The disease intensity of Cercospora leaf spot of mungbean was recorded from 29.38 to 51.20 per cent in all surveyed areas of Rajasthan. The highest disease intensity was recorded from Nagaur (50.33) and least from Tonk (32.07%). Cercospora canescens were isolated from infected plant leaves of mungbean. In variability studies, significant morphological, cultural and pathogenic variability were observed among ten isolates of Cercospora canescens collected from Nagaur, Jaipur, Sikar, Ajmer and Tonk. CerNg1 and CerNg2 showed maximum colony diameter (90.00 and 87.00 mm) followed by isolate CerJp1 (70.00 mm). Isolate CerNg1 showed greyish whitish colony colour with convex fluffy growth and greyish smooth margin with dense centre. The minimum colony growth was observed in isolate CerTk 2 (41.00 mm). The colony growth of among ten isolates varies from 41.00 to 90.00 mm with light greyish white to dull brownish colony colour. The CerNg1 isolate showed maximum length and width of conidia 30-300

Cercospora leaf spot of mungbean, Pathogenic variability