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27
Jul

Nature of damage of Yellow stem borer

 

1. It is a major pest of rice and is very serious in double cropped areas.

2. The caterpillar bores into the stem and feeds internally causing death of the central shoot. This is called “dead –heart.”

3. If crop is attacked during reproductive phase the damaged plants bears empty white ears locally c

27
Jul

Yellow stem borer (Khod kida)

 

1. Pest Name - Yellow stem borer.

2. Scientific Name - Scirpophaga incertulas.

3. Local Name - Khod kida.

4. Pests characteristics - Regular in occurrence throughout the year.

5. Infestation intensities - Low to severe upto 80.00 per cent.

6. Crop Growth stages - All stages of crop growth i.e. seedling, tillering and boot leaf stage.

27
Jul

Symptoms of Bacterial Leaf Streak disease

 

1. Bacterial Leaf Streak first appears as short, water-soaked streaks between the veins, which become longer and translucent and turn to light brown or yellowish brown.

2. Large areas of the leaf may become dry due to numerous streaks. At the later stage the disease is indistinguishable from the bacterial leaf blight.

3.The

27
Jul

Bacterial Leaf Streak (BLS) of rice

 

1. Causal Organism : Xanthomonas oryzae pv. oryzicola.

  2. Bacterial Leaf Streak The disease is usually observed during the tillering stage of the rice crop.

3. The rice plant can easily recover at the later growth stages and grain yield losses are minimal.

4. Losses as high as 32.3% in 1000-grain weight due to

27
Jul

Management of Bacterial Leaf Blight disease

 

1. Use seed from disease free crop.

2. Treat the seeds by soaking it for 12hrs in a mixed solution of streptocycline(0.15%) and wetable Ceresan (0.05%) followed by hot water treatment at 52oC-54oC foe 30 minutes.

3. Growing resistant varieties is the best way to disease management, some of the commercially cultivated

27
Jul

Management of Bacterial Leaf Blight disease

 

1. Use seed from disease free crop. 2. Treat the seeds by soaking it for 12hrs in a mixed solution of streptocycline(0.15%) and wetable Ceresan (0.05%) followed by hot water treatment at 52oC-54oC foe 30 minutes. 3. Growing resistant varieties is the best way to disease management, some of the commercially cultivated re
27
Jul

Symptoms of Bacterial Leaf Blight disease

1. The bacterium induces either wilting of plants or leaf blight. Wilting syndrome known as 'Kresek' occurs sporadically in the fields causing serious damage.

2. Bacterial leaf blight commonly occurs within 3-4 weeks after transplantation of the crop. Kresek results either in the death of whole plants or wilting of only a few leaves.

27
Jul

Bacterial Leaf Blight disease

1. Causal Organism: Xanthomonas compestris pv. Oryzae.

2. Bacterial blight is a monsoon disease and its incidence and severity is very much influenced by rainfall, number of rainy days, and susceptibility of the cultivar and nitrogen fertilizer application.

3. Severe epidemics recorded in 1979 and 1980 in northwestern India, reducing the grain yields

27
Jul

Management Practices for Control of Sheath Rot Disease

1. Removal of infected stubbles after harvest and optimum plant spacing are among the cultural practices that can reduce the disease.

2. Application of potash at tillering stage is also recommended. Foliar spray of calcium sulfate and zinc sulfate was found to control sheath rot.

3. At booting stage, seed treatment and foliar spraying with carbendazim or mancozeb was found to reduce sheath rot.

4. Foliar spraying with benomyl and copper oxychloride were also found to be effe

27
Jul

Symptoms of Sheath rot disease

1. Infection occurs on the uppermost leaf sheath enclosing the young panicles at late booting stage.

2. Initial symptoms are oblong or irregular spots or lesions, 0.5-1.5 cm long, with dark reddish brown margins and gray centre.

3. Lesions may also consist of diffuse reddish brown discoloration in the sheath.

4. Lesions enlarge and often coalesce and ma

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