Question

Black rust of wheat is caused by
A. Ustilago nuda
B. Puccinia graminis
C. Alternaria Solani
D. Xanthomonas oryzae

Answer 1

Hint: Puccinia graminis is a member of the Basidiomycota within the kingdom fungi in which streams are cereal rust and black that are caused by the fungus. Any variations of this type of fungus characteristics rust color on stems and leaves and stem rust fungus attack the parts of the plant which are present above the ground.

Complete answer:
The sixth most important plant in India is wheat that grows 220.4 million hectares in a year. Every year 60-70% wheat losses and according to world trade in wheat is greater than for all other crops combined. Major disease obtained from the wheat potential threat to the world food supply. 5 billion dollars are lost due to the cereal rust each year. And steam rust was a serious problem in ancient Greece and Rome. In 1767 Italian scientists first introduced the wheat disease of steam rust fungus in wheat. The stem rust disease in the wheat almost everywhere wherever the crop is grown in the World. The different parts of the world epidemics of steam rust of wheat occurred such as India, China, Australia and North America.

Therefore the correct option is (B).

Note: Inflected Black rust plants produced fewer tillers and sets of seeds in case of severe fungus infection to the plants. The pustules that invade the outer layer of the stalk present on the spores on the green land. The other name of the black stem rust is known as a stem rust that is caused by the Puccinia graminis found as a primary disease in the wheat plant.