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Plant Diseases

Like humans, diseases also affects plant kingdom. Following given some commonly occurring diseases in plant kingdom.

1. Viral Disease- Here given some viral diseases of plants.

Mosaic disease of tobacco- This disease caused by Tobaco Mosaic Virus (TMV). When affected the leaves of a plant get shrinked and small. The chlorophyll of the leaves damaged. To control this disease from spreading, the affected plants should be burnt.


Bunchy top of Banana- Banana virus causes this disease in plants. The plants becomes dwarf and all leaves bunched together on the top like a rose.

2. Bacterial Diseases - Here given some viral diseases of plants.

Wilt of Potato- This is also known as ring disease, a brown ring formed on the xylem. This disease is caused by bacteria called Pseudomonas solonacearum. In this disease the conduction system of the plant is affected.

Black arm of Cotton – This disease is caused by Xanthomonas bacteria. In this disease a watery spot of brown color formed on the leaves.

Bacterial Blight of Rice- This disease is causes by Xanthomonas oryzae bacteria. An yellow-greenish spot is found on both side of leaves affected with this disease. Vascular bundles get blocked due to growth of bacteria.

Citrus Canker – This disease is caused by Xanthomonas citri bacteria. In this disease whole plant including leaves, branches, fruits get affected. This disease was first seen in China.

Tundu Disease of Wheat- This disease caused by Corinobacterium titrici bacteria and Enzuina Titriki Nematode. In this disease lower parts of the leaves are faded and turned.

3. Fungal Diseases – The diseases caused by different types of fungi to plants called fungal diseases.

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