Tomato Spotted Wilt Virus (w/ Pix) - Page 25

barbamWY · August 13, 2020

Tswv is hitting me hard. I've been spraying every week with alternating insecticides plus have 12 yellow sticky traps that I have replaced for the second time. I've pulled at least 30 plants with about 20 plants left. Is it safe to use saved seed? I received some of Carolyn's last seed. I love Dikovinka and saved some of the first ripe tomato seeds. Inshir Rozovyi and Viva so far look okay but still green. I ordered and tried Slava this year and it seems to withstanding the onslaught. Mountain Magic didn't make it.

b54red · August 18, 2020

I've got a couple of more bells that need pulling due to TSWV after pulling one last week. I'm not worried about the tomatoes any more because most of them are pretty worn out and near the end unless I want to spend a lot of time and effort getting them back to making a few tomatoes. TSWV has not been too much of a problem with my tomatoes the past month because I have been spraying them regularly for spider mites and I think it has lessened the thrips infecting them.

Bill

atilgan · September 20, 2020

Every single tomato in our community garden is infected like this. It is on leaves as well as on stems. Is it tswv

atilgan · September 23, 2020

Here some more pictures

b54red · September 23, 2020

It sure looks like TSWV. Are the new blooms dying or dead? Is the top new growth looking like it is burned around the edges of the leaves?

If all your plants have it then there is no need to pull the plants if they have some healthy looking tomatoes on them. Let them start to ripen and by then the plants will probably start dying or wilting from the top. If what you have is TSWV it is very rare for a plant to continue producing new fruit although I have had it happen to a few and they held on for months with very slow production and smaller fruit; but usually it is only a matter of a few weeks at most before the plant starts dying after showing the rust like appearance in the leaves.

Bill

atilgan · September 24, 2020

Thank you for the explanation. I had cut the top to prevent it from spreading but it did not work

b54red · September 26, 2020

Quote:

Originally Posted by atilgan

Thank you for the explanation. I had cut the top to prevent it from spreading but it did not work

Once the plant is infected there isn't anything that I have tried or anything that I have heard of that slows it down or stops it. I have tried both removing plants immediately upon spotting the disease and leaving them in place until they die or wilt totally. It doesn't seem to make any difference in whether or not I got more infections on clean plants even the ones right next to each other. It must not spread very easily other than through the thrips that infect the plants initially and there doesn't seem to be any way to stop them from doing so when they show up. TSWV cases seem to come in waves at different times with usually the heaviest infestation early in the season and with lighter cases popping up from time to time over the whole season but that could just be my experience with the disease and it also could be my location.

The only effective thing I have found that has so far assured me of a productive season despite the ravages of TSWV is to plant far more tomatoes and peppers than I need and just remove the sick ones when it strikes. It can leave some very gappy rows at times of heavy or frequent infections of TSWV and at other times I end up with way more tomatoes than we can deal with in seasons where TSWV is not as pervasive as usual down here.

Bill

Fusion_power · October 23, 2020

That may be one of the Tomato Mottle viruses. For practical purposes, they are similar in many ways to TSWV. The only cure is to remove infected plants. Some breeders have been working on mottle virus resistance but are having difficulty getting the gene from a wild species to cross over into a better genetic background.

barbamWY · 5 Days Ago

Can whitefly be a vector? My back garden seems to be worse for tomato growing. I did have raspberry plants move from the other side of the fence and I let them take over a raised bed. It has been a whitefly battle. The raspberries are about 20 feet from my other raised beds. Seriously I am thinking of giving up tomatoes in the back and growing them just in the front. We have a good source of water and I grow tomatoes there on cattle panels.
Thanks,
Barb

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August 13, 2020	#361
barbamWY Tomatovillian™ Join Date: Jan 2011 Location: North West Wyoming Posts: 440	Tswv is hitting me hard. I've been spraying every week with alternating insecticides plus have 12 yellow sticky traps that I have replaced for the second time. I've pulled at least 30 plants with about 20 plants left. Is it safe to use saved seed? I received some of Carolyn's last seed. I love Dikovinka and saved some of the first ripe tomato seeds. Inshir Rozovyi and Viva so far look okay but still green. I ordered and tried Slava this year and it seems to withstanding the onslaught. Mountain Magic didn't make it.

August 18, 2020	#362
b54red Tomatovillian™ Join Date: Sep 2009 Location: Alabama Posts: 6,934	I've got a couple of more bells that need pulling due to TSWV after pulling one last week. I'm not worried about the tomatoes any more because most of them are pretty worn out and near the end unless I want to spend a lot of time and effort getting them back to making a few tomatoes. TSWV has not been too much of a problem with my tomatoes the past month because I have been spraying them regularly for spider mites and I think it has lessened the thrips infecting them. Bill

September 23, 2020	#365
b54red Tomatovillian™ Join Date: Sep 2009 Location: Alabama Posts: 6,934	It sure looks like TSWV. Are the new blooms dying or dead? Is the top new growth looking like it is burned around the edges of the leaves? If all your plants have it then there is no need to pull the plants if they have some healthy looking tomatoes on them. Let them start to ripen and by then the plants will probably start dying or wilting from the top. If what you have is TSWV it is very rare for a plant to continue producing new fruit although I have had it happen to a few and they held on for months with very slow production and smaller fruit; but usually it is only a matter of a few weeks at most before the plant starts dying after showing the rust like appearance in the leaves. Bill

September 24, 2020	#366
atilgan Tomatovillian™ Join Date: Aug 2012 Location: Turkey Posts: 23	Thank you for the explanation. I had cut the top to prevent it from spreading but it did not work

October 23, 2020	#368
Fusion_power Tomatovillian™ Join Date: Feb 2006 Location: Alabama Posts: 2,154	That may be one of the Tomato Mottle viruses. For practical purposes, they are similar in many ways to TSWV. The only cure is to remove infected plants. Some breeders have been working on mottle virus resistance but are having difficulty getting the gene from a wild species to cross over into a better genetic background.

5 Days Ago	#369
barbamWY Tomatovillian™ Join Date: Jan 2011 Location: North West Wyoming Posts: 440	Can whitefly be a vector? My back garden seems to be worse for tomato growing. I did have raspberry plants move from the other side of the fence and I let them take over a raised bed. It has been a whitefly battle. The raspberries are about 20 feet from my other raised beds. Seriously I am thinking of giving up tomatoes in the back and growing them just in the front. We have a good source of water and I grow tomatoes there on cattle panels. Thanks, Barb