Rose Rosette Disease (Mary Shelley)
sandandsun
10 years ago
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sandandsun
10 years agorosetom
10 years agoRelated Discussions
Earliest symptoms of Rose Rosette Disease on Cornelia
Comments (11)Zyperiris, I spent some searching time trying to find an updated map for places where RRD has been reported. The most recent map I could find was one from 2002, which shows NO reports of the disease in the entire state of North Carolina. But it can spread rapidly, apparently; someone maybe 70 miles to the west of us says that he has been dealing with the problem for _years_ now. I hope a part of that spread isn't that something intentional has been done to try to spray the invasive multiflora roses here (or anywhere, for that matter) with the infected mites. I do know that the multiflora rose is considered invasive here. (That spread-a-deadly-disease-you-can't-control approach strikes me as making about as much sense as spraying bubonic plague to kill measles.) On that 2002 map I did notice a few locations in California for RRD. It isn't impossible that it would have spread some in the west since then. I'd certainly keep a close eye on that rose if it were mine. Best wishes, Mary...See MoreRose Rosette Disease at Local Nursery
Comments (36)Buford's photos could both be herbicide damage. At present there is not a simple field test to determine if a rose has RRV or does not have RRV. Excessive thorns is thought to be a good indicator of RRV infection but lack of excessive thorns does not rule out RRV. Buford's photos do not show excessive thorns, and the one that he feels is RRV is similar to one posted for herbicide damage by Plant Pathology Department Extension Service at the University of Arkansas. http://plantpathology.uark.edu/Number5-2009.pdf From Ann Peck's web book: "There are no laboratory tests to confirm a diagnosis of RRD; graft transmission tests can confirm the disease when the recipient plant (R. multiflora) develops RRD. A lack of transmission does not prove lack of the disease, just lack of transmission. Dr. Jim Amrine (personnal communication) suggests that graft transmission tests are more often successful in spring than in other seasons. This, to me, corresponds to the time that multiflora puts on most of its new growth (when its growth isn't affected by RRD)." -------------------------------- H. Kuska comment: Until a simple lab test is developed, we simply do not know from a single field examination in some/many cases. There are too many variables: type of herbicide, concentration of herbicide, rose variety, weather, etc. to say for certain from a single observarion in all cases this plant definitely has RRV, this one definitely has herbicide damage. Here is a link that might be useful: Ann Peck's chapter Recognizing Rose Rosette...See MoreSuggestions on Replacement Climbing Rose after Rose Rosette
Comments (8)You have my sympathies with RRD! Been there. (Actually, more accurately: being there right now...) #1. I recently had to find the answer to question #1 for myself. The answer I received indicated that 99.99% of the time, one year is long enough to wait for replanting in the same spot as far as coming down with RRD again goes, because if the infected rose is going to regenerate from its infected roots, it will almost surely do so within a year. If it does regenerate from its infected roots, of course, any mites in the area would have the capability of passing the infection to the newly planted rose. You don't necessarily have to wait a year, but you are taking a greater risk if you don't wait that long. I'm going to wait a year. #2. I'm not sure about the answer to #2, except that I know the answer is unrelated to Rose Rosette Disease. The potential reason to avoid using the same hole would be a concern for Rose Replant Disease, which sometimes (or maybe even frequently) does occur in England. I don't know whether it happens on this continent or not, or if it does happen whether it happens frequently enough to worry about. If it were actually sometimes a problem here too, two years would be long enough to wait on replanting in the very same hole. But along a fence, you probably could just easily move the new hole over a bit anyway, right? #3. My Cornelia Hybrid Musk, before succumbing to RRD, liked to throw out extremly long canes that were beautifully flexible and had a zillion little stems with buds on them. So I think Cornelia would be nice on a fence, and it's as beautiful a rose as you can imagine. It's also likely to have fewer disease issues than Golden Showers for most people. (However, it appears that you were quite lucky with Golden Showers there, so maybe you might want to think "Don't fix what ain't broke!") Lots of Hybrid Musks might work. Some: Wilhelm, Prosperity, Bubble Bath, Lavender Lassie. Some other possibilities (that I don't have experience with, but have seen recommended by others): Felix Leclerc, Soaring Spirits, Goldfinch, Rosarium Uetersen (Seminole Wind), Abraham Darby. I do have (a new) Climbing Iceberg and that might work well for you, even though it can get blackspot. New Dawn is supposed to be easy to grow, though it does have more thorns than some other choices. Mortimer Sackler ought to work well, as long as you don't count on too much distance (lovely, fragrant, low thorns, healthy). I'll enclose the link to Help Me Find's website so you can search on whatever varieties you might be interested in. Best wishes, Mary Here is a link that might be useful: HelpMeFind rose search...See MoreRoses to go with Marie van Houtte?
Comments (8)Thanks all. Luxrosa, I like the look of UB. I was so stuck on another tea, I hadn't considered HP's. And I think I will have to find another spot for a Perle D'Or. Jeri, I was given a tiny plant of Maman Cochet this year. I moved it soon after it got a go on, but it seems to be surviving. I see HMF says it does well in shade too. My Botanica rose book says it is prone to balling in humid weather, so I will see how it goes. I had never heard of Niles Cochet, but it sounds wonderful, mounding and spreading, but I can't find it listed in Australia, under any of its pseudonyms. Ingrid, I think I'm replacing 2 Mrs Reynolds Hole, whose blooms don't take the heat, with 2 Mrs BR Cant....See Morejerijen
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