Bacterial leaf blight (BLB) caused by Xanthomonas oryzae pv. Oryzae (Xoo) is a major seed-borne pathogen of rice and is. A threat to rice production in both temperate and tropical, rice-growing regions due to its high epidemic potential (Mew,, 1987). BLB of rice causes considerable losses in all cultivars of rice in India particularly in, the Punjab state of India.
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