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Problem: Rose rosette (?virus)
Host: Wild roses (Rosa multiflora)
Description: Rose rosette is a more destructive disease than rose mosaic virus. It is a serious problem in Kansas on wild roses (Rosa multiflora) in pastures and hedges. It has also occasionally been found in domestic rose plantings.
Infection is thought to start with rapid elongation of a new shoot. The rapid shoot growth may continue for several weeks to a length of two to three feet. Following shoot elongation, a witches' broom or clustering of small branches occurs. The stems develop excessive thorniness and produce small, deformed leaves with a reddish-purple pigmentation. Stems and petioles of Rosa multiflora plants may have reddish blotches or streaks. Rose plants infected with the rose rosette virus die rapidly, usually within one to two years.
Rose rosette is thought to be caused by a viral agent, but this has not been confirmed. Transmission of the disease has been shown experimentally through grafting and is also thought to be spread by mites.
Recommendations: There is no effective control measure for
rose rosette-infected plants. In garden settings, infected plants should be removed and
destroyed.
References:
1. Rose Virus Diseases. K-State Research and Extension. Plant Pathology disease factsheet. (2/95)
2. Horst, Kenneth, ed. 1983.Compendium of Rose Diseases. pg. 28. APS Press.
Last Update: 01/23/2004
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