The hunt for plant viruses in South Africa : the early days

Plant viruses cause widespread disease in agriculturally impor tant crops, resulting in a reduction in both quality and quantity of produce. The introduction of intensive crop monoculture has resulted in an exponential increase in viral diseases which can cross over from wild indigenous plants. Vira...

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Published in:South African Journal of Science 2020-11, Vol.116 (11-12), p.22-29
Main Author: Rey, Chrissie
Format: Article
Language:English
Subjects:
Agricultural crops
Agricultural industry
Cassava
Corn
Crop diseases
Crops
Diagnostics
Economic impact
Farmers
Farms
Food industry
Fungal diseases
Genetic diversity
Genomes
history of viruses
Indigenous plants
Infections
Microscopy
Monoculture
Pathogens
Plant diseases
plant virus discovery
Plant viruses
Potatoes
Seeds
Serology
Small farms
Small-scale farming
Tobacco
Viral diseases
Virology
Viruses
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description Plant viruses cause widespread disease in agriculturally impor tant crops, resulting in a reduction in both quality and quantity of produce. The introduction of intensive crop monoculture has resulted in an exponential increase in viral diseases which can cross over from wild indigenous plants. Viral pathogens also can occur in mixed infections, and rapid, sensitive and reliable diagnostic methods are required to identify and characterise the viruses responsible for the field diseases. In comparison to bacterial and fungal diseases, viral diseases are more difficult to diagnose. This review covers a period (1985-2011) in the history of virus discovery in South Africa during which several plant viruses from commercial and smallscale farms were identified and characterised. Interestingly, novel viruses were discovered in three crops, namely guar and cassava grown by small-scale farmers in Mpumalanga, and in commercial tobacco. The implication of these plant diseases is potential yield loss to farmers which can affect their livelihoods, and result in severe economic loss for the food and agriculture industries. Accurate identification of the causal viral agents of these viral diseases is a prerequisite for development of effective management strategies.
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subjects Agricultural crops
Agricultural industry
Cassava
Corn
Crop diseases
Crops
Diagnostics
Economic impact
Farmers
Farms
Food industry
Fungal diseases
Genetic diversity
Genomes
history of viruses
Indigenous plants
Infections
Microscopy
Monoculture
Pathogens
Plant diseases
plant virus discovery
Plant viruses
Potatoes
Seeds
Serology
Small farms
Small-scale farming
Tobacco
Viral diseases
Virology
Viruses
title The hunt for plant viruses in South Africa : the early days
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