~ 461 ~ Journal of Entomology and Zoology Studies 2019; 7(4): 461-463 E-ISSN: 2320-7078 P-ISSN: 2349-6800 JEZS 2019; 7(4): 461-463 © 2019 JEZS Received: 17-05-2019 Accepted: 19-06-2019 Sahaja Deva Subject Matter Specialist (Crop Production), Krishi Vigyan Kendra, Darsi, Prakasam, Andhra Pradesh, India GMV Prasada Rao Programme Coordinator, Krishi Vigyan Kendra, Darsi, Prakasam, Andhra Pradesh, India Ch. Varaprasada Rao Senior Scientist, DAATTC, Darsi, Prakasam, Andhra Pradesh, India P Vinayalakshmi Ph.D. Scholar, Bapatla, Andhra Pradesh Correspondence Sahaja Deva Subject Matter Specialist (Crop Production), Krishi Vigyan Kendra, Darsi, Prakasam, Andhra Pradesh, India Demonstration of yellow mosaic virus resistant varieties of black gram in Prakasam district of Andhra Pradesh Sahaja Deva, GMV Prasada Rao, Ch. Varaprasada Rao and P Vinayalakshmi Abstract Yellow Mosaic Virus is the major problem in pulses in prakasam district which leads to major yield reduction. A new variety of black gram tolerant to yellow mosaic virus was introduced and demonstrated in the Prakasam district. Krishi Vigyan Kendra, Darsi, assessed the performance of yellow mosaic virus resistant variety TBG 104 over yellow mosaic virus susceptible variety LBG 752 in cluster Front Line Demonstrations s in 25 acres each from 2016-17 to 2018-19. TBG 104 have shown advantage over LBG 752 in terms of yield and C: B ratio. Average yield of TBG 104 was 11.9 q ha -1 with C: B ratio of 1:1.7. Whereas, LBG 752 recorded yield of 11.0 q ha -1 with C: B ratio of 1:1.4. Keywords: Black gram, yellow mosaic virus, yield, economics Introduction Black gram, Vigna mungo (L.) Hepper, is the fourth important short duration pulse crop grown in India due to its nutritional value, as it contains high level of protein (25g/100g). In India, black gram production and consumption is highest in the world. In Andhra Pradesh, during 2017-18 black gram was grown in an area of 5 lakh ha with production of 3.29 lakh tonnes and productivity of 657 kg/ha (Indiastat.com) [2] . In prakasam district during 2017-18 black gram was grown in an area of 20.1 th.ha with production of 7.3 th.t and productivity of 362.2 kg/ha. Low productivity of black gram (0.425 ton ha -1 ) in India can be attributed to biotic stresses including viruses which causes yellow mosaic virus. Yellow Mosaic Virus is a major disease observed in pulses during recent years. Yellow mosaic virus is the most destructive disease during all seasons. It results in heavy crop loss from 50 to 70 per cent, especially if the disease occurs in the early stages of crop growth. Black gram is subjected to attack by as many as 64 species of insect pests (Lal, 1987) [4] . Plant viral diseases cause serious economic losses in many pulse crops by reducing seed yield and quality (Schreinemaher et al., 2015) [5] . Plant viral diseases cause serious economic losses in many pulse crops by reducing seed yield and quality. Among the various viral diseases, the yellow mosaic disease caused by Mungbean yellow mosaic virus (MYMV) is the most serious disease and major bottle neck for the production of blackgram. This disease is popularly known as “Yellow plague of kharif pulses” [1] . As the disease spread through vectors and this virus survives in the weed host and other legume crops there was increase in cost of cultivation towards the plant protection chemicals. To manage this, generally farmers use huge amount of pesticides indiscriminately without any proper diagnosis which results into development of resistance and resurgence of the pests as well as environment pollution. The potential solution is to identify the tolerant varieties of yellow mosaic virus. Therefore there is a need to introduce yellow mosaic virus resistant varieties in black gram. In order to overcome these problems YMV resistant variety of black gram was introduced in prakasam district under cluster front line demonstrations. Materials and Methods The present demonstration on Yellow mosaic virus resistant varieties was conducted during Kharif season at polavaram, mundlamuru mandal during 2016-17, veligandla, veligandla mandal during 2017-18, gavinivaripalem, chirala mandal during 2018-19. In this demonstration 25 farmers were selected during each year under cluster front line demonstration and demonstration was conducted in 10 ha during each year.