Host range, purification and some properties of rubus Chinese seed‐borne virus

Barbara, D. J.; Ashby, S. C.; Mcnamara, Damian

doi:10.1111/j.1744-7348.1985.tb01546.x

Cited by 10 publications

(1 citation statement)

References 19 publications

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“…We need to know the effects on growth and yield, the rate of spread in the field and whether a vector which might permit long distance spread is involved. The IHR has a good record for intercepting and eliminating from the UK previously undescribed viruses of hops and other perennial crops (Adams & Barbara, 1982; Barbara, Ashby & McNamara, 1985;Adams, Clark & Barbara, 1989). However, the contamination of the main propagation material of the hop industry illustrates both the difficulty of maintaining quarantine standards where a previously undescribed pathogen causing no overt symptoms is involved and the dangers, in such a situation, of maintaining all such material in a single glasshouse.…”

Section: Discussionmentioning

confidence: 99%

Assessment of UK hops for the occurrence of hop latent and hop stunt viroids

Barbara

Morton

Adams

1990

Annals of Applied Biology

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The occurrences and distributions of hop stunt (HSVd) and hop latent (HLVd) viroids were assessed by a nucleic acid hybridisation assay, using samples from 476 commercial hop plantings in the UK. These samples represented about half of the UK production.HLVd was detected in c. 17% of the samples, with infection in different cultivars ranging from 0% to 89%. This viroid was found in all cultivars sensitive to Verticillium wilt except cv. Sunshine, an old cultivar grown on only one farm in the UK. Two minor wilt-tolerant cultivars were also found to be infected at low frequencies, but the main commercially-important wilt-tolerant cultivars were all uninfected. A high proportion of the nuclear stock mother plants in the "A + " house at the Institute of Horticultural Research Dept of Hops Research, Wye College were infected. Circumstantial evidence, based on the planting dates of infected gardens, suggests that infection became established in the hop propagation system during the late 1970s and that there was a major increase in the prevalence of HLVd as a result. Whether this contamination of propagating material arose because of spread from long-standing infections or because the viroid was newly introduced into the UK, is not known.All samples were also tested for HSVd but this viroid was not detected in any UK hop material.

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Section: Discussionmentioning

confidence: 99%