *Synchytrium* is unique because it is a primitive fungus that produces motile zoospores.
Updated On: May 21, 2026
- Protomyces macrosporus
- Alternaria solani
- Phytophthora infestans
- Synchytrium endobioticum
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The Correct Option is D
Solution and Explanation
Concept:
Potato Wart is a severe, soil-borne fungal disease that causes cauliflower-like growths on the tubers. It is a quarantine pest in many countries.
Step 1: Identify the causal organism.
The disease is caused by the chytrid fungus Synchytrium endobioticum. This fungus is an obligate parasite that produces resting spores capable of surviving in the soil for decades.
Step 2: Distinguish from other potato pathogens.
*Phytophthora infestans* (3) causes Late Blight. *Alternaria solani* (2) causes Early Blight. *Protomyces macrosporus* (1) causes Stem Gall of coriander. Therefore, option (4) is the specific causal agent for potato wart.
Step 1: Identify the causal organism.
The disease is caused by the chytrid fungus Synchytrium endobioticum. This fungus is an obligate parasite that produces resting spores capable of surviving in the soil for decades.
Step 2: Distinguish from other potato pathogens.
*Phytophthora infestans* (3) causes Late Blight. *Alternaria solani* (2) causes Early Blight. *Protomyces macrosporus* (1) causes Stem Gall of coriander. Therefore, option (4) is the specific causal agent for potato wart.
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