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 |
Fertilizer doses phosphorus (P2O5) and potash (K2O) are known to influence the rice sheath blight disease. Two years of experimentation at Mountain Research Centre for Field Crops, conclusively proved that irrespective of K2O levels, increase in P2O5 from 40 to 80 kg ha-1, increases the disease incidence from 38.50 to 44.00 per cent, disease intensity from 16.93 to 18.60 per cent and decreases the yield from 4.95 to 4.75 t ha-1 while irrespective P2O5 levels, increase in K2O level from 20 to 40 kg ha-1 decreases the disease incidence from 38.50 to 29.25 per cent, disease intensity from 16.93 to 11.60 per cent and increases the grain yield from 4.95 to 5.25 t ha-1. The highest disease incidence (44.00%) and intensity (18.60%) was recorded at P3K1 (P2O5=80 kg ha-1 and K2O=20 kg ha-1) with a lowest grain yield of 4.75 t ha-1 while lowest disease incidence (29.25%) and intensity (11.60%) was recorded at P1K3 (P2O5=80 kg ha-1 and K2O=60 kg ha-1) with the highest grain yield of 5.25 t ha-1.The recommended doses of P2O5 and K2O (P2K2) resulted in 36.50 per cent disease incidence while disease intensity and yield were 15.20 per cent and 4.95 t ha-1, respectively.
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