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May 13, 2018 3:04 PM CST
Thread OP
Petaluma, CA (Zone 9b)
I previously asked if my roses had RRD... (those didn't, thankfully)
However this growth looks suspiciously like the picture I've been seeing on the net. And I'm hoping against hope that it's not...

Someone had mentioned about stems being thicker almost succulent like and these certainly are.

Thumb of 2018-05-13/KaySidhu/625bcd

Thumb of 2018-05-13/KaySidhu/ceda87

Thumb of 2018-05-13/KaySidhu/d11456

Also multiple shoots from one eye..

Thumb of 2018-05-13/KaySidhu/79e77c

Excessively thorny?

Thumb of 2018-05-13/KaySidhu/6b470a
Thumb of 2018-05-13/KaySidhu/363776

Apologies for the barrage of photos!
Last edited by KaySidhu May 13, 2018 3:43 PM Icon for preview
Avatar for MargieNY
May 13, 2018 4:06 PM CST
Name: Margie
NY (Zone 7a)
Celebrating Gardening: 2015 Photo Contest Winner 2020 Garden Ideas: Level 1
Read this article:

"Ong said his role on the project is also to educate the public about the disease, which will help monitor its location, so his team created a website,, as a clearinghouse for information.

"The website also is a portal so that people can take pictures and submit them into the database. A verifier on the team looks at the photo to determine whether the plant depicted has rose rosette," Ong said.

The site is designed for mobile phones or tablets so a person can easily take a picture while looking at the plant, he said.

"When a picture is submitted, the site captures the location and a verifier is notified to make a decision about the image," Ong explained. "Yes, it is rose rosette; no, it is not rose rosette; or we are not sure or we would like to get more information or a sample. Those are the three possible answers."

Verifiers can ask for a physical sample for confirmation, if necessary, he said. All images are maintained in the online database for future reference by variety to help researchers and the public document which have been proven susceptible.

To help people learn what to look for, Ong published a series of factsheets available at Several other affected states also have information linked on the rose rosette website."
Observe, observe, observe
We are fortunate to "see" & appreciate nature in ways others are blind.
May 13, 2018 4:54 PM CST
Name: Zuzu
Northern California (Zone 9a)
Region: Ukraine Charter ATP Member Region: California Cat Lover Roses Clematis
Irises Celebrating Gardening: 2015 Plant Identifier Garden Sages Plant Database Moderator Garden Ideas: Master Level
I don't see anything suspicious in these photos, Kay.
May 13, 2018 5:01 PM CST
Thread OP
Petaluma, CA (Zone 9b)
Thank you, both!

I will upload the pictures to the website. I also wrote to a researcher working with these disease at OSU... if I hear back from either of them, I'll update here.
Avatar for NyxOfTheFallen
May 14, 2018 9:17 AM CST
Name: Nyx
Washington (Zone 8a)
Just looks like happy new growth!
May 15, 2018 3:10 PM CST
Thread OP
Petaluma, CA (Zone 9b)
Heard back from the Researcher at Oklahoma State for these above pictures. I'm sharing her response below (with permission) for others who may be concerned including her advice on the miticides application:

{At this time, the growth on the roses appears normal and healthy. The new growth on roses often has a red color and the leaves may appear abnormal until they fully develop. The number of prickles (thorns) often varies from plant to plant, so I wouldn't rely on this alone. I do not think you have anything to worry about at this time.

One suggestion when you see something unusual is to tie a small flag on that section of the plant. Take a photograph once a week and see if what you thought might be unusual develops normally. If you are extremely concerned, you may want to apply a miticide every two weeks in case the mites carrying the virus should land on your plants. Good miticides for home gardeners are a horticultural oil (active ingredient may be neem oil, mineral oil, etc) or a product with the active ingredient of bifenthrin. These products are most likely available at home garden centers in your area.

Lastly, although rose rosette is reported in California, it is not that common in the eastern part of the state. I believe most of the reports are from the mountainous areas that are more to the west. Usually, the disease is present on native roses in those areas rather than cultivated roses in landscapes. To my knowledge, it is not found in your area at this time. }

She sent a follow up to clarify the miticide advice:

{Please note one clarification. The oils are one product that can be used to prevent mites. The other product (bifenthrin) is a second product and I do not believe they are available as a mix. They may not be compatible if you tried to mix them.

The primary bifenthrin product that I am aware of for home gardeners is this one:

It is not specifically labeled for mites, but is labeled for roses. Other common rose pests are aphids, thrips and Japanese beetles and the product is labeled for those pests. So, you can treat roses for those pests and it also happens to control the eriophyid mites. My suggestion to home gardeners is to alternate between the two products (oil and bifenthrin) every 2 weeks throughout the season. So, at the beginning of the month, you could make an application of an oil and 1/2 way through the month, an application of bifenthrin.}
Avatar for porkpal
May 15, 2018 5:07 PM CST
Name: Porkpal
Richmond, TX (Zone 9a)
Cat Lover Charter ATP Member Keeper of Poultry I was one of the first 300 contributors to the plant database! Dog Lover Keeps Horses
Roses Plant Identifier Farmer Raises cows Celebrating Gardening: 2015 Garden Ideas: Level 2
Thank yo, Kay!
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