1. Bacterial Leaf Streak of Rice disease is usually observed during the tillering stage of the rice crop.
2. If the Bacterial Leaf Streak appeared in the later growth stages, the rice plant can easily recover and grain yield losses are minimized.
3. Preferred scientific name: Xanthomonas oryzae pv. oryzicola (Fang et al. 1957) Swings et al. 1990.
Chemical control of Bacterial Blight,
1. Seed treatment with streptocycline @ 0.5 g/lit. Prepare 50 liter water solution using the streptocylcine and soak for 24 hrs, dry under shade and use for sowing.
2. Foliar spray with streptocycline @ 0.4 g + copper oxychloride @ 1 g /lit of water at 50 DAT and at seed setting stage.
3. Copper fungicides containing 50% copper oxychloride have been found to be quite effective.
4. Agrimycin-100 has also been reported to be effective against bacte
1. Symptoms appear on leaves of young plants, after planting out, as pale-green to grey-green, water-soaked streaks near the leaf tip and margins. These lesions coalesce and become yellowish-white with wavy edges.
2. The whole leaf may eventually be affected, becoming whitish or greyish and then dying. Leaf sheaths and culms of more susceptibl
1. Common names: rice leaf blight, rice bacterial leaf blight, rice kresek disease, bacterial leaf blight of rice, kresek disease.
2. Preferred scientific name: Xanthomonas oryzae pv. Oryzae (Ishiyama 1922 Swings et al. 1990).
3. Bacterial leaf blight is one of the most destructive diseases of rice in India especially in the irrigated and rainfed lowland ecosystems.
Control measures of Udbatta Disease include cultural and chemical measures.
Cultural practices: Clean seeds should be used to minimize the occurrence of the disease.
Burn the infected plants or plants showing udbatta symptoms.
Hot water seed treatment at 540C for 10 minutes.
Removal and destruction of diseased panicles in field .
Chemical Practices: Hot water treatment at 540C for 10 min and fungicide such as Granosan MDB + Vitav
1. Spikes infected by E. oryzae become somewhat mummified with partially formed buds and, in time, become darker in colour and more stromatic as conidial acervuli develop on the surface. When wet, these conidial acervuli appear gelatinous and produce a saucer-shaped fructification bearing a palisade of conidiophores.
2. Infected plants are
Common names of Udbatta Disease : Udbatta disease, Udbatta, Black choke, Incense rod, False ergot, Black ring, Sterility disease, Agarbatti disease of rice.
Preferred scientific name of Udbatta Disease: Balansia oryzae-sativae (Hashioka, 1971).
Economic importance of Udbatta Disease: The disease is consi
1. Symptoms become evident on infected grains after flowering: a grain turns into a large velvety mass (pseudomorph). The pseudomorphs are small to more than 1 cm in diameter, and enclose the floral parts. The colour changes from silvery-white to orange-yellow to olive-green when mature.
2. In the early state, the spore ball is enclosed in a whitish membrane, which late
Common names of False Smut disease: False smut, green smut.
Preferred scientific name of False Smut: Ustilaginoidea virens (Cke.) Tak. (1896) [anamorph].
Distribution and Occurrence of False Smut: Found in coastal areas of Karnataka and sporadic (Singh, 1984 and POS report,
Control measures of Foot Rot Bakanae disease include cultural and chemical control measures.
Cultural practices: Clean seeds should be used to minimize the occurrence of the disease. Salt water can be used to separate lightweight, infected seeds from seed lots and thereby reduce seed borne inoculum.
Chemical control: Seed treatment with Triforine, and Triflumizole for checking the seed borne infection of the pathogen. Triflumizole, Propiconazole