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Spraing

Tobacco Rattle Virus (TRV)

Pathogen

Virus

Hosts

Potato, common weeds such as field pansy, knotgrass, groundsel, chickweed and shepherd's purse can all act as a host to the tobacco rattle virus.

Symptoms

Brown arcs and blotches in the tuber flesh, but there are usually no visible marks on the skin. Plants grown from infected seed do not normally exhibit the disease, but sometimes produce several healthy stems and one stunted stem with yellow mottles, rings or lines on its leaves.

Development

The virus survives in free-living nematodes and is transmitted when they feed on tubers. The virus is not normally transferred to daughter tubers.

Favourable Factors

Light, sandy or gravelled soils in which nematodes are common, notably in North Norfolk, the Vale of York and the West Midlands.

Importance

Infected tubers are unmarketable for ware.

Control

Identification and Management of potato diseases

Find out more information on the key disease threats to your potato crop. For each disease you will find out the importance of the disease in terms of potential yield penalty, how to identify the disease in its early stages and our advice on the best control strategies.

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