Question

Match these microorganisms with the plants they affect.

$\begin{array}{cc}\text{Column I}& \text{Column II}\\ \text{a. Puccinia hordei}& \text{i. Okra}\\ \text{b.Yellow vein mosaic virus}& \text{ii. Oranges}\\ \text{c. Xanthomonas axonopodis}& \text{iii. Barley}\\ \text{d. Yellow rust}& \text{iv. Wheat}\end{array}$

• A. a­ iv, b­ i, c ­ii, d­ iii
• B. a ­ii, b ­iii, c­ i, d­ iv
• C. a ­iii, b ­ii, c ­iv, ­i
• D. a ­i, b­ iv, c ­iii, d­ ii

Answer 1

The correct option is A

a­ iv, b­ i, c ­ii, d­ iii

Puccinia hordei causes black rust in wheat. This causes blackening of the wheat plant and is one of the most widespread diseases of many cereal plants. Yellow vein mosaic virus affects okra (Bhindi) plant. It causes yellow and green patches to appear on okra plant leaves. This disease was discovered in India and Sri Lanka in the year 1940. Xanthomonas axonopodis causes citrus canker disease in citrus family plants like oranges. Yellow rust is a type of rust in barley.