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 |
Surveys conducted on the incidence of whiteflies (Bemisia tabaci Gen.) and viral diseases on bitter gourd at Bengaluru, Mandya, Mysuru, Tumkur, Kolar and Chikkaballapur districts of South Karnataka during 2015-16 and 2016-17. In2015-16Kharif, Disease Incidence (DI) ranged from 19.25 to 40.67% and Vulnerability Index (VI) 12.83 to 27.11%with a whitefly population of 2.74 to 5.81 per plant in Tumakuru and Mandya districts respectively. In rabi season, disease incidence ranged from 23.85 to 50.56% and vulnerability index 15.90 to 33.70% with a whitefly population of 3.32 to 7.23 per plant in Mysore and Chikkaballapur districts. During 2016-17, in Kharif, disease incidence ranged from 18.18 to 45.44% and vulnerability index 12.12 to 30.30% with a whitefly population of 2.54 to 6.51 per plant in Mysuru and Mandya districts, respectively. In rabi season, disease incidence ranged from 27.00 to 48.85% and vulnerability index was 18.00 to 32.57% with a whitefly population of 3.82 to 6.98 per plant in Mysore and Kolar districts respectively. A positive correlation with disease incidence and whitefly population on bitter gourd was obtained. The activity of whiteflies and the viral disease incidence recorded higher in rabi than in kharif.
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