RMV infected rose: to buy or not?
braverichard (6a, North MO)
6 years ago
last modified: 6 years ago
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KarenPA_6b
6 years agoUser
6 years agoRelated Discussions
Who has Jackson & Perkins Rose with RMV?
Comments (15)The Austin own roots I got from J&P in the early to mid-2000s remained squeaky clean and performed very well (ok, I haven't looked at them in the last year since I've moved to England) Very good customer service also back then . I hear that this has now changed. Now, I do think that there is a difference in the chance that a plant is infected by RMV by the following factors: own root vs. grafted, and new vs. old variety. Dr Huey is often, but not always, infected, and older/classic/high selling varieties, especially HTs (e.g. Elina) have a very high RMV rate (I think pretty much all Elinas in the US are infected unless virus indexed). A new variety on its own roots has a much better chance of being clean, especially if sold by a reputable vendor. Usually you'll see RMV appear within 3 years if it is present, in most cases immediately or in year 2. I've never seen it appear later than after 3 years. And if your plant grows and blooms well and doesn't show any signs of RMV after several years, you can assume that it is not infected - not guilty unless proven. Andrea...See MoreRMV in Austin Roses
Comments (28)I have never bought any plants from David Austin company for my entire life, but I have bought 150+ own-roots from USA companies. Due to this past harsh winter that killed many trees in my zone 5a, I'm thinking about ordering from David Austin FOR THE FIRST TIME. Among my 150+ own-roots, there's ONLY ONE that shows RMV: It's own-root Gruss an Teplitz, which I got from Burlington Nursery in CA, back in 2012. A friend in my zone 5a informed me that her own-root Lemon Spice from Rogue Valley Roses has RMV. Rose de Rescht was the one that Al in my Chicagoland gave away to the public years ago. RMV showed up on own-root Gruss an Teplitz when there's too much rain which leaches out potassium (necessary for disease prevention). Gruss has been wimpy since day one when I first grew it in a pot back in 2012, and transferring to my clay doesn't help. I was surprised when Pakistan rosarians informed me that Gruss is THE MOST VIGOROUS as own-root in their country, growing wild at 120 F degree heat. This showed up only twice for the past 12 years that I have Gruss, so I took a picture, see below:...See MorePeach Tree, Roses, and RMV?
Comments (12)Anita, Not arguing, but questioning: Where does the figure of 18" centers come from? As I remember their growing plot where I saw the plant where it spread, it was more like 8" centers (a nursery row)? But maybe they've done more research with 18" spacings and had it happen again? Or I suppose I could be remembering their spacing wrong. But I do recall our discussing the concept that no one would ever plant roses that close in a garden, and it seems to me that someone actually might plant them 18" in a garden. Sorry, it's been a while since we had that conversation! The plants I looked at with Mike Cunningham, a number of years ago, had the first (and at least to that time, the only) case of spread in the field that had been documented. It was a row of multiflora rootstocks that had been budded, and one plant that was not purposely infected became infected. I suggested that it was very likely root grafting, and they agreed. So to test it, they painted leaves of one plant with round-up. Sure enough, the adjacent plant showed symptoms, indicating a root graft. Of course in a garden, where one would never plant roses that close, root grafting becomes exponentially less likely with distance, and is assumed never to happen in a standard rose garden. And to date, as far as I have seen (of actual evidence, not someone's claims), that plant at Davis is still the only example of demonstrated spread, in the history of the world....See MoreCan old rootstock from 4 yrs past cause RMV in my new roses?
Comments (9)Yes. It is possible. A recent paper by Golino et al discussed in detail the root to root transmission of RMV. The abstract for that paper is on line at the link below. Golino works at UC Davis with the collections of grapes, strawberries and roses that are there to provide disease free plant material. The paper on root to root came about because they were seeing RMV where it shouldn't have been. I talked to her several weeks ago and the info in the paper still stands. In addition, there are a lot of papers about other root-to-root transmission of other viruses in other plants in Rosaceae. If you have access to a university library, you should be able to get the full paper from that library. It's well worth the effort. And there is also the possibility that Chamblees might have RMV in some of their roses. RMV in my garden definitely shows in times of stress. Here is a link that might be useful: Abstract :Transmission of RMVs...See MoreLilyfinch z9a Murrieta Ca
6 years agobraverichard (6a, North MO)
6 years agoUser
6 years agobraverichard (6a, North MO)
6 years agoLilyfinch z9a Murrieta Ca
6 years agoKarenPA_6b
6 years agohenry_kuska
6 years agobraverichard (6a, North MO)
6 years agolast modified: 6 years agomzstitch
6 years agobraverichard (6a, North MO)
6 years agoUser
6 years agoKen Wilkinson
6 years agohenry_kuska
6 years agoKarenPA_6b
6 years agoKen Wilkinson
6 years ago
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