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 |
Fifteen isolates of fluorescent pseudomonads were tested against the mycelial growth of Alternaria porri, the causal agent of purple blotch disease of onion. In vitro studies indicated that the isolate EFP1 exerted the maximum inhibition (74.40%) on the mycelial growth showing 2.15 cm colony diameter of the pathogen as against 8.40 cm in the control. Two field trials were conducted one at Cotton Research Station Farm, Veppanthattai and another at Arumbavur, Perambalur Dt. to test the efficacy of talc-based formulation of Pseudomonas fluorescens (EFP1) against onion purple blotch disease. Among the treatments, Pseudomonas EFP1 applied as seed (bulb) treatment (10g/kg) + soil application (SA) (2.5 kg/ha) + 3 foliar spray (FS) (3g/lit) at 30, 45 and 60 days after planting (DAP) recorded the least purple blotch incidence of 5.43, 7.05 and 6.24 PDI at 35, 50 and 65 days after planting (DAP), respectively. The same treatment also recorded the higher bulb yield of 15.4 t/ha) with the BC ratio of 1:5.51.
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