Evaluation of Mungbean Germplasm for Resistance Against Whitefly (Bemisia Tabaci Genn.) and Mungbean Yellow Mosaic Virus (MYMV) Disease

Field screening of 22 mungbean entries for resistance against whitefly and mungbean yellow mosaic virus (MYMV) were carried out during 2009 – 2010 at College Farm, College of Agriculture, Rajendranagar, Hyderabad. Resistant check (ML 267) and KM 200 recorded low whitefly population of 1.33 and 1.55/5 plants, respectively, whereas the susceptible check (WGG 2) recorded high mean population of whiteflies (9.11/5 plants) followed by MGG 350 (7.66/5 plants) and UPM 99(6.77/5 plants). The mungbean yellow mosaic virus (MYMV) incidence ranged from 5.66 to 58.29%. The resistant check ML 267 (5.66%) followed by LGG 407 (11.87%) recorded less incidence while the susceptible check WGG 2 showed high incidence (58.29%). The mungbean entries were categorized based on their resistance reaction to mungbean yellow mosaic virus (MYMV) on 0–5 scale. None of the entries were found to be highly resistant and the resistant check ML 267 (5.66%) showed resistant reaction while 12 entries with 11.87 to 19.12% disease incidence were found moderately resistant. Other 5 entries with 20.48 – 26.73% MYMV disease were moderately susceptible and the susceptible check WGG 2 with 58.29% disease incidence was categorized as highly susceptible. The entry ML 267 which showed resistant reaction to mungbean yellow mosaic virus (MYMV) recorded highest yield of 1103 kg/ha. Among the 12 moderately resistant lines, 4 lines viz, LGG 407, MGG 356, KM 200 and NM 1 which recorded the yield ranging from 831 to 972 kg/ha were found to be the promising lines against MYMV.