Symptoms:
In the beginning, you will see white or grey-green spots with dark green or brown edges on the leaves and collar of the rice plant. As the disease grows, these spots become bigger, oval or spindle-shaped, with a whitish or grey centre and red or brown border. These spots can join together and dry up the whole leaf. If the infection is severe, leaves dry, grain yield comes down, and even young plants or seedlings may die before tillering. This disease can attack all parts above the ground like leaf, collar, node, neck, and panicle.
Chemical & Dosage:
Tricyclazole 75% WP @ 120 g/acre (300 g/ha)
Azoxystrobin 23% SC @ 200 ml/acre (500 ml/ha)
Trade Name:
Tricyclazole 75% WP: Beam, SAAF
Azoxystrobin 23% SC: Amistar, Ortiva
Mode of Application:
Spray recommended fungicide on the crop at the early appearance of symptoms and repeat after 10–12 days if needed. Ensure thorough coverage of leaves and panicles for effective control. Use preventive sprays in fields with a history of blast or during favourable weather (cool, humid, frequent rain).
Symptoms:
– Small brown spots on leaves and grains
– Spots may have yellow halos and grayish centers
– Can cause yellowing and drying of leaves
– May lead to incomplete grain filling and reduced grain quality.
Chemical & Dosage:
Hexaconazole 5% EC @ 200 ml/acre (500 ml/ha)
Trade Name:
Contaf (Tata Rallis)
Tezas (Ramshree Chemicals)
Cordial (Ekhande Agro Fertiliser)
Hexakal (Kalyani Industries)
Mode of Application:
Spray on affected leaves
Symptoms:
Yellow stripes or water-soaked streaks develop along leaf blades, turning into larger yellow lesions with wavy edges. Leaves wilt, dry, and may show milky bacterial ooze, leading to stunted growth and reduced tillering.
Chemical & Dosage:
Copper oxychloride @ 500 g/acre
Streptomycin (as per label recommendations, often combined with copper fungicides)
Trade Name:
Copper oxychloride: Blitox,
Fytolan
Streptomycin: Agrimycin, Geomycin
Mode of Application:
Apply as foliar spray at early symptom appearance; repeat after 10–12 days if needed for effective coverage
Symptoms:
You will see greenish-grey, water-soaked spots on the lower leaf sheaths near the water level. These spots grow bigger, turn greyish-white with brown edges, and spread to leaves causing drying and blight.
Chemical & Dosage:
Validamycin 3% L @ 400 ml/acre
Propiconazole 25% EC @ 200 ml/acre
Trade Name:
Validamycin: Sheathmar,
Validacin
Propiconazole: Tilt
Mode of Application:
Spray the fungicide as soon as symptoms appear and repeat after 10–12 days if needed. Make sure to cover the affected parts well.
Symptoms:
– Sheaths turn brown with oblong spots.
– Panicle may not emerge properly or may remain partially enclosed.
– Affected areas may show rotting and discoloration.
Chemical & Dosage:
Carbendazim 50% WP @ 200 g/acre (500 g/ha).
Trade Name:
Bavistin (Crystal Crop Protection)
Dhanustin (Dhanuka Agritech Ltd)
Welldazim (FarmMate)
Crosstin (Shivalik Crop Sciences Pvt. Ltd)
Mode of Application:
Spray the recommended fungicide on affected sheaths
Symptoms:
– Greenish balls (smut) form on grains
– Grains turn yellow or green
Chemical & Dosage:
Propiconazole 25% EC @ 200 ml/acre (500 ml/ha)
Trade Name:
Tilt (Crystal Crop Protection)
Tobler (Sumitomo Chemical India Ltd.)
Bilt+ (FarmMate)
Propar (Indocell Crop Science)
Mode of Application:
Spray the recommended fungicide at the booting stage
Symptoms:
– Stunted growth
– Leaves turn yellow-orange
– Reduced tillering
Chemical & Dosage:
– No chemical cure is available
– Remove (rogue) infected plants from the field
– Use resistant rice varieties
Mode of Application:
Practice roguing and plant resistant varieties to manage the disease.