National Academy of Agricultural Sciences (NAAS)
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PRINT ISSN : 2319-7692
Online ISSN : 2319-7706 Issues : 12 per year Publisher : Excellent Publishers Email : editorijcmas@gmail.com / submit@ijcmas.com Editor-in-chief: Dr.M.Prakash Index Copernicus ICV 2018: 95.39 NAAS RATING 2020: 5.38 |
Basal rot is a major fungal disease that occurs in onion crop caused by Fusarium oxysporum f. sp. cepae (Hanazawa) Snyder &Hansen. Severe yield losses occur in the onion crop due to the rotting of bulbs. Survey was conducted in onion growing areas of Tirunelveli, Thoothukudi and Tenkasi districts and five isolates of Fusarium were isolated under in vitro. The isolates were confirmed by both morphological and cultural characters. Among the five isolates, FBR1 isolate from Vallanadu village was identified as a virulent isolate from the pathogenicity experiments and it covers the Petri Plate within seven days. The least growth was observed in the FBR5 isolate collected from Muthukrishnaperi village. Use of disease resistant sources is one of the non-chemical method to be suggested as an alternative approach to chemical methods. Among the eight genotypes screened against Fusarium oxysporum f. sp. cepae, Settikulam local (Perambalur) was found to record lower disease incidence (33.30 %) as compared to the check variety CO (On) 5 (11.11 %).
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