Rose Rosette Disease (Witches' Broom Virus)
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- čas přidán 18. 10. 2019
- If you're concerned about rose rosette disease, let me describe some if the signs and risk factors for you. The rose rosette virus is spread by eriophyid mites in North America only - rose growers elsewhere in the world can be thankful for that, and hopeful that the virus doesn't find a way to jump continents. The main distribution of the disease follows the establishment of invasive Rosa multiflora - a susceptible variety that spreads through much of North America, and acts as a natural wild "reservoir" of the virus. In this video, I'll discuss the symptoms, measures you can take to minimize risk, and what you should do if you find infected plants in your garden.
For sites with loads of photos of Rose Rosette:
www.ipmimages.org/browse/autt...
www.pubs.ext.vt.edu/content/d...
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Photo credits:
Rose Rosette Disease on R. multiflora, photo by Kerry Wixted used without changes under the Creative Commons Attribution 2.0 Generic license
Rosa ‘Radcor’ with rosette virus, photo by F.D. Richards used without changes under the Creative Commons Attribution-ShareAlike 2.0 Generic license
Rosa multiflora, photo by 清水五月used without changes under the Creative Commons Attribution-Share Alike 3.0 Unported license - Jak na to + styl
All 9 of my knockout roses have this disease. In middle Tennessee, zone 7b. So much care, time and money down the drain. Meanwhile, the knockout roses down at Burger King and Taco Bell that never see a lick of fertilizer, are never trimmed, only rain watered and have roots showing, are flourishing and beautiful.
Some professional roserian CZcamsrs are entertaing and informing. But , you are the "go to guy". Thank you for sharing your knowledge of roses with the world, Jason. Keep them coming
Thanks!
I went on a vacation and came home after 10 days and I found my rose bush with the disease! I didn’t know what it was at first, I noticed all the rapid growth and the excessive thorns! After searching on Google and CZcams, I’ve confirmed it’s RRD. I so sad… Thank you for the video and advice!
I’m in Georgia by the way!
I just watched your video. My roses are full of blooms and so beautiful. I did notice a chute growing straight up with red leaves and as I was researching mites etc . I saw a pic that looked like mine. I googled it and chose your video as a subscriber to watch and learn. Sadly I will dig up and burn the bush and look for signs on my other roses now. The bush that has the chute is one of my first.It is a knockout variety and looks extremely healthy other than the "witches Broom". I live in North Alabama, if that will be of help to others.Thank you for sharing your wealth of knowledge with us.
Love your videos. Greatly appreciated!
Thanks for the encouragement Heather!
Good video thanks.
Very informative. Thanks
My pleasure
Yes! I’m in north texas. Hard hit by Rrv.
I’ve had to remove 26 roses from my landscape. Commercial landscapers won’t remove infected plants making the problem worse. Good info! I’m
Actually working on video about this on my channel. The thorns that look like they’re on steroids is a great indicator! I’ve also noticed more ant activity on infected canes which is weird. I only have 1 Rose that hasn’t succumbed. Don’t know the name of this specific rose but it is thornless and heirloom. Every year I cut it completely down to ground in feb and let it regrow. Not certain this is reason why it’s still healthy. Rrv is very sad. 🥀
Thanks for sharing your first-hand experience - I'm not hearing that much about it locally (yet!), but in the places it's hitting hard, I know it can be devastating.
Fraser Valley Rose Farm truly devastating, just so sad. I have read that it’s been around since the 50’s but with the breeding of and over selling knockout roses it really pushed it into the forefront of rose gardening. I do t know if that’s true but in this area knockout roses were everywhere. Everywhere. And they’ve ALL succumbed to it. Thank you for your video and helping make ppl aware.
My pleasure. Your point about mass plantings is well taken - the quantities of Knockouts sold into the eastern US over the past couple of decades has been incredible. Those huge roadside and institutional landscape plantings (of what it's now clear is a fairly susceptible variety) would definitely add fuel to the fire, so to speak.
Something I read said that the mites overwinter in the buds of the plant, so you're effectively destroying the mite population before it comes back each year? I have an infected plant and am waiting for freezing temps hoping to take out the mites w/the plant.
Always love your videos, Jason. Recently added to my rose collection and ventured out by purchasing 2 Bourbons: Variegata di Bologna and Zephirine Drouhin. My garden is quite diverse with various types of other plants scattered about in an old English style, boarder plantings. Other roses include David Austins, Foribundas, Grandifloras and Hybrid Teas. Have you any advice on how I could keep all my beauties safe and are my 2 new Bourbons particularly susceptible to rose rosettes? 🌹
There's not much preventive you can do for rose rosette except for scouting nearby roses for symptoms & prompt removal. It's a windborne mite that spreads the disease, so if you know the prevailing wind direction, you can focus your efforts upwind a ways - looking esp. for wind populations of r. multiflora that seem to be associated with its spread.
I've had 3 Rose Rosette Disease occurrences so far. Two were on Knock Out Roses and the other was a Drift Rose. I'm hoping that the virus won't get to my David Austins and my beautiful rose trees. I'm in Rye NY
Yes we have it in West KY, removed several Knock Out roses and burned. Multifloral are everywhere here so removing them is not an option in our area. Thankfully have not seen it for a couple seasons now after removing those infected. As you mentioned I do see it a lot in large plantings. Local horticultural experts are recommending the same strategy remove those infected and destroy also for those that don't mind spraying chemicals some use miticide's but mites tend to become resistant easily. I don't use or recommend it.
Thanks Tim. We may a bit of R. multiflora growing wild, but nothing like you have in the eastern US. Did you lose many roses?
@@FraserValleyRoseFarm Only four but we really hated taking them out but it did solve the problem of additional spread to others. Thankfully most of our roses are dispersed within the landscape. We replaced with some dwarf j maples and boxwood. I've got my eyes on some other disease resistant replacement roses to add in the future. I really enjoy your channel!
Tim Goodin I’m in Western Ky and I’ve lost 4-5 huge bushes. They were so pretty! 😢
Oh wow. This is tragic. I thought a couple of my rose bushes looked like they had cancer. The mutated appearance of rapid out of control growth was just bizarre and no one could tell me what was going on. I just thought my roses needed to move another place so I dug them up and put them in containers. I bet I soaked roots of a few of them in the same water together before transplanting 😰. Oh well, worst case scenario...I’ll have to get rid of them. I guess I can sanitize the pots but never to use them for roses again. I hope a treatment will be discovered before I find out how many I cross-infected.
Ugh. Sorry to hear it. I'm crossing my fingers for you and your roses.
Jason, I have a rose bush that is 3 generation's old and it is killing me to dig it up and burn it but I don't want it to go to my other rose's thank you for the video.
I had one and dug it out today. Don't know if the virus already spread, it showed up in May, I just got rid of it. Keep my fingers crossed.
Need help.
Can you tell me what size containers do best for roses? Plus, are ceramic pots better or plastic? Considering that I live in an arid climate.
I'm in North Texas and thought this off shoot looked strange, so I went to my local nursery and was told what it was, They took the shoot and said I could not take it with me and it needed to be burned. I returned home and looked it up on OSU extension page and gives a lot of good information, and I feel most importantly it stated never use a leaf blower around roses, because this blows the mites on your roses and spreads the disease. Terrible loss since I have a entire bed of roses,
Thank you for this tip!!!
You did say that Roundup over spraying can mimic Rose Rosette disease. I’m in the agricultural area of the southeast where Roundup is used and I even use it some. I wish I could get away from its use.
Thanks for the warning. Unrelated question though: I have a grove of rosa rugusas (sp), they grove profusely. Would other roses do as well in that spot too (cut flower garden roses)? Going to plant some garden roses and thought it would also do well there. I love your channel. You get right to topic and provide invaluable info. Thanks again .
My pleasure J Si. Rugosa roses are a bit more tolerant of difficult conditions (sandy/poor soil, intense sun, air pollution) than other roses, but of course that doesn't mean your spot is poor. If the soil is reasonable and it gets 6 or more hours of sun, it's worth a try.
Thank you. Soil will need amendments but isn't as wet as the rest of the farm. You are great! Thanks for taking the time to reply. J
I have two iceberg roses tress that the new growth looks a little curled a tad bit of red on them I also don’t see a lot of thorns but the new growth is very thick and. Leafs are curbed and folded. Could this be a issue with over fertilizing
Thanks Jason. We had a late freeze. I don't have a lot of open blooms yet but a lot of healthy looking buds. I fed them in February when I pruned and again a few weeks ago to support the new growth. I put two organic Jobes spikes each time. Naturally I had some leaf die off and some occasional red half moons on some leaves with partial die off. I was trying to determine if that was a sign of overe fertilization. I found this video because of abundance of burgundy colored foliage on a couple of bushes. I didn't see any mites just lady bugs. I guess more will be revealed over time. I'm a beginner if it's not obvious
The amount of thorns are normal. I don't think I have rose rosette.
Good to hear!
@@FraserValleyRoseFarm They popped! They just wanted a little extra time this year because of the late freeze I believe. More time for me to worry and learn more from your videos. Thank you Jason!
Very informative and helpful. There are a lot of multiflora roses in my neighborhood. I've noticed that some of the nearby knockout roses looked downright peculiar this summer and had very stunted blooms. I need to give them a closer look and see if it rose rosette disease. The difficulty is that the rose bushes don't belong to me so I can't remove them personally.
No kidding - it might be a tad rude to "shovel prune" someone else's roses!
@@FraserValleyRoseFarm The roses belong to our Home Owner's Association so we have like 100th ownership of them. There would be rather a lot of red tape to go through to get them removed. Have a great evening!
HoAs should be made aware of this virus! I’m sure the neighbors would be upset if the RRD spread across the entire neighborhood.
@@thingsmadenew8352 Thanks for your concern. Fortunately, very few of my neighbors grow roses--not as many gardeners here as I could hope. At some point I need to bring RRV up to the HOA, but they are still dealing with effects from the tornado we had this spring. My roses are a distance away and not taken care of by the landscapers so I haven't had any on mine.
Thanks for another great video. Isn't Rosa canina and Rosa multiflora often used as rotstock for many roses? Does this affect the cultivar rose to make it more likely to be contaminated?
Thanks wictorsson. Yes, R. multiflora is a common rootstock, but I'm not sure that makes the scion variety more vulnerable. The mites infest the foliage and flowers, so that would be the entry point for the virus. So the way I think of it, it would be the resistance or vulnerability of the topstock variety (to the mites or the virus itself) that would best determine the risk.
This breaks my heart I see some small ones on my Roses but I clip them out last year they came back but it look like when I clip them out the dont come back i hope and pray they dont take over
I am sad that here in Washington, one of my roses is showing a lot of the symptoms. It’s not progressing like the other roses. It was healthy earlier in the season and I got green foliage but all of a sudden one of my favorites is struggling
Can you help me please my roses are dying they look like don’t have water but they have they try to give flowers but the flowers is just dry .
What a backdrop
Thank you for this video. I just discovered this dreadful disease after watching its symptoms since last fall and have now destroyed 3 of my most beloved roses to protect my 2 newest, youngest ones. Hopefully they have not had the chance to catch it. I’m in NY and I definitely see that other wild rose multi flora growing nearby. It’s devastating bcz I was going to plant the large 3 into the ground this spring bcz they had well outgrown any pot planter and this morning they became wood for the fire pit. I have a hole in my gut.
Oof. I'm sorry to hear it. I'll cross my fingers that your others are okay.
Hello, Jason, I just happened to watch your video the other day on rose rosette disease and realized that one of my roses definitely had it. Then I looked at the 2 rose bushes closest to it and it looked like it was starting so I pulled them all out. I was wondering if planting a different plant in the same spot would be OK. Or if I decide to plant roses again should I wait until next year? Thanks so much, Patricia
Make a big hole and replace the soil if you can
@@bloomy974 thank you.....that was a long time ago!
I’m heartbroken as I discovered today several of my roses have this disease. The growth looks just like the photos of Rose Rosette disease. Never had anything but the usual challenges with aphids, blackspot until today. I thought something might be wrong when I sprayed last week, but today there isn’t any doubt. I probably have 60 roses. At least 17 are infected. I spent the day undoing my hard work, and removing my beautiful roses.
I'm so sorry to hear it! I haven't seen it in person yet (in my region) but the pictures are pretty distinctive. The only other caution I've heard on the forums/facebook groups is that sometimes herbicide spray drift can mimic the symptoms to a degree. But if you're sure that's a real shame.
Thank you! Would a grafted plant on multiflora attract the mites? I got it in my garden from the grafted roses I ordered online, it's now spread to 7 plants that I had to throw:( VA(US)
Ouch! That's a good question, but I actually don't know the answer. My impression of the role of R. multiflora in the spread of RRD was as a susceptible naturalized host plant in the wild. Usually, any of the rootstock qualities would apply only to the rootstock itself (except to also regulate the vigor of the topstock) - but I could be wrong.
Hi Jason
How are you? I am facing some problem with my rose plants. For example all of the new foliages are getting dried and there are rust on the older leaves. The buds are also getting dried. I have already applied some fungicide but no improvement. Can’t understand what to do.
Can you please suggest me what to do now?
And also requesting you to make a complete guide of rose diseases and their treatment/care.
Thanks in Advance.
Regards
ATAUL KIBRIA
From BANGLADESH
Sorry to hear it Ataul. Where are you growing?
I am from Russia, and I found it on my roses this season! It can spread across continents for sure 😭
В каком месте вы живёте? Может из питомника попала при заказе?
I had one rose that has been there when we bought our home. I think it's at least 30 years old(we've been here 20 years) and smells amazing. This year I noticed this on it. It's heartbreaking. Unfortunately, this thing seems to be going along my whole street...
So sorry to hear it!
We have it in North Arkansas, but more so in some years than others.
Thanks. Lots of R. multiflora where you are?
@@FraserValleyRoseFarm, a fair amount of them, yes. I lost 3 roses to rrd in 2016, 1 in 2017, but none the last two years.
It has blown down to west Lt. Rock. The restaurant where I work had to take out 6 big shrubs in July and today I saw symptoms on a few knock outs on the opposite side of the building.
Is it seasonal? I just noticed the red leaves stay there for longer than expected time but the flowers come out quite normal so far. Will take a closer look to see if they have more thorns than normal. Thanks!!! (BC)
Hi JasonECI - in the absence of other growth abnormalities, I wouldn't assume the new growth persisting as red is a problem. As we go into cooler weather, I'd expect the new shoots to take a while to leaf out and mature to green. Also, no real reports of RRV here in BC. Thanks
Thanks Jason, the roses in the yard don't have more thorns than normal, so I feel safe for now.
I know you said you shouldn't plant more roses in the same spot but how long to wait before I can plant them in the same place , thank you for the tips
There's no hard and fast rule about it. I usually like to go a season with other plantings in the spot, but wouldn't hesitate to plant a larger & more established rose and would also inoculate with mycorrhiza if I was planting it sooner.
Sadly, I'm 99% sure my rose bush I only planted last summer has this. Can it spread to other close by plants? I have a Hydrangea next to it that isn't faring well either. I have another rose bush about 25 feet away that is showing early reddening signs, is there anything I can do to save it? Thanks for this informative video.
Hi Jennifer. Red growth on its own is not something to worry about. There are more clear-cut signs like the extreme distortion of new growth - but even those can be mistaken because of herbicide drift, etc. If you're at all unsure, you should look for a local lab to confirm the diagnosis. It doesn't spread to hydrangeas, but can spread to nearby roses.
I have a rose w/it on a newly acquired property. My sister is the plant person and has roses herself. In trying to figure out what kind of rose I had, turns out it is a diseased rose. I thought I'd read that you can transport those mites between plants while I was researching. So, I sent information about it w/pictures and told my sister that if she notices the symptoms, to treat the plant as needing to be isolated till she's sure. BUT, my point to her was to NOT go up and handle a rose that looks funny like rose rosette so that she doesn't take what ever it is back to her roses. (My background is with animals that you definitely do quarantine for safety reasons)
So, my question. In your research, did you see anything about being able to transfer the mites between plants on your person from handling an infected rose? I would feel terrible if her roses all come down with this next spring.
Thanks. I didn't see anything specific about human spread of the mites - mainly that the mites were spread by wind. I do share your concerns though, and if I found symptoms on one of my roses, I'd be likely to err on the side of quick removal or isolation to minimize risk to my others. And yeah, I'd be real sure not to share tools or even gloves between them.
Hello sir thank you for this helpful video. I believe my double knockout roses have this disease. I will remove them. Can I plant new flowers there, perhaps hydrangeas? Do I need to dig out the old soil?
Sorry to hear it. Yes, there's no risk to anything but roses - so a hydrangea can go right into the same spot.
I am in inOklahomai been having roses for over 30 years. .this is the 1st time I have this disease on my rose.
Sorry to hear it!
Last year over the summer I had a rose with rose rosette (I removed and burned it). It was a new rose I had planted in spring and in an area of the yard with no other roses having been planted before so I feel convinced the rose came w the virus. My question is about another rose, from same supplier, planted at the same time about 30feet apart is coming out of winter dormancy and it has some dark mottling on the canes but my actual concern is it has a lot of very tiny thorns covering the canes. These are the canes from last year, they are not new growth with that classic rose rosette look like the other rose had, but of course I’m paranoid. Have you ever seen your roses after winter being covered with a ton of very small thorns in addition to the normal thorns? I’m hoping you tell me this is something that happens for other reasons 🤞 thanks!
Hi Joe. It's nothing I've noted, but I think it could depend on the variety quite a bit. I'd definitely be looking for something more overt as a sign to confirm rosette.
@@FraserValleyRoseFarm thank you- agreed. Is it be beneficial to spray the rose with an insecticidal oil such as neem to kill the potential mites that spread the virus?
I had this same kind of mottling and tons of clusters of thorns all on the new and older canes… as the disease progressed. I’m not saying your rose has it, I honestly didn’t know mine had it until it showed many other awful signature signs… plus I’m in a prone region.
How long should I wait until i replant a rose in the same area? I have two openings in the concrete along the sidewalk in the front of my house. One rose (that i dug out) started to show these deformed flower symptoms while the other...roughly 30 feet away did not. I removed the plant and most of the roots. How long until the old roots die or the virus dies?
Hi Robert. I saw Oklahoma State U recommended a 1 to 2 month fallow period to allow any remaining root fragments to decay.
Fraser Valley Rose Farm excellent! Thank you so much!
🙏🙏🙏❤️👌
Sometimes I look up images of rose rosette just to tickle my fascination of creepy things. Roses are supposed to be wonderful, delicate, beautiful, not this nightmare fuel! Unfortunately, people on other continents also report this virus nowadays.
Thanks. I hadn't heard RRD had made it overseas! That'd be a shame.
@@FraserValleyRoseFarm to be fair, I have only seen it reported by amateur gardeners, who could be fearfully misidentifying it, so you are probably right. But I can see it as possible, since gardeners love to share cuttings, and you can order roses from almost anywhere in the world. I think we have proven as humanity that containing viruses is not our strongest point!
is there anyways someone can help me determined if my bushes have RRD? they were given to me and for now they are in pots
Best I can suggest is to compare to the (many) photos online. If it has those kinds of discoloring, proliferation, distortion and it hasn't been exposed to an herbicide, I'd bet it's RRD
How can I tell if it’s just the growth of new leaves? I have treated my roses early with a pesticide and fed them. Well my rose leaves are fuller then ever but I have red leaves. They look healthy and not all are red but some. I have never even heard of this issue but after watching videos and doing the prep work early this year I noticed more new leaves red. Now I’m nervous.
Hi Lois. Red is fine - better than fine actually. It's the color of vigorous new growth. It's only when you see the other symptoms: "witch's broom", twistiness, abnormal thorniness, congestion that I'd be concerned initially. Give it a little time. In a healthy rose, the deep red growth will begin to harden off and transition to green over the next couple of weeks. In RRD, it just gets more congested and stays red.
Damn....loads of sadness. I transplanted some of my mum's roses to my garden right after she passed away. One variety actually shared her first name. (And her middle name was Rose.) Now it appears I'm going to have to destroy one or more of them. :(
Sorry to hear it - are you quite sure about the diagnosis? I've seen herbicide damage (or even fresh new red growth) mistaken for the symptoms of RRD - and I'd hate to see you pull anything out without a confirmation.
@@FraserValleyRoseFarm Wow, thanks for getting back to me. I haven't yanked the rose(s) out yet. I am digging through my gardening books and online to make sure I'm not over reacting.
Понавыводили в лабораториях всякой ерунды😡 У нас в Украине сроду не было такой болячки на розах! А тут вдруг последние пару лет массово встречается!!!
What if roses have rosette but they are flowering fine ? Also do they cause any damage to people
No damage to people. The main risk is that it'll spread to many other roses in the landscape
I'm so very sad. My very fist rose bush I planted and grown successfully has a clump of leaves and I'm almost certain is this 😭
That's a shame! Where are you growing?
I’ve lost 4 bushes to this. So upsetting . 😢
We don't really see it in the lower mainland do we? Im in North Vancouver
No, not that I've seen or heard about. I sometimes get a scare when I see weird new growth on a rose - but it should also be noted that the symptoms of herbicide drift (and even a severe case of powdery mildew on a new shoot) can resemble RRV. If in doubt, we'd have to check with the plant lab.
@@FraserValleyRoseFarm your video was sooo helpful to identify if I have rrv on one of my bushes or not. I'll keep trouble shooting to see what it could be. Got the frilly leaves but they're yellowy with green veins like a deficiency of mag or iron... I'll keep an eye on the new shoots as they progress...so far the leaves on the new shoots looks normal. I had recently repotted into a planter on the side of the house and had added some compost and slow feed. Perhaps that helped
Oh wow. This is tragic. I thought a couple of my rose bushes looked like they had cancer. The mutated appearance of rapid out of control growth was just bizarre and no one could tell me what was going on. I just thought my roses needed to move another place so I dug them up and put them in containers. I bet I soaked roots of a few of them in the same water together before transplanting 😰. Oh well, worst case scenario...I’ll have to get rid of them. I guess I can sanitize the pots but never to use them for roses again. I hope a treatment will be discovered before I find out how many I cross-infected.