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Oh no! Not Evelyn too! (RRD)

Posted by msjam2 7B DFW (My Page) on
Tue, Sep 30, 14 at 20:46

I found this on Evelyn tonight. After taking out 7 roses with RRD, I don't think I can handle this anymore.

Can you help me confirm?  photo 20140930_191945_zpsc784d2ad.jpg

 photo 20140930_191901_zpsb321982d.jpg

 photo 20140930_191836_zpsdca71f23.jpg


Follow-Up Postings:

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RE: Oh no! Not Evelyn too! (RRD)

So sorry.


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RE: Oh no! Not Evelyn too! (RRD)

  • Posted by seil z6b MI (My Page) on
    Wed, Oct 1, 14 at 9:26

Sorry to say it but that is definitely RRD.


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RE: Oh no! Not Evelyn too! (RRD)

It is RRD.

There is a chance that if you cut that cane off as low as possible you can save the plant. Before someone comes on and poo poos that idea, you should know that I have saved roses in fall by doing that and that includes the David Austen rose 'Charles Austen' which has servived ten years of growing after the removal of the cane which had the same sort of out at the end growth as yours.

No guarantees, but it's worth a try.


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RE: Oh no! Not Evelyn too! (RRD)

I've got the same thing, msjam, this growth is showing up on a bunch of roses, and am just sick over it. Previous to this year I had one case.

Thanks, Ann, I will definitely try to cut back canes, it's sure worth a try!


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RE: Oh no! Not Evelyn too! (RRD)

I also cut off a can that was showing RRD on the end of the cane and have not seen any more RRD symptoms for 2 years.


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RE: Oh no! Not Evelyn too! (RRD)

When Maggie first showed symptoms of RRD, I did cut the infected canes off. But for some reason, 6 others got it too. It is so odd.


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RE: Oh no! Not Evelyn too! (RRD)

  • Posted by seil z6b MI (My Page) on
    Thu, Oct 2, 14 at 9:17

They may have already been infected and just not showing symptoms yet when you caught it on Maggie. I would try the cane removal and hope for the best. If symptoms return remove it immediately.


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RE: Oh no! Not Evelyn too! (RRD)

Going back and looking at the photos, especially the first one, take a look at the sepal just to the right of the white petal. That's not a leaf, that's what should have been a petal and 10 % the size of that thing. Asymmetric as all get out. Possibly the ugliest overgrown sepal I've ever seen (and I have, sadly, seen a lot.)

Worth saving just because it's such a horrible example.


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RE: Oh no! Not Evelyn too! (RRD)

I am reasonably sure I've had the starts of RRD here. I removed my entire William Allen Richardson and cut off a couple of canes of Cornelia and Ascot. I am totally paranoid now when I see red growth in the garden…Grrrr….
Does anyone know how long the "incubation" time is from time of infestation to signs of illness?
Susan


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RE: Oh no! Not Evelyn too! (RRD)

Susan,
The one "in the field" happening that I know of was here in Knoxville.
Healthy roses moved into the front of a Lowe's 1 May for their grand opening. RRD in the field about 2/10 of a mile upwind of Lowe's.

By the end of the first week of June, there were at least twelve rose bushes with RRD there. I talked to the garden mgr and then the store mgr and got them tossed in the trash truck.

Then the state checked out the greenhouse that had grown those roses from bareroots to near bloom in pots. They found no RRD in the greenhouses, nor was there any in fields anywhere close to those greehouses.

Based on that, five weeks to really ugly growth in modern roses.

Some lab studies have taken as much as six months for the disease to show symptoms after inoculation/bud graft transmission.

But, IMO, in optimum growth conditions, that one month is pretty firm. Now if a rose is going into slowed growth in fall, often nothing will show until the following spring on HTs (what I've seen in my garden), but I think this is a function of internal physiology of the different classes of roses.


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RE: Oh no! Not Evelyn too! (RRD)

I don't think it's RRD, there are no funky thorns.....


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RE: Oh no! Not Evelyn too! (RRD)

Summerseve,
You are wrong. Not all roses have the same symptoms. On a specific rose, symptoms vary with stages of the disease.
When someone says that X is the symptom of RRD, it just means that they have no extensive experience with the disease.

When you proclaim that something isn't a contageous and lethal disease, you need to be really careful that you know your subject and that your answer does no harm.


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RE: Oh no! Not Evelyn too! (RRD)

I checked all over Evelyn tonight and she seems to be ok, all canes look normal. I will give her a chance, she's too pretty to be shovel pruned.


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RE: Oh no! Not Evelyn too! (RRD)

So sorry to hear that you have had so many infected roses. Heartbreaking! I had my first case a couple of months ago, and unfortunately, think I may have my second one now. Like Susan, even healthy growth looks suspect to me now...I'm freaked out by all new growth. This is scary stuff!
Ann, This is probably a stupid question, but from msjam's pictures, it doesn't look like Evelyn is normally a thorny rose...I'm assuming a rose that is normally thornless or nearly so would not have the ability to show "excessive thorniness" as a RRD symptom?


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RE: Oh no! Not Evelyn too! (RRD)

I grew Evelyn for three or four years (lost her to crown gall) and I remember some thorns.
I wish we knew more about thorns and why they form. There are some polys in my garden that have lots of thorns on stems, and then the stems that come from them have only a very, very few. I wonder if there is a switch of some sort in the meristem that makes a determination based on temperature, sunlight or nutrients.

I've done some searches in plant literature that have left me feeling as if I'm the only person who ever wondered about thorns. The interest is in growing roses without thorns/prickles genetically, not in the why.

Pat,, it's not a stupid question. It's just we haven't watched the disease enough to know.


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RE: Oh no! Not Evelyn too! (RRD)

Thanks for the response on thorns, Ann! I have quite a few "thornless" roses, so I have wondered what to look for on them. Abnormally red growth and excessive thorns were always what I thought of as tell tale signs. My first RRD case this summer didn't have the red coloring, but definitely had the excessive thorniness...but was a thorny rose to start with. Guess it's best to just watch for anything weird & ugly on all types of roses until more is known.


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RE: Oh no! Not Evelyn too! (RRD)

Thanks anntn6b. I'd better check on all my roses tomorrow.


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RE: Oh no! Not Evelyn too! (RRD)

Definitely appears to be RRD.
The stems are pushing growth from every bud of that leafy portion, and it shows a bit of gigantism too (look how thick it is vs. point of origin.) I lost my Cardinal de Richelieu in 2004 here from RRD.
Terrible, terrible witches broom and REDDISH, sappy, abnormal growth.

So sorry.

Steven


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