Response of different blackgram [Vigna mungo (L.) Hepper] genotypes against mungbean yellow mosaic virus and whitefly (Bemisia tabaci Genn.)

Abstract

Mungbean Yellow Mosaic Virus (MYMV), a whitefly transmitted Gemini virus, is one of the severe constraints that afflict blackgram crop in India and other countries. Mungbean yellow mosaic disease incidence ranged between 3.73 (DKU-87) and 96.15% (LBG-623). Based on disease reactions, nine genotypes i.e., DKU-87, DKU-102, KPU-21, UG-281, KPU-6, KPU-29, KPU 12-1731, KPU 12-133 and PU 12-11 were categorized as resistant (0.85 to 1.50 score), while LBG-752 as moderately resistant (2.75) and genotypes OBG-32, KPU-1, KPU-22 and KPU-9 as susceptible whereas Co5 and LBG-623 as highly susceptible.Whitefly infestation was first noticed by 14 day after sowing and its population gradually increased till 70 DAS, which declined later with slight fluctuations in all genotypes. The highest whitefly population per plant was recorded in LBG-623 (7.55) which was followed by Co5 (7.34). A positive correlation (0.973) was observed between whitefly population and MYMV severity.