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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)
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Date Deposited: 29 Oct 2008 00:06
Last Modified: 11 Mar 2016 05:55
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