Sushila Choudhary1*, Ramphool Ghasolia2, Rekha Choudhary3, Ranjana Meena4 and Priyanka1
1Department of Plant Pathology, S.K.N.A.U., Jobner- 303329 (Rajasthan), India
2Department of Plant Pathology, S.K.N.A.U., Jobner- 303329 (Rajasthan), India
3Department of Genetics and Plant Breeding, S.K.N.A.U., Jobner- 303329 (Rajasthan), India
4Department of Plant Pathology, S.K.N.A.U., Jobner- 303329 (Rajasthan), India
Email: scpath16220@gmail.com
Received-06.04.2022, Revised-18.04.2022, Accepted-29.04.2022
Abstract: Leaf spot infected leaves of lehsua were collected from Horticulture Farm, Asalpur, SKN College of Agriculture, Jobner (Jaipur). Pathogen was isolated, purified and identified with the Indian Type Culture Collection, No. 10,627.17 and confirmed as Alternaria alternata and its pathogenicity was proved. The symptoms of Alternaria leaf spot appeared 15 days of inoculation during pathogenicity. In field conditions it was cause considerable yield losses. Under in- vitro conditions the mycelial growth of Alterrnaria alternata was recorded maximum at 25 0C temperature, 100 per cent relative humidity and 6.5 pH. Potato Dextrose Agar medium supported best mycelial growth among the media under study.
Keywords: Cordiamyxa, Lehsua, Alternaria leaf spot, Pathogenecity, In-Vitro studies
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