Rose Rosette Disease

— Written By and last updated by
en Español / em Português

El inglés es el idioma de control de esta página. En la medida en que haya algún conflicto entre la traducción al inglés y la traducción, el inglés prevalece.

Al hacer clic en el enlace de traducción se activa un servicio de traducción gratuito para convertir la página al español. Al igual que con cualquier traducción por Internet, la conversión no es sensible al contexto y puede que no traduzca el texto en su significado original. NC State Extension no garantiza la exactitud del texto traducido. Por favor, tenga en cuenta que algunas aplicaciones y/o servicios pueden no funcionar como se espera cuando se traducen.


Inglês é o idioma de controle desta página. Na medida que haja algum conflito entre o texto original em Inglês e a tradução, o Inglês prevalece.

Ao clicar no link de tradução, um serviço gratuito de tradução será ativado para converter a página para o Português. Como em qualquer tradução pela internet, a conversão não é sensivel ao contexto e pode não ocorrer a tradução para o significado orginal. O serviço de Extensão da Carolina do Norte (NC State Extension) não garante a exatidão do texto traduzido. Por favor, observe que algumas funções ou serviços podem não funcionar como esperado após a tradução.


English is the controlling language of this page. To the extent there is any conflict between the English text and the translation, English controls.

Clicking on the translation link activates a free translation service to convert the page to Spanish. As with any Internet translation, the conversion is not context-sensitive and may not translate the text to its original meaning. NC State Extension does not guarantee the accuracy of the translated text. Please note that some applications and/or services may not function as expected when translated.

Collapse ▲

Rose rosette is a viral disease that has been increasingly common on many rose species and cultivars in North America. The disease causes growth distortions, resulting in a range symptoms that may include: rapid shoot elongation, ‘witches broom’ growth pattern (tight clustering of leaves and small stems around a parent stem), deformed leaves deep red in color, malformed flowers, canes that produce no flowers, unusually thick or succulent stems, and lack of winter hardiness. The most recognizable symptom is a proliferation of thorns, found on stems in much greater density than normal. These numerous thorns are often succulent and more pliable than normal thorns, and may appear red or green in color.

The disease is caused by a virus that is spread by tiny arachnids called eriophyid mites which, at 1/200th of an inch long, are tiny even by mite standards, and are light enough to be carried from plant to plant by the wind. The mites feed off plant sap in young stems, transmitting viral particles in the process. Humans can alsoRose Rosetta Disease transmit the virus by contaminated pruners and through grafting infected material. The virus moves through the entire plant quickly, so pruning off only the symptomatic tissue will not help. Like all viral infections, there is no cure for infected plants, and most roses will succumb to the disease in several years.

In principle, controlling the vector could inhibit the spread of the disease, but there are currently no effective miticide or insecticide treatments for controlling eriophyid mites: application of insecticides would only harm beneficial insects. If you observe symptoms of rose rosette disease, the best control strategy is simply to remove the infected plant(s) from your yard. Bag the infected plants and dispose of them, or burn them if burning is permitted in your area. As long as infected roses remain in your landscape, they can be a source of inoculum for future infections.

The wild multiflora rose (Rosa multiflora), which was brought in from Japan for breeding ornamental rose rootstocks, is particularly sensitive to rose rosette disease. Muiltflora rose was once widely planted for erosion control and for hedging, but has now become invasive in much of North America and may be a source of inoculum for the rose rosette virus. Multiflora rose can be removed from your property, but make sure it is not the similar, native Carolina rose (Rosa carolina), which is an important pollen and food source for native wildlife.

All ornamental roses are susceptible to rose rosette disease, including the popular Knock Out® cultivars. Research in breeding resistant varieties is ongoing. Fortunately, the virus only seems to infect ornamental roses, so you may plant many other shrub species in your former rose bed should you have an infestation.

If you think some of your roses have rose rosette disease, send a photo to your local N.C. Cooperative Extension horticulture agent. For more information, visit the Rose Rosette website.