Screening and identify of Mungbean [Vigna radiata (L.) Wilczek] Genotypes against Cercospora Leaf Spot Disease Incited by Cercospora canescens

Abstract

Mungbean (Vigna radiata (L.) Wilczek] is an important pulse crop valued for its high protein content, short growth duration, and soil-enriching ability through nitrogen fixation. Its productivity, however, is often constrained by Cercospora leaf spot (CLS), caused by Cercospora canescens, which produces necrotic lesions on leaves leading to defoliation, reduced photosynthesis, and yield loss. To identify resistant sources, sixty mungbean genotypes were evaluated under field conditions during the Kharif seasons of 2023 and 2024. Disease intensity was recorded using a standard rating scale, and genotypes were classified as resistant, moderately resistant, susceptible, or highly susceptible. Wide variability was observed among the accessions, with a few genotypes consistently showing low disease incidence, indicating potential resistance. Conversely, susceptible lines exhibited rapid disease development and severe leaf damage. The study highlights host plant resistance as an effective and eco-friendly strategy for CLS management and emphasizes the role of resistant genotypes in breeding durable varieties. The findings of this study underline the importance of host plant resistance as a key strategy for managing CLS disease in mungbean.