What’s Causes of Blight Disease Latest Top of 7

What’s causes of blight disease is a bacterial disease caused by bacteria called Xanthomonas oryzae pv. oryzae.

It is a bacterium of the pseudomonadaceae family. Decaying of power, leaf and stem tissue of plants is called blight. Bacterial scar is one of the most serious diseases of rice.

The spread of this disease is almost all over the world. Summer-dominantvariation is more harmful than winter-dominant variation.

Japanese farmers are believed to be the rst to discover this disease in 1884/85. Takashi proved in 1908 that this disease is caused by bacterial attack .

Cause of Disease

What’s causes of blight disease of Bacteria enter the rice plant through hydathode pores on the leaves, cracks at the base of

the leaves during the growth of new shoots on the stem, and other wounds. Suitable environment for survival of various weed bacteria,

diseased beech, diseased straw, diseased crop residues left on the ground etc. x. oryzae can survive for a long time in the seed and soil.

The bacteria easily enters the plant through the wounds caused by cutting off the leaf axils before transplanting.

It spreads from leaf to leaf and from tree to tree with the help of raindrops. Bacteria spread to other elds in the eld through infected eld water and infect the disease.

Symptoms of Disease

What’s causes of blight disease of The symptoms of this disease are usually limited to the leaves. The leaves are wet, semi-transparent and elongated spots are formed,

in most cases The spots start at the top of the leaf. The spots gradually enlarge on both sides and the spots become yellow or yellowish gray in color.

What’s causes of blight disease In the morning, translucent white juice slowly from the affected area. Eventually, various saprophytic fungi attack the lesion and turn gray.

If the attack is heavy, the leaves dry up quickly and nally the plant dies. Seedlings one to three weeks after planting can also be affected initially,

if the attack is heavy, the seedlings fall off. The yield is greatly reduced and most of the affected plants become stubble.

The disease starts around August September. Above all seedlings contain sterility. In tropical regions, the disease usually occurs during the emergence of rice grains.

Affected areas appear wavy and within a few days the leaves dry up and take on a straw color.

What’s causes of blight disease of Bacterial attack initially results in wet, semi transparent, and elongated spots on the leaves.

A white sticky (milky) sap accumulates on the leaves, which then dries up and forms small orange-colored pustules.

Along the affected leaves, several spots coalesce to form a large gray spot. Usually these symptoms are seen in the early stages .

Pathogen

What’s causes of blight disease is Bacterial scar of rice  caused by Xanthomonas oryzae pv. oryzae. It is rod shaped, (1.2 x 0.3 -0.5 pm) relatively thick and short.

They usually exist singly, sometimes two together, but do not form a chain. Gram negative bacteria and does not produce spores.

They do not have a capsule, but a flagellum. Bacteria produce round, smooth, waxy, yellowish and shiny colonies through agar.

It survives by accepting various grasses and wild rice as alternative feed

Prevention and Remedies

What’s causes of blight disease of The seeds should be cleaned before sowing. Treatment of seeds with bleaching powder (100g/ml) and

zinc sulfate (2%) greatly reduces the incidence of disease. Weeds should be destroyed before sowing.

Bleaching powder (2 kg per hectare) should be used with irrigation water. High yielding varieties of rice with disease resistance should be cultivated.

What’s causes of blight disease of the Nitrogen fertilizers should be applied in proper amount at time,

and should be planted without cutting the leaves. Seedbeds should be made on elevated land and the land should be cultivated well.

The land should be well dried before planting. The remaining part of the harvested crops should be burnt.

What’s causes of blight disease of The water should be kept low in the seedbed, there should be a system to remove the water during heavy rains.

Affected trees should be applied to Phenyl Sulfuric Acetate, M. Chloramphenicol in the amount of 10-12 liters.

Copper oxychloride should be spread on the land, it will reduce the incidence of disease.

For seed treatment, agrimycin (0.025%) and Wellabel Cereson (0.05%) should be soaked in mixed water for 8 hours and then dried in the light sun.

Streptocycline (3g/litter) and ceresan (0.1%) soaking for 8 hours to treat the seed. control for spray nske (5%) or (neem oil 3%) stress.

The bacterial blight control for extracting fresh cow dung spray (20g/litter) water dissolve use uperentant liquid. Use improved tolerant varieties like (IR 20) (IR 72).

Avoid excess nitrogen. Stop using water from one land on another land. Above all give 100% importance to seed treatment

Conclusion

What’s causes of blight disease of the Finally, we can learn from various studies that different types of plant diseases are closely related to bacteria.

They are responsible for the diseases of rice leaf blight, wheat tundu, mango gummy, round potato brown rot,

lemon canker, tomato, potato cucumber, pumpkin wind, bean blight etc. All studies agre that prevention is better than cure.

Reference:

https://www.sciencedirect.com/topics/agricultural-and-biological-sciences/leaf-blight