Vol. 7, Issue 5 (2019)
Viru-vector relationships of yellow mosaic virus and whitefly (Bemisia tabaci) in horsegram
Author(s): HS Ganesh, MR Govindappa, Ashwathanarayana DS and LN Yogesh
Abstract: The present investigations were undertaken with different aspects on virus-vector relationship for yellow mosaic disease of horsegram which includes minimum number of whiteflies required for transmission, acquisition accesses period, inoculation accesses period, persistence period of yellow mosaic virus in the vector and starvation period. Horsegram yellow mosaic virus was transmitted to healthy plants only by the whitefly, Bemisia tabaci and not through sap inoculation. Single viruliferous whitefly can able to transmit the HYMV. However, transmission efficiency was increased with increased number of whiteflies. More than ten whiteflies were required for 100 per cent transmission of Horse gram yellow mosaic virus with common acquisition and inoculation access periods of 12 h. Similarly minimum period of 1 h was necessary for whitefly to acquire the virus and transmit the disease to an extent of 3.33 per cent and an AAP of at least 12 h was required for 100 per cent transmission by whiteflies. A minimum IAP of 1 h was recorded to achieve 6.66 per cent transmission efficiency and IAP of 12 h resulted in 96.6 per cent transmission. When healthy whiteflies provided 1 h pre acquisition starvation period resulted in 20 per cent transmission. As the pre acquisition starvation period increases, the extent of virus transmission was also increased and obtained cent per cent transmission at 12 h. As per the results of persistence of HYMV in the vector whitefly B. tabaci, it was found that, the virus could persist in B. tabaci for nine days and gradually decreased over a period of time after acquisition. This showed that, the virus is whitefly borne and transmit in persistent manner.
Pages: 2845-2849 | 182 Views 38 Downloads
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How to cite this article:
HS Ganesh, MR Govindappa, Ashwathanarayana DS, LN Yogesh. Viru-vector relationships of yellow mosaic virus and whitefly (Bemisia tabaci) in horsegram. Int J Chem Stud 2019;7(5):2845-2849.
