Question

_____________ is a bacterial disease in plants.

Answer 1

Hint: The types of diseases caused by bacterial infections in plants are called bacterial diseases.
Various bacterial diseases found in plants are granville wilt, fire blight, a wildfire of tobacco, the blight of beans, soft rot, crown gall, aster yellows, and citrus stubborn disease.

Correct answer:
Granville wilt is a bacterial disease in plants. The name of the causative agent of granville wilt is Pseudomonas solanacearum. The granville wilt disease is commonly found in tobacco, tomato, potato, eggplant, pepper, and other plants. Stunting, yellowing, and wilting of parts above ground; roots decay and become black or brown are symptoms and signs of granville wilt bacterial disease. Granville occurs in most countries in temperate and semi tropical zones. This disease causes crop losses of hundreds of millions of rupees or dollars.

Additional Information:
The pathogenic bacteria can cause severe and often fatal diseases in plants.
Plant pathogenic bacteria cause many various kinds of symptoms that include galls and overgrowths, wilts, leaf spots, specks and blights, soft rots, also as scabs and cankers.
Bacterial diseases are affected greatly by the moisture and temperature of the environment. A difference of only a few degrees in temperature decides whether a bacterial disease will develop or not.
In most cases, moisture as a water film on plant surfaces is important for establishing an infection.
Based on the extent of damage to plant tissue and the symptoms that they cause, the bacterial diseases can be grouped into four broad categories.
Tumour diseases are caused by bacteria that stimulate the uncontrolled multiplication of plant cells, leading to the formation of abnormally large structures.
Bacterial pathogens enter the plant’s body via wounds, principally produced by adverse climate conditions, humans, tools and machinery, insects, and nematodes, or through natural openings like stomata, lenticels, hydathodes, nectar-producing glands, and leaf scars.

Note:
When conditions are not favorable for the growth and multiplication, bacteria remain dormant on or inside plant tissue. Some bacterial diseases such as the crown gall bacterium may survive for months or years within the soil.
Against bacterial blights of beans and celery, fire blight, crown gall, blackleg of delphinium, and hazelnut and walnut blights for their control protective bactericidal sprays, paints, or drenches containing copper or antibiotics are used.