Preprint- resistance to rose rosette and transmission attributes
henry_kuska
7 years ago
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henry_kuska
6 years agoPatty W. zone 5a Illinois
6 years agoRelated Discussions
Treatment for Rose Rosette
Comments (37)The following comment was made in an earlier non garden.web thread: "Joann Woy • a year ago I have observed that rose canes growing thru galvanized wire fence do not seem to be badly affected by RRV. Using that as my starting point, I drove zinc galvanized nails into the base of each major stem of my roses. I saw a substantial improvement. Roses that were not affected did not get RRV; roses that were in the earliest stages were in many cases able to fight off the RRV. I have no scientific proof this works, but it might be worth a try. Zinc is known to inhibit some viruses; I think it works in this case. I would welcome some controlled experiments testing this theory." http://www.finegardening.com/rose-rosette-disease-what-do-when-you-get-it ------------------------------------------------------------------------------ H. Kuska comment: What first came to my mind was that there are some reports that zinc helps with the cold virus. http://www.mayoclinic.org/diseases-conditions/common-cold/expert-answers/zinc-for-colds/faq-20057769 -------------------------------------------------------------------------------------- I looked for scientific papers that support the suggestion. This is one: Title: "The ameliorating effect of zinc on symptoms of phyllody virus (strawberry green-petal) in white clover" http://onlinelibrary.wiley.com/doi/10.1111/j.1744-7348.1963.tb03693.x/full ------------------------------------------------------------------------------------ AND one that is so - so. Title: "Heavy metal soil contamination delays the appearance of virus-induced symptoms on potato but favours virus accumulation" http://www.tandfonline.com/doi/abs/10.1080/03235400600627791 ----------------------------------------------------------------------- And an explanation of what may be happening. Title: "COMPLEMENTARY RESULTS OF LUMINESCENT AND TRANSMISSION ELECTRON MICROSCOPY PROVIDE STRIKING EVIDENCE OF HEAVY METAL IONS' EFFECT ON THE FORMATION OF AGGREGATES OF TOBACCO MOSAIC VIRUS VIRIONS BOTH IN VITRO AND IN VIVO." https://scholar.google.com/scholar?q=%22COMPLEMENTARY+RESULTS+OF+LUMINESCENT+AND+TRANSMISSION+ELECTRON+MICROSCOPY+PROVIDE+STRIKING+EVIDENCE+OF+HEAVY+METAL+IONS%27+EFFECT+ON+THE+FORMATION+OF+AGGREGATES+OF+TOBACCO+MOSAIC+VIRUS+VIRIONS+BOTH+IN+VITRO+AND+IN+VIVO.%22&btnG=&hl=en&as_sdt=0%2C36 H. Kuska comment: The small +2 zinc ion may be forming a dimer by combining with 2 units of virus with each contributing a +1 hydrogen ion position....See MoreRose Rosette Special Session - end of July or early August, Tampa, Fl
Comments (0)(Unfortunately I did not find the exact dates) Papers to be presented: Rose rosette disease: History, symptoms and viral pathogen. IOANNIS TZANETAKIS, University of Arkansas, Fayetteville, AR, U.S.A. Development of efficient diagnostic tools to enable rapid, easy-to-use, accurate and affordable detection of Rose rosette virus. FRANCISCO OCHOA CORONA, Oklahoma State University, Stillwater, OK, U.S.A. Current state of knowledge on mite transmission and control. RON OCHOA, USDA-ARS, Systematic Entomology Laboratory, BARC, Beltsville, MD, U.S.A. Monitoring and management of Rose rosette disease. KEVIN ONG, Texas A&M University, College Station, TX, U.S.A. Identification of sources of resistance and development of hybridization and genetic tools to move resistance into commercial cultivars. DAVID BYRNE, Texas A&M University, College Station, TX, U.S.A. See: http://www.apsnet.org/meetings/annual/scientificprogram/Pages/SpecialSessions.aspx#rose...See MoreRose rosette transmission and resistant genotypes
Comments (8)I would take this research with a grain of salt. I live in RRV Central, surrounded by hundreds of rural acres of infected multiflora, and I personally HAVE saved infected plants, while losing others. And it was NOT herbicide damage, as I use none (don't even own any) and live in the middle of a 112 acre farm where drift from someone else's use is nigh impossible. At least some of the roses I've saved through pruning have been symptom free for five years now, whereas the ones that have shown recurring symptoms ALWAYS showed it by the next growing season, but usually in the next growth spurt. It depends on how soon you catch it, where the infection starts, the age, and size of the rose. It also depends on if ONE unlucky cane was visited by mites, or if MULTIPLE sites on the rose were infected. I think some of the roses I failed to save probably had been "bitten" on more than one cane, and possibly not all showed symptoms at the time I pruned the one obvious sickly cane. Yes, the infection BECOMES systemic, I'll admit that. But the infection, by the very nature of the phloem system, can't reach the entire plant simultaneously. The mites inject the virus at specific point. Even though the plant's vascular system carries fluids throughout, it's not the same as a vascular system in an animal. In order for it to reach the other canes from an infected cane, it must travel to and through the root system, then on to the other canes. And we see from the info Henry so kindly provided, even in the study not all of the root system was found to contain the virus, so obviously the canes fed by, and springing from, the uninfected root sections stand a good chance (if not 100%) of not being infected...yet. So my recommendation is STILL to watch your roses like a hawk, prune suspicious canes to the root as soon as symptoms appear, and hope for the best. You won't save ALL of them, but you CAN save some of them. P.S> Ann has some info on the root system behaving as a "strainer" of the virus. I'm fuzzy on the details and even the terminology, but she brought it up when I was bemoaning my Golden Celebration being infected last Spring. I'll try to find the thread, and hopefully Ann will chime in soon. Edit: found it. They're called sieve cells. Here's the thread about my GC. And yes, it's now symptom free, through two more growth spurts, whereas I've lost a Molineaux infected AFTER it, but treated the same way, where symptoms recurred immediately in the next growth spurt. It was removed even while I continued to watch the GC, which is now blooming merrily in its second Fall flush. Sigh...Golden Celebration has RRD...See MoreRose rosette transmission and resistant genotypes
Comments (0)This is the paper relating to the research about which some discussion took place in this forum some months ago Link to Roses forum A quote: '...It is often that rosarians only remove symptomatic tissue with the premise that RRV is not systemic and disease could be eliminated by pruning. We used a ‘proof-of-concept’ approach using cleft-grafting, part of our resistance screening and testing root tissue where mites are unable to reach and feed on. Pruning of symptomatic areas does not eliminate the virus and should be avoided to: (i) minimize the persistence of the virus after overwintering in the root system and (ii), as a substitute of plant removal that eliminate the source of viruliferous mites for further spread...' If a read this correctly, despite the apparent syntactical-grammatical issues in (ii), the authors advise against trying to save an infected rose by pruning out canes exhibiting RRD symptoms and advise whole plant removal instead....See MoreValRose PNW Wa 8a
6 years agolast modified: 6 years agoPatty W. zone 5a Illinois
6 years agoPatty W. zone 5a Illinois
6 years agoValRose PNW Wa 8a
6 years agoValRose PNW Wa 8a
6 years agohenry_kuska
6 years agolast modified: 6 years agohenry_kuska
6 years agojadae15
6 years agoValRose PNW Wa 8a
6 years agohenry_kuska
6 years agoPatty W. zone 5a Illinois
6 years agolast modified: 6 years agohenry_kuska
6 years agohenry_kuska
6 years agoValRose PNW Wa 8a
6 years agojadae15
6 years agohenry_kuska
6 years ago
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