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29
Jul

Management of Bacterial Leaf Blight (BLB) of Rice

- Burn the stubbles. - Use optimum dose of fertilizers

. - Avoid clipping of tip of seedling at the time of transplanting.

- Avoid flooded conditions.

- Remove weed hosts.

- Grow resistant cultivars like Birsamati, Birsa Vikas Dhan 110, Birsa Vikas Dhan 109, Hazaridhan, Sadabahar, Birsa Dhan 108, Shivam and Swarna showed resistance against bacterial leaf blight (BLB) of Rice.

- Seed Treatment: with Carbendazim 50 WP or Beam (Tricyclazole) @ 2 g

29
Jul

Pathogen of Bacterial Leaf Blight (BLB) of Rice

1. The bacterium Xanthomonas oryzae pv. Oryzae is strict aerobe, gram negative, non spore forming, rod shaped with size ranging from 1-2 x 0.8-1.0um with monotrichous polar flagellum of 6-8 um. The bacterial cells are capsulated and are joined to form an aggregate mass. Colonies are circular, convex with entire margins, whitish yellow to straw yellow later and opaque.

2. Favourable conditions: Clipping of tip of the seedling at the time of transplanting

29
Jul

Bacterial Leaf Blight (BLB) of Rice

 

Pathogen: Xanthomonas oryzae p.v. oryzae. Symptoms: 1. The disease is usually noticed at the time of heading but in severe cases occur earlier also. Seedlings in the nursery show circular, yellow spots in the margin, later enlarge, coalesce and cause drying of foliage . 2. “Kresek” symptom is seen in seedlings, 1-2 weeks a
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