Identification of stable resistance sources for fungal foliar diseases in mungbean (Vigna radiata (L.) Wilczek)
Keywords:
Anthracnose, Cercospora leaf spot, Mungbean, Powdery mildew, ResistanceAbstract
Mungbean is an important pulse crop in India. Biotic and abiotic stresses are the major constraints in mungbean production. Among the biotic stresses, major fungal diseases such as anthracnose, powdery mildew (PM) and Cercospora leaf spot (CLS) cause significant yield losses. In the present investigation, 60 mungbean genotypes, along with four checks, were screened over two years for fungal foliar diseases to identify the stable resistant sources. The disease scores were converted to per cent disease index (PDI) and the genotypes were classified into different classes based on PDI values. The genotypes differed significantly for disease resistance response in both seasons. Among all tested genotypes, the wild-type resistant check Vigna trilobata was found to be immune to all fungal foliar diseases. The genotype GPM 19 showed a stable immune response to anthracnose and CLS. HUM 16 and CO 6 showed stable resistance to CLS. HUM 16, Samrat, IPM 2-3 and DGGV 191 showed stable resistance to Anthracnose and GPM 19 and Samrat showed stable resistance to PM across the seasons.
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