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 |
Betelvine (Piper betel L.) is an important horticulture crop of commercial values and belongs to family Piperaceae. Betelvine is mainly grown under moist and humid shade conditions, which makes the crop more prone to many diseases. Among them foot rot caused by Phytophthora parasitica is a major one and leads to total crop loss. The mycelia of the fungus grew satisfactorily on the entire agar media used. Maximum radial growth of the pathogen was recorded on czapeck-dox agar after eight days of incubation. The optimum temperature for the mycelial growth of the fungus was observed at 20 oC followed by 25 oC and the least growth at 40 oC. The maximum mycelial dry weight of the pathogen was recorded at a pH 8 followed by pH 7. The result with respect to effect of relative humidity showed that maximum mycelial dry weight of P. parasitica at 90% followed by 85% and the least was noticed at 60%. Amongst the carbon sources supplemented, L-asparagine, was best utilized with the highest mycelia dry weight and the least was recorded in calcium carbonate. Whereas with respect to nitrogen sources the maximum mycelial dry weight was recorded in potassium nitrate and the least in ammonium phosphate.
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