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 |
Survey conducted during the year 2018 and 2019 at three stage of crop growth of onion in six districts of the Bihar revealed the prevalence of disease in all onion growing areas of the Bihar during the month of 2nd fortnight of August, September and October, while during the month of prevalence of disease was recorded at only few locations with less intensity, while as rest of the locations were disease minimum incidence with overall incidence of 2.47, 24.58 and 39.07 and intensity of 0.99, 6.02 and 16.77 %, during the month of August, September and October, respectively. The disease was severe during 2019 with overall mean disease incidence of 2.76, 25.34 and 41.32 and intensity of 1.15, 6.52 and 17.45 % in comparison to 2018 with overall incidence of 2.17, 23.82 and 37.78 and intensity of 0.83, 5.52 and 16.09 %, during the month of August, September and October, respectively. Perusal of the pooled data of two years revealed that the disease incidence and intensity in surveyed districts varied from 31.50 to 57.97 and 14.19 to 18.26 %, respectively with highest incidence and intensity recorded in Patna and lowest in Samastipur of the 6 districts surveyed, highest disease incidence (61.99%) was recorded at Barh Patna followed by Fatuwa (60.16%), Patna city (55.16 %), Danapur (54.56 %), Bhojpur Kadid (50.86 %), Dumraon (49.39 %), Turiganj (47.70 %) and Raghunathpur (42.56 %) Whereas highest disease intensity (22.89 %) was recorded at Barh Patna followed by Bhojpur Kadid Baxur (22.02 %), Begusarai (21.55 %), Harnaut Nalanda (21.07 %), Desari Vaishali (20.60 %), Dumraon Baxur (20.48 %), Fatuwa Patna (20.06 %) and least incidence (29.04 %) in Bihar Sharif was recorded and least intensity (11.02 %) in Dalsinghsarai Samastipur was recorded.
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