Burned Knock-outs w/ rose rosette; when can I buy more roses?
Jessica Rieman
8 years ago
Featured Answer
Comments (10)
stillanntn6b
8 years agoRelated Discussions
Knock out rose looking ugly
Comments (14)The following was stated: "Just a note to Marty's caution: It is not just Knockout roses that can get Rose Rosette Disease (RRD). Just about any rose can get it (in fact, I'd guess ALL roses can get it). Knock Out Roses are NOT more susceptible to RRD than any other rose. " H.Kuska comment: The above may be correct, but it also may not be correct. Controlled research is needed. One way that it may not be correct is if a certain type of rose all have another virus. The first virus may make it easier for the rose rosette virus to overcome the immune system. This is a quote from research titled: "Fate of artificial microRNA-mediated resistance to plant 1 viruses in mixed infections" "However, when the plants were pre-infected with these viruses, TuMV was able to co31 infect 12-4 plants pre-infected with TRV, CaMV, and, particularly, with CMV. So, pre32 infection by another virus jeopardizes the amiRNA-mediated resistance to TuMV." http://digital.csic.es/bitstream/10261/93508/1/Martinezetal%20Phytopathology.pdf ------------------------------------------------- Is there any evidence to suggest that this occurs with successful rose rosette infections? Yes, there is: 1) Early on infected multiflora rose was found to also be infected by a cryptic virus (H.Kuska comment: which is transferred through the seeds). http://www.sipav.org/main/jpp/index.php/jpp/article/view/664/451 AND 2) Recently rose rosette infected roses were reported to also be infected by Blackberry chlorotic ringspot virus (BCRV). See the following quote: "The case of Blackberry chlorotic ringspot virus (BCRV) is of particular interest because the virus has been found to be an integral part of blackberry yellow vein disease and is widespread in rose plants affected by rose rosette disease." (H.Kuska comment: BCRV is also transferred through seeds.) http://apsjournals.apsnet.org/doi/abs/10.1094/PDIS-08-13-0866-RE...See MoreMichigan Bulb Rose infected with (confirmed in lab)Rose Rosette
Comments (11)Did Blue Girl show other symptoms of RRD? Did the canes that started red turn green? Or did other symptoms arise on that bush? Transmission within a garden seldom has ever happend in that sort a period of time. The vector mite populations don't spike until September in zone 5 conditions (this from the juried scientific literature.) When the rose arrived at your home from Michigan Bulb, was it leafed out, or was it bare of leaves, and had it been dipped in wax? You may not have heard of RRD before this happened. Most people haven't. But you might want to consider that the disease has been to the north of you in Canada, to the south of you in Pennsylvania, in every county in Ohio to the west of you. And so far, I've seen it to the east of you in the BBG in Brooklyn...in the middle of the city. The vector mites are easily carried by winds and fall infections on hybrid teas show most often in new growth the following spring. This I know from my own garden experiences and it fits what others see, as well. There is no way to say where the vector mites came from that infected the rose in your garden that is near your new rose. (And there is no lab test to identify the disease; experienced plant pathologists depend on a collection of symptoms for identification.) There is NO reason to tear up an entire rose bed. As suggested above, remove the sick rose(s). That's what we do when other diseases strike and it works for RRD. Do look upwind of your home for Rosa multiflora. You may find it along stream beds or even growing up into trees. With the disease pressure on roses to the north west and south of your state, RRD is moving into New York, even though it doesn't get talked about. Good luck. Don't panic or make yourself ill about this. I can say this because I've been dealing with RRD in my garden for ten years. I continue to grow roses. I loose a couple of plants each year to RRD. There's RRD in wild roses three miles away. It's become a fact of life, but I can enjoy the ones that live and try to mourn the ones I loose....a lot like life, really. My E-book linked below has twelve chapters about rose rosette as well as a FAQ. It's based on a lot of visiting other gardens with RRD in them as well as a lot of research. The Bibliography at the back is up to date, science wise, if you can stand to read about the intentional spread of RRD to kill multiflora....See MoreKnock-out roses are getting as common in the landscape..
Comments (30)I admit my ignorance. Why would the popularization of KO's lead to RRD? I have had KO's for many years and love them. I like odd things in my garden too, but it's good to have a few bloomers that are as carefree and prolific as some annuals. To me the original hot pink single is the winner, although I also have blushing, rainbow and double. The flowers are bigger and brighter, contributing to the desired splash of color in the landscape. BB's here in Sanford have Weeks' Home Run. It is quite different from KO in form and has an American Beauty red color. It's completely BS free and blooms constantly. I've enjoyed mine. Lots of people at the garden center at Lowes think roses should look like roses, i.e. hybrid teas, but they have no idea what is involved in getting them to thrive. I've been buying Griffith Buck's from the lady at the Raleigh farmer's market. She'll tell you which ones are disease free. Earthsong and Prairie Harvest are, totally. I have a few Austins and they all have different issues, so it's great to have troopers like KO's and these others in the mix. Anyone know any others that are disease free? I might be off topic here. claire...See Morekill poison ivy that wraps around KnockOut Rose
Comments (13)Roses can absorb RoundUp from the soil i.e. overspray is not the only way glyphosate can reach your roses. The Round-Up can leave the roots of a treated weed, pass through the soil, and be picked up by the roots of nearby rose bushes. http://link.springer.com/article/10.1007/s11104-007-9387-1# AND http://www.sciencedirect.com/science/article/pii/S116103010900063X Also, the glyphosate could remain bound in the soil for long time periods. "Glyphosate [(N-(phosphonomethyl)glycine)] is a widely used herbicide and it is known to compete for the same sorption sites in soil as phosphorus. Persistence and losses of glyphosate were monitored in a field with low phosphorus status and possible correlation between glyphosate and phosphorus leaching losses was studied. Glyphosate and its metabolite AMPA (aminomethyl phosphoric acid) residues in soil samples were analyzed after a single application in autumn. Twenty months after the application the residues of glyphosate and AMPA in the topsoil (0�25 cm) corresponded to 19% and 48%, respectively, of the applied amount of glyphosate, and traces of glyphosate and AMPA residues were detected in deeper soil layers (below 35 cm). These results indicate rather long persistence for glyphosate in boreal soils." http://www.springerlink.com/content/w1461w60366lk018/ Then, when you add fertilizer with P; the glyphosate could be released. "The results suggest that re-mobilization of glyphosate may represent an additional transfer pathway for glyphosate to non-target plants which is strongly influenced by soil characteristics such as P fixation potential, content of plant-available iron, pH, cation exchange capacity, sand content and soil organic matter." http://www.springerlink.com/content/t7h6601566432076/...See Morehenry_kuska
8 years agolast modified: 8 years agodiane_nj 6b/7a
8 years agoJessica Rieman
8 years agoJessica Rieman
8 years agohenry_kuska
8 years agolast modified: 8 years agostillanntn6b
8 years agojjpeace (zone 5b Canada)
8 years ago
Related Stories
GARDENING GUIDESGreat Design Plant: Knock Out Roses
As glorious as their high-maintenance kin for a fraction of the work, Knock Out roses make even beginners look like garden stars
Full StoryLANDSCAPE DESIGNMake Your Roses Even More Beautiful With These Companion Plants
Nourish your rosebushes and create a visual feast with these 7 classic and unexpected plant pairings
Full StoryGARDENING GUIDESWhat Kind of Roses Should You Grow?
Want to add the beauty of roses to your garden? Find out which ones, from old-fashioned to modern, are right for you
Full StoryGARDENING GUIDESLearn the Secret to Bigger and Better Roses
Grow beautiful roses using both ordinary and unusual soil amendments
Full StoryGARDENING GUIDES5 Favorite Yellow Roses for a Joyful Garden
Make 'cheery' the name of your garden game when you order your roses sunny side up
Full StoryWINTER GARDENINGPruning Secrets for Exquisite Roses
Encourage gorgeous blooms year after year with this time-tested advice on how to prune your rosebush in winter for health and shape
Full StoryGARDENING GUIDESRoses: Crowning Touch of Gardens
Whether you're the Miss or Mister America of gardening or take a hands-off approach, roses can be a winning addition to your landscape
Full StoryGARDENING GUIDES5 Red Roses to Stir Garden Passions
Show your devotion to color, scent and more with these regal landscape beauties
Full StorySPRING GARDENING5 Exotic Rose Colors for a Beautifully Different Garden
Give red a rest. Let these daring hues take the spotlight instead for a rose garden that turns heads
Full Story
Buford_NE_GA_7A