The Everyday Rose Show. A Discussion About Rose Rosette Disease
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- čas přidán 21. 08. 2020
- Raising Funds for Rose Rosette Research
charity.gofundme.com/o/en/cam...
There is a lot of information, and misinformation, about Rose Rosette Disease. I held a discussion with Dr David Byrne, Dr Kevin Ong and Dr Mark Windham to talk about RRD. We talked about it's history, what spreads it, what does it look like, tips to prevent it and what to do if you get it. We also answered questions provided to us by gardeners like you.
The research they do is generally funded by grants. This year, (2020) they did not get the grant so we have set up a Charity Go Fund Me Page to help fund their research. In cooperation with the AGRS™ (American Garden Rose Selections™), a Charity Go Fund Me page has been established and you can donate now to help with this effort. Please make a donation to this vital work.
gofundme.com/f/raising-funds-for-rose-rosette-disease-research - Jak na to + styl
Thank you for this great expert panel advice. When the dogs flipped out I laughed out loud!
That moment caught us all by surprise!
This is my favourite post of yours, so much information! And and I love 'A Season of Everyday Roses - Post #3'
Thank you!
Outstanding information! Thank you!
Thanks!
Excellent information in this video & that hat is awesome.
Thanks!
Thank you all for the good information. I have managed and maintained the Laura Conyers Smith Municipal rose garden in Kansas City, Missouri for over 30 years and have seen an increase in rose rosette in our garden but with regular inspections and by removing the infected roses as quickly as possible we are able to keep the garden healthy. We also have Vibernum shrubs planted around the perimeter of the garden and are adding more to keep a physical barrier in place with the hopes the mites land on the viburnum and not the roses. Thank you again for the good information I will be sure to share it.
Thank you for the comments and for sharing it. Mark Windham talked about barriers of non rose plants being a big help. Also perennials between the roses might help stop the spread within the garden itself.
I’m glad to hear Mark thinks plant barriers are a good idea. I am always hopeful about the garden and learning new ways to protect it and make it healthier.
This was very informative. I chuckled when I heard Dr Mark Windham said "God only knows what kind of witches brew" rosarians have applied. It's TRUE!!!!
I laughed when he said that as well. And as you say; so true!
Hello, everyone!!
Hi Back!
Great video ♥! As a fellow CZcamsr, I am contantly searching for fresh ideas! Great Job!
Thank you!! 😊
I need help! My rose bush I moved is dying. I just dug around it and its flooded! I'm not sure how long its been that way. How can I save it this one rose bush means a lot to me!
Hi There, Happy to help. I have a Facebook Group for this kind of thing because you can post photos there. Ask to join and I'll admit you. Then you can post. Lots of experts there. facebook.com/groups/58500441971/
Good commentary. How close are scientists to finding something to combat RRD?
How close are we to finding something to combat Rose Rosette? A great question and I apologize for the length of the following answer. The ultimate goal is for rosarians to be growing roses that are not affected by Rose Rosette Disease. This ultimate goal will take time, so how do we fight rose rosette until the ultimate goal is achieved?
One answer is using miticides to minimize vector populations that will lead to a reduction of spread of the virus into a garden. To this end, four miticides have been found to be effective at the University of Tennessee. The active ingredients of this miticides are bifenthrin (comes in many homeowner products and in the commercial operator product Talstar), fenpyroximate (commercial operator product Akari), spiromesifen (commercial operator product Forbid) and spirotetramat (commercial operator product Kontos). You will note that only homeowner products with bifenthrin can be sprayed legally by homeowners. In our work, initial sprays started just before first bloom and ended late in the season. All miticides were effective on two week spray intervals. At the University of Georgia, where miticides were started in late June, they were not effective. I suspect eriophyid mites had already ballooned to test plants in the Georgia test before the first application of miticide. Another issue is the use of Kontos since it can only be applied four times during a season. In UT’s work, the goal was to determine if they worked. They did! However, we would never recommend the use of that much pesticide in home gardens. We need to know when to start using them (correspond with the timing of when mite populations begin to build up), how long can we go between spray intervals but remain effective (this is necessary to minimize the amount of pesticide released in the environment, reduce control costs to a minimum, and reduce the chance of mite populations from developing less sensitivity to the pesticide (pesticide resistance)). Also, the maximum interval between pesticide applications may not be the same for all miticides and in all parts of the country. We also do not know if rotating miticides would be effective. So we know which miticides work, but we don’t know timing. This just takes work - costs money.
We know that barriers reduce the introduction of the virus into rose plantings by having the mites intercepted by nonhost plants. The use of barriers worked well in our experiments for 5 years.. However, everyone cannot use barriers like we did in our experiments - each rose bed was surrounded by a barrier on nonhost 6-7ft tall ornamental grasses. So barriers work. However, to be practical, the question is can we use attractive, nonhost plants between roses in our gardens to prevent mites for landing on the roses? This work would have been part of the last proposal but alas the proposal was not funded.
Finally resistance (and tolerance). We have identified rose germplasm that we cannot infect (at least there are no symptoms and we cannot detect virus in the plants - there is no guarantee that there is not virus at a very low titer that we cannot detect). We also have a list of tolerant roses - roses that have virus in them that is detectable but the plants have no symptoms. These tolerant roses sound attractive don’t they? But what if mites can pick the virus up from them and move the virus to other plants in a garden? What if a tolerant plant (rose rosette disease can’t be detected by looking for symptoms) and that plant is infected with rose rosette virus and the plant is moved into an area where rose rosette disease had not been reported. Could it act as a “typhoid Mary” and we unwittingly move the disease into new areas? A lot of work needs to be done with these tolerant plants. As for resistance. I have worked with the plants identified as being resistant (immune). I have also been a rosarian for decades, am a member of ARS and a past president of a local rose society. Frankly, I would not want these resistant plants in my garden. They just don’t have the horticultural characteristics I want in a top rose garden (although my personal gardens are far from being call top gardens). We have to move resistance genes from identified resistant germplasm into desirable roses. Six years ago, we did not know resistance existed. We do now! We just have to get it into a useable form. That is why we cannot afford to stop the work, but we cannot continue the work without funding.
So the bottom line is we have miticides that work, but our knowledge needs significant ‘tweaking’ in how to use them safely and effectively. We know that barriers work, but we need to figure out how to make this cultural concept useable as an attractive option in a garden. We know that resistance (immunity) exits, but we need to produce resistant plants that are desirable for our gardens. We know there are tolerant cultivars, but we need to know if these plants are gifts from heaven or Trojan horses that will unleash ‘plagues’ into new areas.
Have we solved the problem? No. However, I feel we are getting agonizingly close to solving this thing. Why agonizingly close; because we do not currently have the resources to see this thing through to completion.
Mark Windham
Paul Zimmerman Roses Consulting & Design thank you so much for the thoughtful and detailed reply. I would hate to see adored rose varieties be lost to history because of RRD. I hope you keep us updated through your channel. Your passion for roses is contagious!
Quest: does rose rosette spread from rose to rose or it can infect any plant in the garden if one rose gets it? For example if a rose is infected and there’s hydrangea and peonies next to it, does gardener need to take them out too?
It's specific only to roses. In fact having other plants can help deter the spread. If a mite lands on something other than a rose it dies.
@@Paulzimmermanroses ok. That’s a little relief.
@@islagrace5053 I live in a hot spot for it and I've figured out how to live with it. As we say in the video. Be vigilant.
@@Paulzimmermanroses thanks.will definitely do that.
Odd… I have observed that it showed up in my blackberry plant, GMO to be thornless then it started to grow site specific branch full of thorns as shown in infected rose bush with rose rosette.
Turned out , the blackberry rosette is caused by Cercosporella rubi (fungal) and not viral. Yah!
It would be nice if rose rosette.org would reply to suspected reports of this disease in a timely way. As a rose grower I find it very frustrating to see a lack of reply to suspected cases. If you do not want to reply or do not have the time I would be happy to reply to suspected cases in Florida. Your lack of handling suspected cases places a negative face onto all of the Florida nurseries that have never had a problem. This affects our wallet.
I'm not affiliated with the site. I just recommended it as a source of information. Have you tried to contact them directly?
@@Paulzimmermanroses Yes. months ago.
@@retiredlogman I don't know what their policy is. Sorry I can't be of more help.