What is TRV?
- TRV in potato is often known by the common name corky ringspot (CRS).
- TRV can produce necrotic rings, arcs and flecks in tubers that make them
unmarketable. - TRV rarely causes foliar symptoms.
- TRV is transmitted by stubby-root nematodes.
TRV has a very wide host range. - Stubby root nematodes also have a wide host range.
- TRV is spread in infected tubers and true seeds, infested plant debris, compost, manure and soil as well as on contaminated tools.
- Stubby root nematodes are spread in infested plant debris and soil.
- Control of TRV requires managing both the virus and its nematode vectors.
What can I do about it?
For additional details please see Tobacco Rattle Virus Management.
Avoid introducing TRV and stubby-root nematodes onto your farm.
- Do not plant symptomatic seed. Inspect seed for lesions and necrosis.
- Do not allow contaminated equipment onto your farm.
- Avoid manure and compost from contaminated sources.
- Do not plant other potentially infected crop hosts such as sugar beet and tobacco and bulb-producing ornamentals such as gladiolus, daffodil, hyacinth, and tulip.
Manage inoculum levels on your farm. Avoid spreading TRV and stubby root nematodes from infested fields to clean fields.
- Monitor nematode populations in your fields by testing soil cores.
- Practice strict on-farm sanitation protocols.
- Avoid moving contaminated soil, plant debris or manure to clean fields.
- Avoid and destroy alternative hosts.
- Manage nematodes with chemicals as part of an integrated management plan.
Plant potatoes strategically to reduce risk and the spread of disease.
- Do not plant seed potatoes in infested fields.
- Avoid planting ware potatoes in infested fields.
- Do not plant ware potatoes in highly infested fields.
- Be aware that planting any crop in TRV infested fields will increase your risk of spreading the pathogen on your farm.
Grow resistant varieties in stubby root nematode infested fields to reduce loss.