SPIRANTHES MOSAIC VIRUS 3

Publication Date
Thu, 23 May 2013, 00:00
Last Updated
May 26, 2013, 9:01 a.m.
Report Number
GBR-32/2
Country
United Kingdom
Pest Id
Spiranthes mosaic virus 3 - (SPMV30)
Report Status
Final
Hosts
Phlox plants
Pest Status
  • Present: under eradication
Geographical Distribution
Findings involve one propagator and the garden centre supplied by them
Summary

The Phlox paniculata plants showing symptoms were discovered at a garden centre. They were vegetatively propagated from mother plants at a UK nursery, which are thought to have been obtained 4 years ago from another EU country. It seems unlikely that the virus would have remained latent within the mother plants at the propagator nursery without symptoms for such long period, so other sources of the virus are being considered. Plants showed some mottling and the lower epidermis was delaminated from the leaf. SpMV3 is a potyvirus and is presumed to be spread non-persistently by aphids. It is possible that aphids could spread this virus to other Phlox sp. as well as Spiranthes ceruna. All symptomatic plants have been destroyed and other lots at the same premises have been treated with insecticides to kill any possible aphid vectors. The plants will be held under statutory Notice to monitor for signs and symptoms of disease. Individual samples will be collected from both first and second generation mother plants being maintained by the propagating nursery and will be tested for the presence of the virus. Investigations will be carried out to trace any other Phlox sp. that may have been sent by the propagating nursery to other garden centres to ensure they are disease free.

Danger
First finding in UK, only previous reports are from USA
Contact for info
Richard McIntosh Defra Plant Health UK [email protected]
Report files
Website
Issue keywords
Organisms, status/role Pest reporting
Commodity keywords
Live plants incl. their roots, cuttings and slips; mushroom spawn (excl. bulbs, tubers, tuberous roots, corms, crowns and rhizomes, and chicory plants and roots)

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