Roses forum: Rosette Disease???

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Name: Margie
NY (Zone 7a)
Garden Ideas: Level 1 Celebrating Gardening: 2015
MargieNY
Aug 15, 2019 8:46 PM CST
Thank you Carol for bringing this to our attention. What a shame.
It's important to familiarize yourself with the symptoms of RRD and make others aware.


Observe, observe, observe
Zone 9, Sunset Zone 9 (Zone 9b)
Roses
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Mustbnuts
Aug 16, 2019 3:46 AM CST
I am curious if RRD is here. In speaking with some breeders a couple of years ago, it was not here yet, but the myth of it being here was strong. Hmmm, always learning something new!
(Zone 5b)
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Tisha
Aug 16, 2019 6:42 AM CST
Up till now I haven't heard of replant disease here in US.
Years ago the first book on roses I read mentioned it. At that time the British author also mentioned a chemical was sometimes used. She stated that most of the time soil replacement was successful.
Brits have been dealing with it for years.
Simple on a Schedule
Name: Lynda Horn
Arkansas (Zone 7b)
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gardenfish
Aug 19, 2019 1:55 AM CST
Hello, I am posting a pic... concerned about rdd. Rdd has shown up in our area, I am sending in a leaf sample today for analysis, but does anyone think that is what this is? We have very strange weather this year. Oh, yes, there is Black spot on this rose, it is chronic here, but I have never seen growth like this before on any of my roses. Thank You!
Thumb of 2019-08-19/gardenfish/bbb035
Thumb of 2019-08-19/gardenfish/a31da7

We do not own the earth...we borrow it from our children
Name: Seth n Sam .....
W.V. (Zone 6a)
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Weluvroses
Aug 19, 2019 5:48 AM CST
gardenfish said:Hello, I am posting a pic... concerned about rdd. Rdd has shown up in our area, I am sending in a leaf sample today for analysis, but does anyone think that is what this is? We have very strange weather this year. Oh, yes, there is Black spot on this rose, it is chronic here, but I have never seen growth like this before on any of my roses. Thank You!
Thumb of 2019-08-19/gardenfish/bbb035
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To me minus the black spot. It looks like new healthy growth. And the leaf taco-ing. Our Blazed Improved gets really super red like that on new growth. But it changes to green within a couple days as it continues to grow.
Name: Lynda Horn
Arkansas (Zone 7b)
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gardenfish
Aug 19, 2019 5:54 AM CST
Wow, what a relief! I will monitor it very close to see if it changes shape or size. Leaf-tacoing...I love that term, that is exactly what it looks like Rolling on the floor laughing . (I eat a lot of tacos). To @Weluvroses, a BIG Hurray!
We do not own the earth...we borrow it from our children
SW Ohio River Valley (Zone 6b)
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vaporvac
Aug 19, 2019 9:47 AM CST
Do you see any other things, such as hyper-thorniness or rubbery thorns?? Your stems look green so that's a good sign.
Name: Lynda Horn
Arkansas (Zone 7b)
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gardenfish
Aug 19, 2019 10:02 AM CST
No, I didn't.
We do not own the earth...we borrow it from our children
Name: Christopher
New Brunswick, NJ, USA (Zone 7a)
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AquaEyes
Aug 19, 2019 7:35 PM CST
@Weluvroses, I think your Knockout has RRD. I've come to see it on several different roses, and what I see in your pics is how I've seen it present on some Knockouts in the early stages. In the off-chance that it's not RRD, it's still not something I'd keep growing in the garden. Best bet is to remove it. Put a garbage bag over it, saw it off at the base, then dig up the roots and throw it in the bag. Tie it up and send it out with the garbage.

Sorry.

:-(

~Christopher
Name: Porkpal
Richmond, TX
Charter ATP Member Dog Lover Cat Lover Keeper of Poultry Keeps Horses I was one of the first 300 contributors to the plant database!
Garden Ideas: Level 2 Plant Identifier Raises cows Roses Farmer Celebrating Gardening: 2015
porkpal
Aug 19, 2019 8:56 PM CST
Seth, Christopher is a very knowledgeable member of the forum, as you may already realize, and I feel it's well worth heeding his advice.
Porkpal
SW Ohio River Valley (Zone 6b)
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vaporvac
Aug 19, 2019 10:10 PM CST
I guess I should have read this post more closely as I thought he'd already removed that bush. Those pictures on the second page are clearly rrd. I agree with Christopher; it needs to be taken out.
[Last edited by vaporvac - Aug 20, 2019 12:00 AM (+)]
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Name: Rosemary
Sacramento, CA (Zone 9b)
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reh0622
Aug 20, 2019 12:06 AM CST
If there's no hyper-thorniness it's not RRD, I was told by a knowledgeable rosarian. A lot of new growth is red at first.
Name: Christopher
New Brunswick, NJ, USA (Zone 7a)
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AquaEyes
Aug 20, 2019 3:29 AM CST
The "hyper-thorniness" doesn't always present. What is highly suggestive of RRD is that all the growth buds are stimulated -- three at each node, and every node along the stem -- and what's coming out is abnormal-looking. It's not just that it's red. If you imagine the pictures are in black-and-white, it still looks wrong.

:-(

~Christopher
Zone 9, Sunset Zone 9 (Zone 9b)
Roses
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Mustbnuts
Aug 20, 2019 6:41 AM CST
Just, so we know, we have been talking about two different diseases (with the same initials) here on this post. RRD--rose rosette disease and RRD--rose replant disease. My earlier post refers to rose replant disease, not rose rosette disease which we do unfortunately, have here.

Gardenfish, I would recommend taking a cutting of that plant you suspect as having rose rosette disease (the odd looking part) to your local ag commissioner and have it verified as rose rosette disease. Most are keeping track of the disease and they would appreciate the information if it is rose rosette disease.
Name: Rosemary
Sacramento, CA (Zone 9b)
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reh0622
Aug 20, 2019 9:52 AM CST
I meant in my post above that normal, new growth is more often than not, red,

Same initials for two different disease states is confusing!

Mustbenuts, RRD has been found in a couple places in CA, most recently in Sacramento, a couple of months ago. All the bushes in a front yard planting. Also two or so years ago in the Bakersfield area, in two different places about 10 mi. apart if I remember right. The thought is that the understock had been affected before the roses were marketed. I read about those on a UC Davis website, and the other on a Univ. of Texas website that has RRD information and does testing.
SW Ohio River Valley (Zone 6b)
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vaporvac
Aug 20, 2019 10:38 AM CST
Not only that, MbN, but there are also two posters with issues. I am referring to Seth's plant as I believe is Christopher.
Zone 9, Sunset Zone 9 (Zone 9b)
Roses
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Mustbnuts
Aug 20, 2019 11:57 AM CST
Rosemary, I see the latest infestation in Sacramento County in April of this year (at least that is when it was identified). The home owner stated she had noticed this on her roses for the past couple of years before she took them in, to be tested. There have been samples that have tested positive in Kern County in a residential area and then also commercially at the Weeks Roses facility outside Wasco (just passed by there yesterday!). There was also a confirmed report in Tulare County in 2018 as well, unfortunately.

What was nice, on the RRD website, was they gave instructions for how to bring in the samples for testing.

Rose Rosette Disease:

Sampling and Submission of Samples

Obtain a gallon size zip top bag and either a second gallon size zip top bag or a trash bag. You will also need gloves and a set of hand pruners.

Remove symptomatic shoots and quickly place into the bag. If no flowers are present on the shoots, collect a few partially to fully open blooms or spent blooms from the plant. The mite that transmits RRD is more likely to be found on the flowers rather than the leaves. A good sample consists of multiple shoots that will fill the gallon size bag.

We can also test non-woody stems, blooms, buds, hips, and roots. So any part of the plant that you can send in along with symptomatic leaves and shoots allows for us to have good material for testing.

Seal the bag. DO NOT add any water or damp paper towels to the bag.

Insert the first bag into a second plastic bag of the same size or you can use a larger bag such as a trash bag.

Seal or tie the second bag closed.

If you are not mailing right away, place the sample bag in the refrigerator.

Place the rose sample(s) into a sturdy box and address to diagnostic lab.

In most cases, sample testing takes three days following receipt of the package. In some cases, testing may be delayed due to high volume or if lab staff are traveling. Roses will be examined microscopically for the presence of eriophyid mites.

Folks in the community bring in samples to us at the Univ of Ca., Center (and we ask them to bring in samples) of plant material that they don't know why it is growing in a certain manner or they want to have the bugs on the plant material identified. One sample I grabbed from the fridge the other day was gross! Lemons full of mold, half eaten by rats, black with decay, filled with citrus leaf miner, etc. I am going to recommend that they supply us with some gloves to wear when handling the samples. Unfortunately, I am waiting for the day when RRD is brought in to us to be identified.
Name: Seth n Sam .....
W.V. (Zone 6a)
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Weluvroses
Aug 21, 2019 4:27 AM CST
I havent pulled it yet. I'll take some pics when the sun comes up here in a few. I also posted my Molineux in this thread that has RMV I should've made a new thread for it. But the original post is a knockout rose. It had one normal looking flower. And the rest have been super deformed. And still not the same color. Not even remotely close.
Name: Lynda Horn
Arkansas (Zone 7b)
Be kind to all living things
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gardenfish
Aug 21, 2019 6:29 AM CST
Thanks to all for your expert advise. I decided to hold off a few days and observe the plant. I am happy to report that the shoots shot up, the leaves turned a healthy green (well as healthy as it can be with black spot that blasted disease), and the buds broke out in healthy flowers. We are having unusual extreme heat here now, all my plants are suffering, some more than others. Hurray! Smiling Now if someone would just come up with a cure for black spot.... Grumbling
We do not own the earth...we borrow it from our children
Name: Porkpal
Richmond, TX
Charter ATP Member Dog Lover Cat Lover Keeper of Poultry Keeps Horses I was one of the first 300 contributors to the plant database!
Garden Ideas: Level 2 Plant Identifier Raises cows Roses Farmer Celebrating Gardening: 2015
porkpal
Aug 21, 2019 11:09 AM CST
The heat, if high enough, will deter the black spot.
Porkpal

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