Question

Which of the following disease of plant is known as 'Ring Disease'?
1. Sclerotinia
2. Wilt of Potato
3. Powdery mildew
4. Stem rust

Answer 1

Correct Answer - Option 2 : Wilt of Potato

The Correct Answer is Wilt of Potato.

• Wilt of Potato is a disease of the plant caused by bacteria. It is also known as ring disease because a brown ring is formed on the 'Xylem'.
• Wilt diseases are any number of diseases that affect the vascular system of plants. Attacks by fungi, bacteria, and nematodes can lead to rapid killing of plants, large tree branches, or even whole trees. Plants also contain viruses. 

• Sclerotinia is a genus of fungi in the family Sclerotiniaceae. The widely distributed genus contains 14 species.
• Powdery mildew is a fungal disease that affects a wide range of plants. Powdery mildew diseases are caused by many different species of fungi in the order Erysiphales, with Podosphaera xanthii being the most commonly reported cause.
• The stem, black, and cereal rusts are caused by the fungus Puccinia graminis and are a significant disease affecting cereal crops.