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A disease caused by a viroid is :...

A disease caused by a viroid is :

A

Potato blight

B

Bunchy top of papaya

C

Leaf curl of papaya

D

Potato spindle tuber

Text Solution

AI Generated Solution

The correct Answer is:
To solve the question about which disease is caused by a viroid, we will analyze each option provided: 1. **Potato Blight**: This disease is caused by a fungal pathogen known as *Phytophthora infestans*. Since it is caused by a fungus, this option is incorrect. 2. **Bunchy Top of Papaya**: This disease is caused by phytoplasma, which are similar to mycoplasma but specifically infect plants. Therefore, this option is also incorrect. 3. **Leaf Curl of Papaya**: This disease is caused by a virus known as the papaya leaf curl virus. As it is caused by a virus, this option is incorrect as well. 4. **Potato Spindle Tuber**: This disease is specifically caused by a viroid, which is a type of infectious agent that consists solely of a short strand of circular RNA. Thus, this option is correct. Based on the analysis of each option, the disease caused by a viroid is **Potato Spindle Tuber**. ### Summary of Steps: 1. Analyze each option given in the question. 2. Identify the causative agent of each disease listed. 3. Determine which disease is caused by a viroid. 4. Conclude that the correct answer is Potato Spindle Tuber.
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