sheath blight of rice pdf

1. How do you control the sheath blight of rice?
2. What is the causal organism of rice bacterial blight or sheath blight disease?
3. What is blight of rice?
4. What is neck blast?
5. How do you control blight sheath?
6. How do you control bacterial leaf blight?
7. How do you control rice disease?
8. What are the common diseases of rice?
9. What are the symptoms of anthracnose?
10. What is blight disease?
11. What is bacterial blight disease?
12. WHO reported Khaira disease of rice for the first time in India?
13. What are the stages of rice blast?
14. Which crop is affected by the disease called blast?
15. What are the symptoms of rice blast?
16. What is Khaira disease of rice?
17. What is brown spot of rice?
18. Which one of the following is downy mildew fungus?
19. How do you treat bacterial wilt?
20. In which disease of plant stems rot at soil line with brown to red lesions?
21. Which of the following is the common disease in groundnut?

How do you control the sheath blight of rice?

How to manage

1. use a reasonable level of fertilizer adapted to the cropping season.
2. use reasoned density of crop establishment (direct seeding or transplanting).
3. carefully control of weeds, especially on the levees.
4. drain rice fields relatively early in the cropping season to reduce sheath blight epidemics.

What is the causal organism of rice bacterial blight or sheath blight disease?

Sheath blight is a soilborne disease caused by the fungus Rhizoctonia solani AG1-IA. The fungus belongs to the phylum Basidiomycota, family Ceratobasidiaceae.

What is blight of rice?

Rice bacterial blight, also called bacterial blight of rice, deadly bacterial disease that is among the most destructive afflictions of cultivated rice (Oryza sativa and O. glaberrima). In severe epidemics, crop loss may be as high as 75 percent, and millions of hectares of rice are infected annually.

What is neck blast?

Blast is caused by the fungus Magnaporthe oryzae. It can affect all above ground parts of a rice plant: leaf, collar, node, neck, parts of panicle, and sometimes leaf sheath. ... When a node or neck blast infection is present, it can cause plants to develop few or no grains at all.

How do you control blight sheath?

Chemical methods

1. Control of sheath blight has been mainly through the use of foliar fungicides.
2. Carbendazim (1 g/lit), Propiconazole (1ml/lit) may be applied.
3. Spraying of infected plants with fungicides, such as Benomyl and Iprodione, and antibiotics, such as Validamycin and Polyoxin, is effective against the disease.

How do you control bacterial leaf blight?

Preventive method

1. Seed treatment with bleaching powder (100g/l) and zinc sulfate (2%) reduce bacterial blight.
2. Seed treatment - seed soaking for 8 hours in Agrimycin (0.025%) and wettable ceresan (0.05%) followed by hot water treatment for 30 min at 52-54oC;

How do you control rice disease?

The four most important strategies for rice disease management are to rotate crops, plant resistant varieties, plant in warm soil and use fungicides when necessary.
...
To minimize this disease:

1. Plant clean seed.
2. Treat seed with a fungicide.
3. Avoid late planting.
4. Apply Tilt at boot.
5. Apply recommended rates of nitrogen.

What are the common diseases of rice?

2.1, three fungal diseases, blast, sheath blight and sheath-rot, the bacterial disease, bacterial blight (BB) of rice and the viral disease, rice tungro disease (RTD), are listed as major diseases of rice. The list may not be entirely correct for certain rice ecologies of the world.

What are the symptoms of anthracnose?

Symptoms include sunken spots or lesions (blight) of various colours in leaves, stems, fruits, or flowers, and some infections form cankers on twigs and branches. The severity of the infection depends on both the causative agent and the infected species and can range from mere unsightliness to death.

What is blight disease?

Blight, any of various plant diseases whose symptoms include sudden and severe yellowing, browning, spotting, withering, or dying of leaves, flowers, fruit, stems, or the entire plant.

What is bacterial blight disease?

Bacterial blight is a widespread soybean disease that is most common during cool, wet weather. This disease usually occurs at low levels that don't result in yield loss. Bacterial blight can be mistaken for Septoria brown spot.

WHO reported Khaira disease of rice for the first time in India?

Dr. Y.L. Nene first discovered the Khaira disease of Rice in Tarai of UP of India in the year 1966. 4.

What are the stages of rice blast?

From the seedling stage through plant maturity, rice blast progresses through several phases starting with leaf blast, followed by collar, panicle and node blast.

Which crop is affected by the disease called blast?

Rice is one of the most important crop plants in the world, and the rice blast disease caused by the fungus Magnaporthe grisea is one of the most destructive diseases. The disease is widespread and causes severe losses.

What are the symptoms of rice blast?

The symptoms of rice blast include lesions that can be found on all parts of the plant, including leaves, leaf collars, necks, panicles, pedicels, and seeds. A recent report shows that even roots can become infected.

What is Khaira disease of rice?

Khaira disease of rice is caused due to deficiency of(1) Boron deficiency(2) Zinc deficiency(3) Magnesium deficiency(4) All of the above. The deficiency of zinc in rice causes khaira disease. They existed as smaller patches in the nursery or might be observed in the main-land of rice. The leaves are discoloured.

What is brown spot of rice?

Brown spot of rice is a plant fungal disease that usually occurs on the host leaves and glume, as well as seedlings, sheaths, stems and grains of adult host plants. ... Oval-shaped brown spots are the fungal growth sign, which have grey colored center developed on host leaves.

Which one of the following is downy mildew fungus?

Cucurbitaceae downy mildew (caused by Pseudoperonospora cubensis) is specific to cucurbits (e.g., cantaloupe (Cucumis melo), cucumber (Cucumis sativus), pumpkin, squash, watermelon (Citrullus lanatus) and other members of the gourd family). The disease is one of the most significant diseases of cucurbits worldwide.

How do you treat bacterial wilt?

Treatment and Control of Bacterial Wilt

1. Rotate your crops regularly.
2. Install raised beds.
3. Space plants out evenly to improve air circulation.
4. Test soil and amend to a pH of 6.2 to 6.5 for tomatoes and most garden vegetables.
5. Wash hands and gardening tools after handling infected plants.

In which disease of plant stems rot at soil line with brown to red lesions?

Explanation: In Rhizoctonia disease plant stem rot at soil line with brown to red lesions.

Which of the following is the common disease in groundnut?