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29
Jul

Management of False Smut of Rice

- Use of recommended doses of fertilizer.

- Deep ploughing in summer stubbles.

- Avoid flow of irrigation water from infected fields to healthy fields.

- Chemical spray: 2 spray of 0.1% Propiconazole (Tilt) solution (1 gm/lt water).

First spray before panicle emergence and second spray 10 days just after panicle emergence.

29
Jul

False Smut of Rice

 

Symptoms: The fungus transforms individual grains into greenish spore balls of velvetty appearance.

Due to the development of the fructification of the pathogen, the ovaries are transformed into large velvetty green masses. Usually only a few spikelets in a panicle are affected.

Pathogen: Ustilaginoidea virens (Syn

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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