Study about Identification of Purple Blotch and Thrips Resistant Lines of Onion (Allium cepa L.)
Kamal Mahala *
Department of Horticulture, S. K. N. College of Agriculture, Jobner, Jaipur, India.
D.K.Yadav
Department of Horticulture, S. K. N. College of Agriculture, Jobner, Jaipur, India.
Deepak Gupta
Department of GPB, S. K. N. College of Agriculture, Jobner, Jaipur, India.
M. R. Choudhary
Department of Horticulture, S. K. N. College of Agriculture, Jobner, Jaipur, India.
Pushpa Ujjainiya
Department of Horticulture, S. K. N. College of Agriculture, Jobner, Jaipur, India.
Manika Goswami
Department of Horticulture, Y.S.P.U.H.F., Nauni, Himachal Pradesh, India.
*Author to whom correspondence should be addressed.
Abstract
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.
Keywords: Onion, Allium cepa L, germplasm, purple blotch disease, thrips