Int.J.Curr.Microbiol.App.Sci (2020) 9(5): 1243-1249 1243 Original Research Article https://doi.org/10.20546/ijcmas.2020.905.138 Identification for Sources of Resistance to Biotic Stresses in Mothbean [Vigna aconitifolia (Jaeq.) Marcchal] Germplasm Kartar Singh 1 *, Neelam Shekhawat 1 , Om Vir Singh 1 , Manoj Choudhary 2 and Dama Ram 3 1 ICAR-National Bureau of Plant Genetic Resources, Regional Station, Jodhpur-342003, India 2 ICAR-National Center for Integrated Pest Management, New Delhi-12, India 3 Agricultural University Jodhpur-342304, India *Corresponding author ABSTRACT Introduction Mothbean (Vigna aaconitifolia (Jacq.) Marechal) is an important pulse crop of arid and semi-arid zones of Rajasthan where erratic rainfall and dry atmosphere often lead to poor yield. The low productivity is also due to lack of suitable genotypes and cultural practices (Kumar el al. 1998). It is one of the most drought-hardy and high-temperature tolerant crop among the arid grain legumes cultivated in rainy season (kharif). Earliness along with high yield is of prime importance in drought hit areas. In India, mothbean is being cultivated over an area of 9.256 lakh hectares and production at 2.77 lakh tones International Journal of Current Microbiology and Applied Sciences ISSN: 2319-7706 Volume 9 Number 5 (2020) Journal homepage: http://www.ijcmas.com Mothbean germplasm consisting of 180 accessions were screened against yellow mosaic virus leaf crinkle virus and cercospora leaf spot under the natural field conditions to identify sources of resistance. Based on a consistent observation for 4 different crop seasons germplasm was grouped in accordance with their field reaction. IC-36522 and IC-36217 were found to be the most field promising accession against yellow mosaic virus. IC- 39786 and IC-39822 were found to be the most field promising accession against leaf crinkle virus under the resistant category. The study also revealed accession IC-16218 free from the natural incidence of cercospora leaf spot, which appeared to be promising. These field promising accessions would most certainly be useful in developing disease resistant cultivars having good agronomic traits and highly productive genetic potential. Keywords Mothbean germplasm, leaf crinkle virus, yellow mosaic virus, cercospora leaf spot Accepted: 10 April 2020 Available Online: 10 May 2020 Article Info