Information and discussion regarding garden diseases, insects and other unwelcome critters.
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October 17, 2017 | #16 |
Tomatovillian™
Join Date: Dec 2010
Location: Sunol, CA
Posts: 2,723
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I know it has been published, but I think some research groups are skeptical. It is one of those results that will be sorted out fully in the next few years.
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October 17, 2017 | #17 | |
Tomatovillian™
Join Date: Aug 2011
Location: Plantation, Florida zone 10
Posts: 9,283
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October 17, 2017 | #18 |
Tomatovillian™
Join Date: Oct 2014
Location: virginia
Posts: 733
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TYLCV
Clemson University says;
TYLCV is not seed-borne, but is transmitted by whiteflies. http://www.clemson.edu/extension/hgi.../hgic2217.html |
October 17, 2017 | #19 | |
Tomatovillian™
Join Date: Jun 2015
Location: NewYork 5a
Posts: 2,303
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Quote:
mentioned but what was up-dated and when were the remaining studies conducted. (?) Just pointing out confusions when coming across studies not dated clearly. |
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October 17, 2017 | #20 |
Tomatovillian™
Join Date: Dec 2010
Location: Sunol, CA
Posts: 2,723
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Yes. But new reports have not been fully confirmed, and accepted (based on my reading between the lines in newer publications).
I don't think viral movement into seeds (particularly in plants with no systemic symptoms) is yet generally accepted for TYLC and tomatoes. Based on our experience seed borne transmission in resistant plants where infection is arrested after innoculation (in field grown plants), we do not see seed borne transmission evidence. This does not rule out low level infection, but it doesn't seem to fit with the disease (rapid and dramatic plant effects after infection) |
October 17, 2017 | #21 |
Tomatovillian™
Join Date: Dec 2010
Location: Sunol, CA
Posts: 2,723
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On another note, there is a very scary viroid that is currently a big worry in the commercial seed industry, because of clear seed-borne transmission.
Potato Spindle Tuber Viroid Potato Spindle Tuber Viroid has caused me to cease all trading activity with regard to tomato seed (until I figure out more about assays available, and the presence or absence of the viroid in my seed stocks). |
October 17, 2017 | #22 | |
Tomatovillian™
Join Date: Oct 2014
Location: virginia
Posts: 733
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Quote:
Pesticides updated by Joey Williamson, HGIC Horticulture Extension Agent, 10/16. Revised by Joey Williamson, HGIC Horticulture Extension Agent, Clemson University, 02/16. Images added by Joey Williamson, HGIC Horticulture Extension Agent, Clemson University, 07/15. Originally Prepared by Marjan Kluepfel, HGIC Information Specialist, James H. Blake and Anthony P. Keinath, Extension Plant Pathologists, Clemson University. New 09/00. Images added by Zachary Boone Snipes, Horticulture Extension Agent, Clemson University, 7/15. HGIC 2217 I assume by this that updates are provided as needed, one as recently as 10-16 I also assume there is a report confirming that TYLC is seed-borne and I have not seen it yet. Last edited by seaeagle; October 17, 2017 at 04:10 PM. |
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October 17, 2017 | #23 |
Tomatovillian™
Join Date: Aug 2011
Location: Plantation, Florida zone 10
Posts: 9,283
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Here's a scholarly from Nature saying previously TYLCV was not considered seed borne, but plants produced from seeds of a known infected plant had the virus, IN THE ABSENCE OF WHITEFLIES. https://www.nature.com/articles/srep...-transmission9
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October 17, 2017 | #24 | |
Tomatovillian™
Join Date: Jun 2015
Location: NewYork 5a
Posts: 2,303
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Quote:
Who would save seed from a clearly infected plant? (unless testing) I have saved no seed from the farm plants, zip-zero. Not sure yet why myself and neighbors, friends, far and wide, had such a bad tomato season, even some full grown tasty fruit but until someone can say for sure what happened... ...only saved seed from my other location without troubles. Deck micros/dwarfs and driveway containers. |
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October 17, 2017 | #25 | |
Tomatovillian™
Join Date: Oct 2014
Location: virginia
Posts: 733
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Quote:
All these seed-borne diseases makes all the more important to know where your seeds come from |
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October 17, 2017 | #26 | |
Tomatovillian™
Join Date: Sep 2009
Location: Alabama
Posts: 7,068
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Quote:
Bill |
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October 17, 2017 | #27 |
Tomatovillian™
Join Date: Aug 2011
Location: Plantation, Florida zone 10
Posts: 9,283
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One thing the article said was it takes up to 3 weeks for symptoms to show after infection. So saving fruit and seeds from infected plants might have been unknown at the time.
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October 17, 2017 | #28 |
Tomatovillian™
Join Date: Mar 2012
Location: Allentown, PA
Posts: 349
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Loving all of the conversation on this topic. I was not previously aware of this virus, and back in the spring when I posted for help on what was probably the same condition, we all accepted that it was probably just herbicide damage. Glad that there now is more recognition of this and that there seems to be a lot of work going into understanding it.
So, a few follow-up questions: 1. Is there anything that can be done as a preventative? Will spraying with Neem help to control the whiteflies? I've used Neem before, but usually only after noticing a whitefly problem. 2. I have used the yellow sticky traps for quite a while now, but I don't know how effective they've been. I always still have whitefly problems. Even on the plants inside my pool screen enclosure. Peppers seem affected the worst, to the point where I stopped growing them. 3. I believe my citrus trees have contributed to my whitefly problems. I used to have some plants next to one, and they were horribly infected with whiteflies. Since all three of my trees are suffering from citrus greening, I am having them removed tomorrow, actually. 4. If whiteflies thrive in warmer weather, maybe a later fall plant-out date would be helpful. Here in central Florida, I'm wondering if we're close to getting to the point of having one longer over-winter growing season like south Florida. In my four winters here, we've never once had a real freeze, and only gotten close 2-3 times. Last winter, I could have easily over-wintered if I had prepared for it (i.e., not given up on the mature plants to focus on new seedlings in January). In fact, I'm wondering if I should start new seeds right now and plant them out around December 1 rather than waiting until March 1. I will continue to monitor the PBTD plant that has not shown any signs yet. Fingers crossed. |
October 18, 2017 | #29 |
Tomatovillian™
Join Date: Jul 2011
Location: Atlanta, Georgia
Posts: 2,593
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Great thread. I have never seen whitefly problems in Atlanta, but given Bill's problems, I am sure it won't be long before they reach us here. What a terrible thing.
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October 18, 2017 | #30 | |
Tomatovillian™
Join Date: Aug 2011
Location: Plantation, Florida zone 10
Posts: 9,283
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