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#1
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third post from Ann
I'm really hoping that I won't have to (but maybe I'm being a Pollyanna about it). This was the very first rose I planted on my property (believe it or not, this is only its 3rd winter). Important roses are being lost to this disease. Sure. How are the symptoms different? Spring RRD in Atlanta on Cl. Old Blush yielded very thin, scrawny spiraling stems from every leaf axil that died rapidly, almost hypersensitive reactions to "viruses". Yours look like the chinas' symptoms spring two years ago in Staunton, VA. BTW, I only noticed this about 2 weeks ago, but I don't know how long it's been growing like this. I had an earlier instance of a stem growing through a bloom (can't remember the technical name for this) and I asked about it on the rose newsgroup and I was assured that it wasn't totally uncommon. Perhaps this was a precursor though. Maybe this should be linked as a possible early indicator. Fall in TN is when we see a lot of the buds developing at the centers of blooms (I had four coming out of the center of a Devoniensis)...it isn't a precusor to RRD, although there are some really bizarre happenings in bud development when the bud forms on a stem with full RRD: in St Louis we saw what looked like small brussel sprouts on the end of stems of a HT: three layers of asymetric sepals, NO petals, no stigma, no anthers, no receptacle. The last question is, now that we've had a hard frost, do I need to worry about a miticide to the rest of my plants at this point, or is it really too late to do any good (i.e., are the mites already killed off for the season?)? I'll be applying a dormant spray sometime in late December in any case. Dr. Abdullah Kassar in West Virginia, studying RRD and the mites in southern Indiana found that the mites live through winter, less active, but they can still be found in that colder zone in winter. Where we have lost roses to RRD this fall, we've sprayed the area with Cygon 2E to kill any mites that may have migrated within the borders from sick roses. So far (four years) we seem to be catching the infection early and haven't had rose-to-rose transmission within our garden. I did go over to RGR and (I still lurk there occassionally) and want to comment on the belief (based on info published by Iowa State) that there are relatively short paths of infection. From what we've seen in the south east, the mites can be transported by winds thirty and forty miles or more. Similar sized mites have been recovered from aerial samples of thunderstorm clouds. Even if only one mite per acre is dropped from distant infections, large rose gardens are at risk. There is NO RRD within a half mile of my garden, about 20% of the multiflora three miles up wind of my gardens has RRD (none of it was sick three years ago). This year 2% of my roses have come down with RRD, so far and the season isn't over. So, we learn as it happens. My choice is to rogue out as soon as I see it, except with irreplaceble roses. Them? I'm learning to propagate with mist and I WILL learn to graft next spring. Thanks for all of the help and I'm sharing your post with the rose newsgroup, if you don't mind. Please do share and let your neighbors know as well. Some folks in Nashville have reported it, but a lot more saw it this fall. Do look up into trees for multiflora that has climbed and is harder to see; also along highways, railroad rights-of-way and power transmission lines. Multiflora really likes to live along creek beds and at the edge of woods. Good luck and let me know how it works out. Ann |
#2
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third post from Ann
garden. I did go over to RGR and (I still lurk there occassionally) and want to comment on the belief (based on info published by Iowa State) that there are relatively short paths of infection. From what we've seen in the south east, the mites can be transported by winds thirty and forty miles or more. Similar sized mites have been recovered from aerial samples of thunderstorm clouds. Even if only one mite per acre is dropped from distant infections, large rose gardens are at risk. There is NO RRD within a half mile of my garden, about 20% of the multiflora three miles up wind of my gardens has RRD (none of it was sick three years ago). This year 2% of my roses have come down with RRD, so far and the season isn't over. I stand corrected. If the disease is this capable of spreading like this we have no hope. Hopefully multiflora will become more resistant and we can then breed those resistant geenes into other roses. -- Theo in KC Z5 |
#3
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third post from Ann
On Mon, 17 Nov 2003 17:45:53 GMT, "Theo"
wrote: garden. I did go over to RGR and (I still lurk there occassionally) and want to comment on the belief (based on info published by Iowa State) that there are relatively short paths of infection. From what we've seen in the south east, the mites can be transported by winds thirty and forty miles or more. Similar sized mites have been recovered from aerial samples of thunderstorm clouds. Even if only one mite per acre is dropped from distant infections, large rose gardens are at risk. There is NO RRD within a half mile of my garden, about 20% of the multiflora three miles up wind of my gardens has RRD (none of it was sick three years ago). This year 2% of my roses have come down with RRD, so far and the season isn't over. I stand corrected. If the disease is this capable of spreading like this we have no hope. I was thinking the same thing. ....well, not about "no hope" but more of a question of how effective eliminating multiflora in the neighborhood would be. I live in the middle of town and I don't know how much multifora, if any, is within a few miles. I guess the ticket is to spray for mites routinely, since the virus is definitely in the area. I wonder how often spraying is indicated. |
#4
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third post from Ann
Cass wrote in message ...
Dave, wasn't it your Cl. Old Blush that had the odd round puffer fish looking growths earlier this year? Robin's Pincushions? They aren't a symptom of RRD. I had an outbreak of RRD two years ago. I adopted a dig and burn policy. No repeats yet. J. Del Col |
#5
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third post from Ann
Cass wrote in message ...
Dave, wasn't it your Cl. Old Blush that had the odd round puffer fish looking growths earlier this year? Robin's Pincushions? They aren't a symptom of RRD. I had an outbreak of RRD two years ago. I adopted a dig and burn policy. No repeats yet. J. Del Col |
#6
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third post from Ann
Cass wrote in message ...
Dave, wasn't it your Cl. Old Blush that had the odd round puffer fish looking growths earlier this year? Robin's Pincushions? They aren't a symptom of RRD. I had an outbreak of RRD two years ago. I adopted a dig and burn policy. No repeats yet. J. Del Col |
#7
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third post from Ann
On Wed, 19 Nov 2003 20:01:06 -0800, Cass
wrote: Dave, wasn't it your Cl. Old Blush that had the odd round puffer fish looking growths earlier this year? No, that was my Briar Rose. Turned out it was gall wasps. In article , dave weil wrote: Sure. How are the symptoms different? Spring RRD in Atlanta on Cl. Old Blush yielded very thin, scrawny spiraling stems from every leaf axil that died rapidly, almost hypersensitive reactions to "viruses". Yours look like the chinas' symptoms spring two years ago in Staunton, VA. BTW, I only noticed this about 2 weeks ago, but I don't know how long it's been growing like this. I had an earlier instance of a stem growing through a bloom (can't remember the technical name for this) and I asked about it on the rose newsgroup and I was assured that it wasn't totally uncommon. Perhaps this was a precursor though. Maybe this should be linked as a possible early indicator. |
#8
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third post from Ann
On Wed, 19 Nov 2003 20:01:06 -0800, Cass
wrote: Dave, wasn't it your Cl. Old Blush that had the odd round puffer fish looking growths earlier this year? No, that was my Briar Rose. Turned out it was gall wasps. In article , dave weil wrote: Sure. How are the symptoms different? Spring RRD in Atlanta on Cl. Old Blush yielded very thin, scrawny spiraling stems from every leaf axil that died rapidly, almost hypersensitive reactions to "viruses". Yours look like the chinas' symptoms spring two years ago in Staunton, VA. BTW, I only noticed this about 2 weeks ago, but I don't know how long it's been growing like this. I had an earlier instance of a stem growing through a bloom (can't remember the technical name for this) and I asked about it on the rose newsgroup and I was assured that it wasn't totally uncommon. Perhaps this was a precursor though. Maybe this should be linked as a possible early indicator. |
#9
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third post from Ann
On Wed, 19 Nov 2003 20:01:06 -0800, Cass
wrote: Dave, wasn't it your Cl. Old Blush that had the odd round puffer fish looking growths earlier this year? No, that was my Briar Rose. Turned out it was gall wasps. In article , dave weil wrote: Sure. How are the symptoms different? Spring RRD in Atlanta on Cl. Old Blush yielded very thin, scrawny spiraling stems from every leaf axil that died rapidly, almost hypersensitive reactions to "viruses". Yours look like the chinas' symptoms spring two years ago in Staunton, VA. BTW, I only noticed this about 2 weeks ago, but I don't know how long it's been growing like this. I had an earlier instance of a stem growing through a bloom (can't remember the technical name for this) and I asked about it on the rose newsgroup and I was assured that it wasn't totally uncommon. Perhaps this was a precursor though. Maybe this should be linked as a possible early indicator. |
#10
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third post from Ann
Dave, wasn't it your Cl. Old Blush that had the odd round puffer fish
looking growths earlier this year? In article , dave weil wrote: Sure. How are the symptoms different? Spring RRD in Atlanta on Cl. Old Blush yielded very thin, scrawny spiraling stems from every leaf axil that died rapidly, almost hypersensitive reactions to "viruses". Yours look like the chinas' symptoms spring two years ago in Staunton, VA. BTW, I only noticed this about 2 weeks ago, but I don't know how long it's been growing like this. I had an earlier instance of a stem growing through a bloom (can't remember the technical name for this) and I asked about it on the rose newsgroup and I was assured that it wasn't totally uncommon. Perhaps this was a precursor though. Maybe this should be linked as a possible early indicator. |
#11
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third post from Ann
In article , dave weil
wrote: On Wed, 19 Nov 2003 20:01:06 -0800, Cass wrote: Dave, wasn't it your Cl. Old Blush that had the odd round puffer fish looking growths earlier this year? No, that was my Briar Rose. Turned out it was gall wasps. Thanks, Dave. I thought we felt comfortable with the ID, but I couldn't remember what it was. What's the word on Cl. Old Blush? Did you whack it? |
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