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01
Aug

Management of blast disease

A) Chemical control 1. Seeds should be soaked for 12 hrs in 0.1 % Carbendazim 50 WP (Bavistin, Derosol or JKstein) prior to sowing of nursery or broadcasting for upland rice. 2. Root dip treatment to the seedlings immediately after uprooting is recommended for 12 hrs in 0.1 % Carbendazim 50 WP (Bavistin, Derosol or JKstein) in low land crop. 3. Bavistin (0.1 %) followed by Hinosan (0.1 %) or Dithane M -45 (0.25%) should be sprayed at fortnightly interval beginning from first appearance of th
01
Aug

Symptoms of blast disease

1. Typical leaf lesions are spindle shaped, usually with reddish yellow margin; grey in the centre. 2. Leaves of susceptible varieties may be killed. The fungus may also attack the stems at nodes which turn dark brown to blackish in colour and tend to break easily. 3. Lesions may also occur on panicle neck. The infected necks turn blackish and break over. Neck blast results in few or no se
01
Aug

Blast disease

1. Causal organism -Magnaportha grisea is endemic in north eastern states. 2. This disease affects the crop at all the growth stages viz., nursery, tillering and flowering. 3. The yield loss ranges from 36 -50% depending upon the variety and environmental conditions
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