Rapeseed (Brassica napus L.)-Indian mustard [Brassica juncea (L.) Czernj. & Coss.] is the second most important oilseed crop after groundnut (Meena et al. 2010). In spite of higher yield potential, the diseases are major constraints, of which black rot caused by Xanthomonas campestris pv. campestris (Pammel) Dowson is becoming a threat to rapeseed-mustard crops in Uttar Pradesh (Singh et al. 2016). Disease can be controlled by using cultural, chemical, biological and host resistance methods. Antibiotics are mostly used for controlling the bacterial diseases and among them, streptocycline has been reported most effective antibiotics to control the disease (Kavathiya et al. 2017, Thakre et al. 2017). However, use of genetic resistance is an alternative to chemical and efficient control method to manage the black rot disease.
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