RRD
BethC in 8a Forney, TX
8 years ago
Featured Answer
Sort by:Oldest
Comments (18)
Patty W. zone 5a Illinois
8 years agoPoorbutroserich Susan Nashville
8 years agoRelated Discussions
Observations on RRD in my garden.
Comments (12)Hi Austin, Over the years one or two of my most sheltered roses (in the backyard, behind a tall board on board fence, in back of other roses) got RRD while some far more exposed roses did not. I’ve read that fences and windscreens can help deter RRD somewhat, but that’s not been my personal experience…I’ll stick with FORBID. I do think that removing an infected rose will very likely prevent its neighbors from getting infected. That’s worked out quite well....See MoreDifference between RRD and vigorous healthy growth?
Comments (3)The older growth looks rather sparse of thorn while the new growing stems look rather heavy in thorns. This bothers me. I would just continue to monitor the bush carefully, and if hyperthorniness increases, and other RRV symptoms occur like contracted internode distances (rosette type growth), deformed, undersized leaves, and discolored growth, you may have a case of RRV. At that point you know what to do next. Moses...See MoreNew RRD research paper!
Comments (12)Thank you very much for sharing this, Roseseek! We don't have RRD in Europe (knock on wood!) but I am very interested in the research about it. It's good to read that they were able to identify resistant varieties that offer options for people in high RRD areas and pathways for future breeding. I do wish the paper had shown a bit more detail in the results for the resistant group, by listing those with low symptoms and those with no symptoms at all separately....See Morepotential RRD? Witch broom cane looks very different from rest of ++
Comments (6)What variety is it? Some roses are just naturally prone to both vigorous new canes and red new growth. Roses that have just this year really settled in will also throw growth that is more vigorous than in previous years. But I wouldn't call what you have a witch's broom. The real thing is nasty, and slightly creepy. We're talking clusters of sprouts and buds, sometimes as many as 20-30, like a broom...of a witch. The rule of thumb for diagnosing RRD is for the rose to present THREE symptoms. One symptom alone, it's probably normal. Two symptoms, you watch it. Three or more symptoms, it's probably RRD. The symptoms most likely to indicate RRD: Witch's broom growth. Once you've seen the real thing, there's no doubt. Although damage from RoundUp can imitate RRD, you can learn to differentiate it. New growth (other than new canes from the base) larger in diameter than the cane or branch it springs from. This will usually have a witches broom, but not always. Mis-shapen, red new growth that does not turn green within two weeks. If the growth is red, but of normal shape...it's normal, lol. Mis-shapen sexual parts: pistils/stamens, if the buds open at all. The petals will probably be mis-shapen as well. Multiple sprouts from each eye/leaf bud. With RRD all the dormant "extra" buds tend to sprout at once. Extremely rapid growth of just one part of the rose (this does NOT include new canes coming from the base unless they exhibit at least two other symptoms). Over the last 20+ years, I've lost probably 40-50 roses to RRD. I'm not an expert (Ann is THE expert. @stillanntn6b), but I have a degree from the School of Experience...unfortunately. Ann and I live very close to each other, and we both deal with RRD as a regular part of rose gardening. I think your rose will be fine. Watch it, but I'm betting within two weeks the "problem" will resolve itself. EDIT: Oops! How could I forget about the thorns?!?! Ann just rightly reminded me about the excessive/abnormal thorns. Just adding it here in case someone doesn't read down to her post. Quoting Ann: "compare the prickles/thorns on this growth with those from last year. RRD prickles are both denser and often significantly thinner. " I would add that RRD thorns are often not only thinner, but also rubbery, instead of stiff or woody. This is not 100% of the time, but if the thorns do not harden...RRD. I should have also added her caveat about the stipules. This goes hand in hand with the over-activation of the dormant buds. Thanks, @stillanntn6b...See Morecountrygirlsc, Upstate SC
8 years agolast modified: 8 years agoPoorbutroserich Susan Nashville
8 years agosummersrhythm_z6a
8 years agolast modified: 8 years agoBuford_NE_GA_7A
8 years agoPoorbutroserich Susan Nashville
8 years agojkellydallas
8 years agoPatty W. zone 5a Illinois
8 years agoPoorbutroserich Susan Nashville
8 years agojkellydallas
8 years agodiane_nj 6b/7a
8 years agolast modified: 8 years agodublinbay z6 (KS)
8 years agohenry_kuska
8 years agobraverichard (6a, North MO)
8 years agoBethC in 8a Forney, TX
8 years agohenry_kuska
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 Story
BethC in 8a Forney, TXOriginal Author