RRV in public or businesses
Echo_Texas_zone9a
11 days ago
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Sheila z8a Rogue Valley OR
11 days agoEcho_Texas_zone9a
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knockouts-rrd/rrv education vent- long
Comments (20)Mori and Kate, RRD has been in the Kansas City area for over thirty years. The paper in my web book Bibliography by Dr. Fred Crowe is, I think, available somewhere on line. He did a very good into as the disease was new to him and almost everyone else back then. Crowe, F.J., 1982, A recent Outbreak of Witchesâ Broom of Rose in Eastern Kansas and Western Missouri, Phytopathology 72(7): 976-977. (Abst.) Crowe, F.J., 1983, Witchesâ Broom of Rose: A New Outbreak in Several Central States, Plant Disease, 67(5):544-546 The picture Issa posted has the perfect shot of normal KO blooms after the petals have dropped : look at the five sepals on the two blooms on the right (one in the uppermost right corner.) Now look in where the blooms aren't dropping their petals neatly. Just above where the two black pots are touching each other there are sepals that are symptomatic of RRD on KO. Their sepals aren't like the ones at right, but have a (for lack of a better adjective) leafy edges, lots of stuff instead of the smoother edges you see at right. I've seen a lot more 'leafy sepals' appearing on roses that we saw last fall with RRD; the sepals excessive and aberrant growth is really bad. After KOs have been sick for several years, the symptoms change gradually and the leaves thin and more witches brooms appear and the blooms come in almost cone-like densities. The colors of individual witches brooms go from magenta to chlorotic green depending on where on the rose they emerge. If the symptoms weren't so ugly, they'd be interesting....See MoreNew accepted for publication rose infecting virus publication
Comments (8)Science can move rapidly. The abstract below was presented at the 2012 Petria -22nd International Conference on Virus and other transmissible diseases of Fruit Crops. Now that it is recognized that plants have an immune system against viruses (RNA Silencing) a logical next step is to use genetic engineering to add more RNA silencing molecular sequences. In the abstract below please note that they recognize that both low temperature and mixed virus infections can decrease the effectiveness of the plants natural immune system: "Since it’s known that some abiotic - low temperature - and biotic stresses - mixed viral infection - could have a detrimental impact on RNA silencing-mediated viral resistances," ---------------------------------------------------- Title: Robust and Wide Spectrum RNA SIlencIng Mediated Resistance TO PLUM POX VIRUS Authors: E. Di Nicola-negri(1), M. Tavazza(2), V. Ilardi(1) (1)Consiglio per la Ricerca e la Sperimentazione in Agricoltura, Centro di Ricerca per la Patologia Vegetale, Rome, Italy; (2)ENEA CR Casaccia, Via Anguillarese, 301, 00123 Rome, Italy Published in: Petria, Vol. 22 (3), 2012, 123-459, Abstract: "Plum pox virus (PPV) is a quarantine virus that causes sharka, one of the most important diseases of stone fruits worldwide. Seven PPV strains have been characterized, of which PPV-D, -M and Rec are the most important from an agroeconomical point of view. The best agricultural sustainable approach to prevent sharka disease consists in developing PPV-resistant plants. In this context we have shown that Nicotiana benthamiana plants transformed with PPV-M sequences (PPVIsPaVe44), covering the 5’UTR region, P1 and HC-Pro genes and arranged to express self-complementary ‘hairpin’ RNAs, are immune to the homologous PPV-ISPaVe44. However, as the RNA silencing-mediated resistance operates in a sequence-specific fashion, transgenic plants harboring the four hairpin constructs were also challenged with viral isolates belonging to different PPV strains. All the transgenic plant lines were resistant to PPV-D, ��"M and Recc strains. Moreover, the transgenic plant line harboring the 5’ UTR/P1 sequence was also resistant to isolates of PPV-EA and PPV-C strains that are distantly related to ISPaVe44. Since it’s known that some abiotic - low temperature - and biotic stresses - mixed viral infection - could have a detrimental impact on RNA silencing-mediated viral resistances, 5’ UTR/P1 plants were challenged with PPV under different conditions. Transgenic plants were resistant to PPV infection both at high (30°C) and low temperature (15°C). Furthermore, no susceptibility to PPV-Was observed in 5’UTR/P1 plants previously inoculated with Potato virus Y (PVY), Cucumber mosaic virus (CMV) or Artichoke mottled crinkle virus (AMCV) suggesting that prior virus-mediated expression of HCPro (PVY), 2b (CMV) and P19 (AMCV) RNA silencing suppressors was not able to defeat PPV resistance. The overall data suggest that the 5’ UTR/P1 hairpin construct can be profitably used to confer resistance to the sharka disease in Prunus species." The above is taken from a 338 page PDF document that gives the abstracts and/or full papers that were presented at that Conference. Here is a link that might be useful: Link to 338 page PDF document (long download)...See MorePDA's (Public Displays of Affection)
Comments (17)Somebody obviously has an agenda in this coffee shop story. I think that my only objection to some people's choices is that they want it to be okay to do things that most people prefer to do in private. I'm embarrassed sometimes if I happen to be watching a recorded show and one of my g'kids comes in the room. No TV couples...married or not...can keep their hands off of each other. I must have lived in the Victorian era. I don't recall us wallowing all over each other every single day and in every room. And I've been married 50 years and still engage........See MoreRRV, roundup, other?!
Comments (23)I started a longish post when my computer went blip! Here is the short version. Write a letter to the local newspaper's editor--be very polite, very informative, passionate, and fairly short. I always get immediate response when I do that--but of course I live in a smaller town that is sometimes nearly starved for local news. : ) Do something like: We have a problem, right here in Riverside City, and it is spelled RRV. What is that? The Rose Mosaic Virus that will uglify and destroy your beautiful Knock Out roses in one season. Don't believe me? Go to the corner of _____ and ______--in fact, take the road all the way back to Costco (that will get their attention) and see for yourself all the ugly distorted Knock Outs that have probably been declining due to RMV for the past couple years. RMV (rose mosaic virus) is highly contagious and has probably infected many roses within several miles of that highly infected section. There is no cure for RMV (rose mosaic virus)--the entire plant that is infected must be completely destroyed, roots and all, and put into a tightly sealed garbage bag. Are other roses also at risk? YES! Though for some reason, Knock Outs seem to be most susceptible. Please, everyone--tell your city/county officials who care for that section of the roads to destroy all those plants before the virus spreads to every rose in the city! And tell any business that harbors the RMV-infected roses on their property that you will not tolerate such horticultural negligence from any business you frequent. The more people speak up and object, the more likely we are to get this rose scourge uprooted and destroyed--thus saving the roses in our yards and gardens throughout the city. Respectfully yours, I'm serious. Fine tune that a bit to fit your gardening region, and go to it! If the newspaper people don't know you, it wouldn't hurt to add a one or two sentence "biography" that indicates you are a stable person and definitely a resident of the area in question. Hope that helps. : ) Kate...See Moreerasmus_gw
11 days agoElfRosaPNW8b
11 days agoEcho_Texas_zone9a
11 days agoElfRosaPNW8b
11 days agoEcho_Texas_zone9a
11 days agoElfRosaPNW8b
11 days agorifis (zone 6b-7a NJ)
11 days agoElfRosaPNW8b
11 days agorifis (zone 6b-7a NJ)
11 days agoElfRosaPNW8b
11 days agoEcho_Texas_zone9a
11 days agoerasmus_gw
11 days agoEcho_Texas_zone9a
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10 days agoEcho_Texas_zone9a
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