Ugh. Is this RRD?
mattgrowsflowers PA z6
3 years ago
last modified: 3 years ago
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Lilyfinch z9a Murrieta Ca
3 years agomattgrowsflowers PA z6
3 years agoRelated Discussions
Is This Rose Rosette on My Reine des Violettes?
Comments (27)Thanks! for bringing these picts back up. I've been wondering about some odd growth, but believe it is herbicide damage, now. I'm bookmarking this thread. I watch as carefully as I can for odd growth, fret when I find it, sometimes cut it out and sometimes feel relief like I just did when I read this thread. I see RRD all the time in my area and occasionally in my garden. Ann Peck's website on RRD is a terrific resource. I do get a bit frustrated when I can't enlarge the photos, though. Here is a link that might be useful: Ann Peck's RRD Web Book...See MoreAm I done with roses? RRD or...
Comments (34)this spring one of my huge new dawns had rrd. i removed the plant, removed the 19 multiflora patches at the edges of my property and bought and distributed predatory mites. well another huge new dawn [i had three in all originally] has just put out fall growth full of witches brooms, so i am removing it now. it was about 30' away from the previously infected plant. there is a belinda's dream nearby with red new growth, which is small, but not really strange looking. i am keeping an eye on it, as i cant find any descriptions that mention if its new growth is supposed to be red. most of my HTs have red new foliage, and always have in the past. it is so frustrating that the biggest most vigorous established plants seem to be the hardest hit. i noticed the plants mentioned as getting RRD seemed to usually be huge climbers esp. new dawn, and shrubs, then HTs. i realized i hadnt seen minis mentioned. i searched gardenweb mini rose forum for rrd and rosette, and got zero posts about rrd. i dont know if minis are too short to get it, or mini growers are spraying miticide non-stop to kill the red spider mites, or the red spider mites are eating the eriophyid mite [which i've read can happen] ann, you posted last summer: The reasoning behind using wiltproof ties to the way that the flightless eriophyid mites get around- they are dropped by breezes when the breeze slows down. Thanks to the dissertation of Abdullah Kassar at WVU, if they land on a rose, they sense it and stay. If they land on a non-rose they try to catch the next breeze away. What we hope is happening with the wiltproof and other anti-transpirants is that they land on the wiltproof and reason "not rose" and leave. So as to how often to spray wiltproof...you'd like to keep the leaves and stems coated. Spray accordingly i bought wiltpruf to spray the new dawn i am in the process of removing, and the belindas dream i am watching. i am using it instead of hairspray. it forms a polymer coating, which i think might trap existing mites on the plants, just like the hairspray. i wouldnt give the mites that much credit in terms of intention -- it also might be that the anti-transpirants seal up the crevices they need to crawl into to not get blown about in the wind. in http://www.ars.org/pdfs/rose_rosette.pdf, it says shrub roses are most affected because their petioles provide a tight crevice, whereas HTs arent as good a host. if the mites are so prone to be blown about by the wind, maybe if the do land on a plant without good crevices,either because of the plants natural anatomy, or because wiltpruf has filled in those crevices,the mites get blown off on the next breeze before they can transmit rrd....See MoreEarly RRD?
Comments (30)Felicity, The problem with a "flip book" is that Rose Rosette doesn't have easy diagnoses. Each cultivar has different symptoms at different stages of infection. And there are differences that are seasonal as well. Some people still believe that hyperthorny is a good symptom and won't consider the possibility that it's a variable. Look at the pictures in the link Henry Kuska put from Ohio State of roses in Texas. Those roses are late stage RRD and IMO have probably had the disease for three or four years. I've been collecting symptoms for over 15 years and I still see things that are new, different and bad. Three adjectives: aberrant, excessive and unexpected...are the ones I've come up with . That unfortunately requires rose growers to know what's normal and what TO expect. For commercial plantings, do some searches on work that Dr. Mark Windham is doing with mass plantings of KnockOuts and RRD. They are showing what symptoms are and proving the symptoms are RRv with pcr tests to prove that it is the Rose Rosette virus....See MoreMore RRD Victims... do symptoms show up with heat?
Comments (50)Back to the temperature behavior. "The effect of temperature on Wheat streak mosaic virus (WSMV) replication and in planta movement was examined using a virus (WSMV-GFP) tagged with green-fluorescence protein. A rapid increase in virus accumulation was observed with increasing temperatures beginning at 15°C in Tomahawk, but this response to temperature is delayed with virus accumulation increasing beginning at 25°C in Mace. Some wheat plants that were not systemically infected at 10 and 15°C were found to be infected with the virus in regrowth shoots later at 27°C, suggesting that WSMV moves at undetectable levels under suboptimal temperatures, but rapidly begins to replicate and spread in planta under optimal temperatures. These results indicate that temperature played an important role in WSMV replication, movement, and disease development in susceptible and resistant wheat cultivars. " https://www.ars.usda.gov/research/programs-projects/project/?accnNo=424225&fy=2016 The virus WSMV (Wheat Streak Mosaic Virus) is not an emaravirus, but the above study suggests that it may be useful to add a green-fluorescence protein to Rose Rosette Virus and study its temperature behavior. https://www.google.com/?gws_rd=ssl#newwindow=1&q=green-fluorescence+protein+tag+to+virus&spf=1499315033843...See Moremad_gallica (z5 Eastern NY)
3 years agosubk3
3 years agolast modified: 3 years agoDingo2001 - Z5 Chicagoland
3 years agolast modified: 3 years agomattgrowsflowers PA z6
3 years ago
Dillybeansown (6b in the Ozarks)