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27
Jul

Control Measures for Rice Brown leaf spot

Cultural practices to control Brown leaf spot:

1. Use disease free seeds for sowing.

2. Do not use high nitrogenous fertilizer.

3. Use resistant variety Amruth.

Chemical control of Brown leaf spot:

4. If the disease observed in the field than spray 2g mancozeb or 2.25g Zineb in 1liter of water.

27
Jul

Damage symptoms of Brown leaf spot

1. The symptoms of the disease appear on the coleoptile, the leaves, leaf sheath and also the glumes.

2. On the leaves the spots vary in size (1cm) and shape from minute dots to circular, eye shaped or oval spots is seen in the central portion.

3. The seeds are some times shriveled and discolored.

27
Jul

Details of Brown leaf spot disease

Period of occurrence: Seedling to maturity.

Extent of yield loss: 50-90% in extreme cases.

Collateral hosts: Digitaria sanguinalis, Leersia hexandra, Echinochloa colona, Pennisetum typhoides, Setariitalica, Cynodon dactylon.

 Favorable conditions for the pathogen:

 • Temperature of 25-30°C .

• Re

27
Jul

Brown leaf spot

1. Causal organism: Helminthosporium oryzae.

2. Local name:

3. Brown spot is a fungal disease that can infect both seedlings and mature plants. This disease is more severe in areas of poor management.

4. Major cause of 'Bengal Famine' in 1942, due to yield loss of 50-90%, resulting in death of 2 m people.

5. Epidemics r

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