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30
Jul

Economic Importance of Bacterial Leaf Blight of Rice

1. The extent of yield loss depends on the growth stages of the crop at which it is infected, the level of susceptiblility of the cultivar, season, climatic condition and level of nitrogen fretilizer applied. 2. The damage may be due to partial or total blighting of the leaves or complete wilting of the affected tillers leading to unfilled grains. 3. When the disease occurs at the maximum tillering stage the yield reduction may be 70% in susceptible cultivars like TN 1 and up to 20% i
30
Jul

History, occurrence and distribution of Bacterial Leaf Blight of Rice

1. Bacterial leaf blight of rice caused by Xoo is one of the most destructive diseases of rice in majority of the rice growing countries especially in Asia.

2. Though the disease has been known in Japan since 1884, its bacterial nature was established in 1922. Subsequently the disease was reported from most of the rice growing countries.

3. In India the first authentic report of typical Blb symptoms was made by Bhapkar and co-workers in 1960. The disease broke out in epidemi

30
Jul

Bacterial Leaf Blight of Rice

1. In India, rice is cultivated in highly diverse climatic and agro-ecological conditions. About 60-65% of the Indian population depends on rice as the primary source of nutrition. 2. India ranks first in the world in terms of area (44.6 m ha) under rice cultivation and second in terms of production (93.3 m tones). Due to accelerating loss of productive rice land farmers have adopted intensi
30
Jul

Management options of Bacterial Leaf Streak of Rice

i. Varietal Resistance Grow resistant varieties like Bala, Padma, Sabarmati and moderately resistant varieties like Krishna, Jamuna etc. Use certified seeds from the reliable sources. ii. Cultural practices  The disease can be controlled by proper application of fertilizers and proper planting spacing.  Practicing field sanitation is important. Ratoons, straws and volunteer seedlings left after harvest can be destroyed to minimize the initial inoculum at the beginning of the season.
30
Jul

Host range of Bacterial Leaf Streak of Rice

Species of wild rice such as Oryza spontanea, O. perennis balunga, O. nivara, O. breviligulata, O. glaberrima, and Leersia hexandra Sw. (southern cutgrass) are alternate hosts of the disease.
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