MYMV transmission and control in India

Green, S.K. Book author
Kim, D.H. Book author

Shanhua, Tainan AVRDC Taiwan

1992

p.8-27

SB608.M6A7

Mungbean yellow mosaic virus (MYMV), a whitefly-transmitted geminivirus, causes diseases in a number of leguminous crops in India, but mungbean, blackgram and soybean are most seriously affected. An annual loss of over US$300 million in these three crops is incurred as a result of MYMV infection. Isolates of the virus differ in host range, in their reaction to monoclonal antibodies to other geminiviruses such as the African and Indian cassava mosaic viruses (ACMV, ICMV) and in spot hybridization with nucleic acid probes to ACMV, ICMV and a Thai isolate of MYMV. These differences, however, are not sufficient to clearly define strains (or even viruses themselves) within the MYMV complex. Ultrastructural changes in the hosts are similar to those in other whitefly-transmitted geminiviruses that have been reported. The virus also causes biochemical changes in the host, some of which differentiate resistant and susceptible varieties. Bemisia tabaci (Genn.) efficiently transmits the virus in a persistent manner but there is no multiplication of the virus in the vector. Biotypes of the vector are expected but have not been identified. Minimum temperature and minimum relative humidity are important factors to predict disease incidence under northern Indian conditions but for southern Indian conditions, maximum temperature and rainfall are the essential factors to predict disease incidence. Several chemicals, particularly systemic granular insecticides, have been found effective in controlling the disease. The disease can also be managed by biological control and cultural practices. Sources of resistance have been identified and resistant varieties of the major crops affected by the virus have been developed. Further genetic studies are required to nature of resistance to the disease, and higher and more stable resistant varieties are needed. The virus has also become serious for crops like cowpea in India following the introduction of susceptible germplasm. [AS]

Mungbean yellow mosaic disease; Proceedings of

Research > Published Articles