Articles
EPIDEMIOLOGY – ITS SCOPE AND VALUE
Article number
234_41
Pages
345 – 358
Language
Abstract
In this paper, a study on the spread of clover yellow vein virus, a non-persistent aphid-borne virus, in lupin is used to show how active field vectors may be identified provided that an appropriate model for the epidemic has been chosen.
The interpretation of gradients and clusters of infections on various scales is offered as an aid to considering the isolation a crop may need to remain substantially free of virus.
The results presented show that the virus was mostly spread by only two aphid species (M. persicae and A. craccivora) of the principal aphid species trapped.
Also, the existence of gradients of infection, and large variations in infection levels in many crops of similar age, showed that the dominant spread was within the crop.
It is suggested that data of this kind could encourage the use of virus-tested stocks for host-virus combinations that have significant reservoirs in the wild.
The interpretation of gradients and clusters of infections on various scales is offered as an aid to considering the isolation a crop may need to remain substantially free of virus.
The results presented show that the virus was mostly spread by only two aphid species (M. persicae and A. craccivora) of the principal aphid species trapped.
Also, the existence of gradients of infection, and large variations in infection levels in many crops of similar age, showed that the dominant spread was within the crop.
It is suggested that data of this kind could encourage the use of virus-tested stocks for host-virus combinations that have significant reservoirs in the wild.
Authors
R.G. Garrett
Keywords
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