Question

The rusts are serious disease of our economic plants. The disease is caused by the fungus :

• A. Rhizopus
• B. Ustilago
• C. Puccinia
• D. Agaricus

Answer 1

The correct option is C Puccinia

Rusts are plant diseases caused by pathogenic fungi of the order Pucciniales (previously also known as Uredinales). Rust fungi are highly specialized plant pathogens with several unique features. Taken as a group, rust fungi are diverse and affect many kinds of plants. Rust fungi are obligate plant pathogens that only infect living plants. Infections begin when a spore lands on the plant surface, germinates, and invades its host. Infection is limited to plant parts such as leaves, petioles, tender shoots, stem, fruits, etc. Plants with severe rust infection may appear stunted, chlorotic (yellowed), or may display signs of infection such as rust fruiting bodies. Rusts are considered among the most harmful pathogens to agriculture, horticulture and forestry. Rust fungi are major concerns and limiting factors for successful cultivation of agricultural and forestry crops. White pine blister rust, wheat stem rust, soybean and coffee rust are examples of notoriously damaging, economically important crops.

So, the correct answer is 'Puccinia'.