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Virus diseases of Trifolium subterraneum and Vicia faba in Tasmania

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Srithongchai, W (1990) Virus diseases of Trifolium subterraneum and Vicia faba in Tasmania. PhD thesis, University of Tasmania.

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Abstract

Studies were conducted on six virus isolates recovered either from subterranean clover (Trifolium subterraneum) or broad bean (Vicia faba) infected in the field in Tasmania. Two were identified as isolates of bean yellow mosaic potyvirus (BYMV-F, BYMV-K), two as isolates of clover yellow vein potyvirus (CYW-B, CYW-D) and two as isolates of soybean dwarf luteovirus (SDV-Ap, SDV-As). These isolates were compared with respect to some of their biological and physical properties and representatives of the isolates were also studied in the field to compare their spread and effects in plots of broad bean and how that might be controlled with insecticides. The CYW isolates generally caused more severe symptoms than the BYMV isolates on those host plants that they had in common. These two groups could be distinguished on the basis of their host ranges but neither host range nor serological tests could differentiate the isolates within the same group. However isolates of the same group did differ with respect to their transmissibility by various aphid species. The differences in the efficiency with which the isolates were transmitted by various aphid species seemed to reflect differences in the helper factors encoded by them. For example Rhopalosiphum padi transmitted BYMV-F quite efficiently but it only transmitted CYW-D if it had prior access to plants infected with BYMV-F.

Item Type: Thesis (PhD)
Additional Information: Copyright the Author -The University is continuing to endeavour to trace the copyright owner(s) and in the meantime this item has been reproduced here in good faith. We would be pleased to hear from the copyright owner(s).
Date Deposited: 29 Oct 2008 00:06
Last Modified: 18 Nov 2014 03:52
URI: http://eprints.utas.edu.au/id/eprint/7909
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