Question : Which of the following pair of plant disease–microorganisms is correct?
I. Citrus canker – Virus
II. Rust of wheat – Fungi
Option 1: Only II
Option 2: Neither I nor II
Option 3: Only I
Option 4: Both I and II
Correct Answer: Only II
Solution : The correct option is Only II
The rust on wheat is indeed caused by fungi. The term "rust" refers to a group of fungal diseases that affect various plants, including wheat. The most common rust affecting wheat is Puccinia graminis. Wheat rusts can lead to characteristic reddish-brown pustules on the leaves, reducing the plant's ability to photosynthesise and ultimately affecting yield.
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