Study about Identification of Purple Blotch and Thrips Resistant Lines of Onion (Allium cepa L.)

Thirty six elite genotypes were evaluated during the winter season (rabi) 2022-23 at three different environments in 3 replications. RO-1, RO-59, RO-1 × RO-59, RO-1 × Pusa Madhavi, RO-59 × Pusa Madhavi, RO-59 × Kashi No. 1 genotypes had showed thrips population less than 22.90 and highly resistant to thrips infestation. Purple blotch disease, caused by Alternaria porri is the most common devastating disease of onion under field conditions throughout the globe. RO-1, Pusa Shobha, RO-1 × RO-59 and Bhima Kiran × Bhima Shakti were found resistant with a grade scale of 1. The per cent leaf area infection ranged from 1-10 per cent.