Crown gall wisdom sought
Mrs Teakettle z9
3 years ago
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Comments (7)
Katherine OK zone 7b
3 years agoRelated Discussions
Question About a Damaged Cane
Comments (10)Jerome, Not to worry. It's just that in our part of the world, summer droughts happen, and the heat that causes rose growth to slow down can start in May and last through August. I see growth in spring and fall, but not the midsummer growth that lots of other (kinder climate) parts of the world have. Do we seal the damaged part? I haven't. But I've been tempted. (I've had lots of damage to watch (BIG lawnmower). When a break has exposed a lower surface, I have rarely had some stem gall happen. It doesn't kill (or gird the way that crown gall does), but given what I've seen (and the propensity of that part of my garden to crown gall), I would first spray the break with the Lysol that kills bacteria and viruses. Then wood glue, after the Lysol dried. I might even do a dusting with Mycorrhizal Fungi (because I have them.) before glueing. The duct tape is too strong and I would expect that a broken cane can last three or four more years and tight duct tape can gird. We aren't the only ones who through time have noticed that young tea roses have a different growth style than older teas. But I'm still looking for a discussion based on the wisdom of two centuries (as well as a name for the younger plants to distinguish them from the older, woodier plants.)...See MoreWhat do you do when you receive a Virused plant?
Comments (94)Henry, your statement "Is the pruning and cutting shears warning relevant to PNRSV in roses?" Response -- found in this paper: http://pub.jki.bund.de/index.php/JKA/article/download/605/1515 Pertinent statements from above paper quoted below: "PNRSV and ApMV transmission by seed, pollen, on cutting implements and by root grafting from infected plants to healthy plants has been reported and the results showed that root grafting is involved in the natural spread of the virus in roses (Golino et al., 2005)." Note "...and the results showed that root grafting is involved in the natural spread of the virus in roses." This means that claims of transmission via "cutting implements" were dismissed because of root grafting. Root grafting would require that roses are planted very close together, and results in contact more intimate than occurs via pruning equipment. Also: "Because the only proven means of transmission of RMD in roses is through vegetative propagation of infected buds, scion or root stocks, the use of clean and virus-tested production material is essential to improve productivity in gardens." When you pull up references that say what you want to say and post them in isolation, you are neglecting to acknowledge that those statements were later further evaluated and discounted. The paper I cited is from 2010. Any rebuttal of the above must therefore be more recent to be taken seriously. :-/ ~Christopher...See MoreGallbladder woes
Comments (80)Saw the surgeon for follow-up, and everything is looking good. I still have another week of activity restrictions before I can head back to the Y. I lost a few pounds, but there's better ways to do that. I have flexibility to work from home when needed. Classes started yesterday. Here is little girl kitty from Sunday morning helping her mamma feel better. Love her beautiful face. Yes, I have on flamingo pajamas....See MoreNot good news, at all...
Comments (87)Wonderful to hear about the Texas research extension’s progress. I just looked them up and found this article from a couple years ago that shows they were working on the RRD problem in 2015 and anticipated then that it would be 5-10 years before new RRD resistant rose varieties would be on the market. https://today.agrilife.org/2015/09/03/nations-researchers-team-up-to-improve-protect-roses/ Also this exciting excerpt from this article: (“With this technology, maybe we could essentially transform all the rose varieties to those that are resistant to disease — and not just well known diseases such as black spot but also to upcoming diseases such as rose rosette.” The emerging malady, rose rosette, has become such a devastating disease in many states that a second, five-year national research effort by some 20 scientists is targeting that disease specifically, said Byrne, who is leading the breeding component of that project. “In this second project, we are also developing markers in trying to understand the rose rosette resistance, which we don’t know much about at the moment,” he said. “The first step is doing a lot of screening for rose rosette resistance.” ). But they seem to be talking mainly about breeding new rose varieties that are resistant to the RRD virus. If you want to insert the RRD resistant gene(s) into an old established rose variety then a technology like CRISPER will be needed. Also that old rose may need to be amenable to growing as a cell culture in a Petri dish, at least for the gene insertion event. I am guessing that since the Rosa genus is very genetically diverse, some roses will be much more amenable than others to Petri dish growth. I remember reading years ago, when I was a grad student, how they removed rose mosaic virus from established old rose varieties when no disease free strains could be found. They grew the plant under high heat stress to reduce the viruses vigor. Then they took plant tissue from the faster growing tips of the rose that the virus hadn’t reached yet and put these cells into a petri dish with a sterile medium, nutrients and growth hormones. From these few cells they regrew a mature plant without the viral infection. If only it were this easy for RRD....See MoreMrs Teakettle z9
3 years agoKatherine OK zone 7b
3 years agoKatherine OK zone 7b
3 years agolast modified: 3 years agoMrs Teakettle z9 thanked Katherine OK zone 7b
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Mrs Teakettle z9Original Author