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 |
Spot blotch in wheat (Triticum aestivum L.) is mainly caused by Bipolaris sorokiniana (Sacc.) Shoem in India and south Asian countries and inflected losses in yield up to 50 per cent. The isolates of B. Sorokiniana (BS1 to BS10) isolated from blighted leaf samples collected from different part of Jammu sub-tropics. Cultural and morphological variability of B. sorokiniana isolates exhibited that the colonies were effuse grey-white to effuse black and velvety-white mycelial growth with regular to irregular margins. The colour of colonies varied from grey to dark brown and white to light grey. The number of septation in isolates ranged from 3.9 to 6.3 and spore size ranged from 35.07 to 60.53µm in length and 13.20 to 17.60µm in breadth. The shape of the spore was elliptical, slight curved and straight with tapered end. The isolates of B. sorokiniana later spray (inoculated) on seedlings of a differential set of wheat genotypes viz., Sonalika, PBW-343, HD 2733, PBW 2967 and PBW 660. On the basis of host pathogen interaction, isolates BS2 and BS9 were categorised as highly virulent, whereas isolates BS7 and BS10 as least virulent. However, isolates BS2, BS3, BS4, BS5, BS6 and BS8 were categorized as a moderately virulent.
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