Possible problem?

[feldon30]

Man that just really sucks. I did not know this was a problem anywhere in Texas. I too am hoping that those 2 plants are the end of it. I do know that TSWV and TYLCV are not soilborne.

[travis]

Originally Posted by feldon30

Man that just really sucks. I did not know this was a problem anywhere in Texas. I too am hoping that those 2 plants are the end of it. I do know that TSWV and TYLCV are not soilborne.

An article at this link http://aem.asm.org/cgi/content/full/...urcetype=HWFIG
includes the following paragraph regarding TYLCV's spread from Mexico through Arizona to Texas and Louisiana:

"After the confirmation of TYLCV in Sinaloa, TYLCV was found farther north in Mexico (14), in Texas (16), in Arizona (14), and in southern California (38). Our analyses further confirm that TYLCV-US:CA is most closely related to the western Mexican viruses (38) and therefore likely spread over the border from Mexico (Fig. 1). However, others describe an Arizonian isolate (sequence currently unavailable) that is more closely related to TYLCV-US:TX, which is part of the ENAC clade (Fig. 1), than to viruses from Mexico (14). We therefore conclude that the ENAC strain of TYLCV, which had spread to Louisiana by 2000 (45), has spread through Texas to Arizona but that the first TYLCV to be isolated from California is more closely related to other WNA TYLCV strains from Mexico. This is not surprising, as two other geminiviruses infecting tomato, Tomato leaf curl Sinaloa virus (12) and Chino del Tomate virus (4, 42), have previously spread from Sinaloa into the United States."

[feldon30]

We need Kaspersky Antivirus Tomato Edition.

[dice]

[willow shoots]
Note that willows root from cuttings readily. (I have one in the
yard that I have to prune every fall or spring to keep it from
taking over its area, so I tend to have willow shoots for this
most of the year.)

I was shredding some pruned willow branches and other stuff
for mulch one spring, and I cut off a 2-3' piece of a green willow
branch for a temporary stake for some recently transplanted
perennial. I had to pull it when the stake started growing leaves.

[duajones]

Green Giant got pulled today as it definitely was showing the same signs of interveinal chlorosis as well as stunted new growth. My plants overall dont look as good as they did as little as a week ago. At this point I am wondering if I will even have plants left a month from now.

[barkeater]

I read more from a great plant pathology book by George Agrios to find out if a plant virus can be spread through saving seeds.

Seeds can and do transmit viruses, but TYLCV is so virulent that virtually no fruit or seed make it to maturity so it is not likely to come from infected seed.

In Isreal, TYLCV is so bad tomatoes are grown only under a fine mesh fabric and sprayed to keep the whitefly vector out. There are also many weeds that TYCLV can overwinter on and doesn't kill that whiteflies visit in the spring.

[duajones]

Ok, So I am screwed. At least it appears that way for the future

[dice]

Whitefly control is a hard problem:
http://hortipm.tamu.edu/publications/SPWF.html
(Chemical controls require careful timing and the bugs build up
resistance anyway.)

Biological controls for them are not cheap:
http://www.naturescontrol.com/whitefly.html
http://www.arbico-organics.com/organ...y-control.html

[barkeater]

I googled "TYCLV resistant varieties" and found a list of TYLCV tolerant commercial varieties and vendors on the LSU website.

However, I just went to the 3 company web sites and it looks like they only sell commercial quantities like 5000+ seeds.

[feldon30]

And I'm sure they are delicious.

I guess just hope it was a freak thing this year and continue to grow backup plants and plant as many plants as you can possibly in different garden beds around the yard.

I'm hoping it's just an isolated incident.

[duajones]

Originally Posted by barkeater

Seeds can and do transmit viruses, but TYLCV is so virulent that virtually no fruit or seed make it to maturity so it is not likely to come from infected seed.

So this means I cant save seeds from my plants this year?

[barkeater]

Duane,

I'll quote my textbook concerning virus transmission through seeds:

"More than 100 viruses are transmitted by seed to a smaller or greater extent. As a rule, only a small portion (1-30%) of seeds derived from virus-infected plants of only some hosts of the virus transmit the virus."

The book doesn't specifically address whether TY is in that group, so the website you quoted saying it is not transmitted through saving seeds could very well be true.

Also, concerning alternate hosts for TYLCV, it infects tobacco and other solanaceae weeds, especially the genus datura, which includes jimsonweed and desert thorn-apple.

So, if you have plants that grow to full maturity and show no signs of TY when you pick fruit, I would think them safe. Who knows? Maybe some heirlooms carry the gene resistant to TY!

[dice]

You would not want to save seeds from an infected plant.

What the web site was saying is that you are not likely to
have any ripe fruit from a TYLCV-infected plant to save seeds
from, so whether it would be seed-borne is a moot point. (The
plants are going to be dead and gone long before seed-saving
from them would be an option. Even if you did not pull them,
you would not likely get mature, ripe fruit from a TYLCV
infected plant.)

[duajones]

I got an email response from A&M this afternoon, but there was no diagnosis or recommendations. Just my personal info and the specialists name that is handling my case. I don't understand, maybe its just an acknowledgment of receipt of the plant sample.

[dice]

maybe its just an acknowledgment of receipt of the plant sample.

That seems likely. It probably takes a little while to schedule
a test and actually do it.