Foliage disease, what is it?

DanishGardener · April 21, 2010

I first though that this was oedema, but i'm not sure anymore. Maybe someone can tell me?
For some reason, it is mostly attacking the potato leaf plants.

Dice suggested that I should spray them with a hydrogen peroxide solution, I think I will try that.
Any other suggestions on what to do?

amideutch · April 21, 2010

See if your garden center carries any products containing Azoxystrobin. Also you can dissolve a aspirin tablet in a couple litres of water and spray the leaves with that. Ami

RonnyWil · April 23, 2010

Are your leaves starting to look like these? Just about all 48 plants I have in the ground are starting to exhibit these symptoms. I can find no pests. I have another 200 plants in cups on a shade table and none have this on them. I was going to take a closeup shot but the camera started to malfunction.

dr20s · April 26, 2010

the leaves in the first pictures-DanishGardener- are insect related, probably spots from spider mites (where they feed on cell tissue and create those bumps on the underside of leaves where they hide and - discolored areas on leaves ) not a physiological disease- they thrive in dry climates, such as Arizona, Texas. They usually decrease with higher humidity and some rain.

http://www.plantanswers.com/tomatoes_spider_mites.htm
http://www.badspiderbites.com/spider-mites/

cyber5 · April 28, 2010

Hmmm... I am in Phoenix, AZ and I seem to have the same thing. Doesn't look like any of the pictures of common diseases I've seen around the web. Rather than paste photos here - how about you see them in full-res over on my blog where I have documented the entire process from ordering heirloom seeds through today when I took the pics resembling very much like what Ronnywil has posted, and a bit like Danishgardener's.
Hope someone has good news for us.

chalstonsc · April 29, 2010

Ronnywil,
Your pics remind me of the vicious flea beetle attacks I had last year, but you should be able to see them on the leaves or flitting about your plants, best seen by me in the evening when plants were out of direct sun. If you think that is a possibility, you could try dusting with some diatomaceous earth, which I found most effective, but had to be used religiously. Smearing some vaseline on something white, placed near the plant will attract and trap some of them for identification.

RandyG · April 29, 2010

RonnyWil,
You have flea beetles. They are generally worse in the spring when the weather is cool.
Cyber5,
You have severe thrips damage. I can see one in the 3264 image. The black dots are excrement from the thrips. Just hope they are not carrying TSWV.

DanishGardener,
I vote for oedema on yours. Are there any conditions such as high humidity which would intensify this problem?

desertlzbn · April 29, 2010

I am not sure what is going on here:

Here is a pic of the whole plant:

I thought it was insect damage, I was finding a lot of knats and what seems like aphids on the plants. Now I am not too sure if it is not some kind of virus or blight?

RandyG · April 29, 2010

Cyber5,
I should have said your imagep4272027. The thrips is plainly visible at the upper left of the leaf when you focus in. You can even see its eyes. There are some others on this leaf also that are not in focus very well.

Duh_Vinci · April 29, 2010

Quote:

Originally Posted by RandyG

RonnyWil,
You have flea beetles...

Agree 100%, see this every year, that's why I usually leave the lower leaf branches on until the plant is about 2-3' tall, "sacrificial leafs"... By that time, those ugly little things jump over to eggplants and leave my tomatoes alone, that's when I clip the lower, drilled to no end branches.

Desert - that does look like an early blight, anyone else can confirm?

Regards,
D

RonnyWil · April 29, 2010

Thanks guys. I have had aphids and the occasional horn worm but the flea beetles are a first. I don't spray for insects until I have to and then it's pyrethrin or neem oil. I pruned most of the damaged leaves which turns out were the lower older stems anyway. I gave them a good spray with peroxide and then sprayed them with pyrethrin and rotenone. I prefer pyrethrin alone but all that was available was pyrethrin with rotenone so they got a good spray of it. So far no new damage.

April 21, 2010	#2
amideutch Tomatovillian™ Join Date: Feb 2006 Location: Germany 49°26"N 07°36"E Posts: 5,041	See if your garden center carries any products containing Azoxystrobin. Also you can dissolve a aspirin tablet in a couple litres of water and spray the leaves with that. Ami __________________ Life's journey is not to arrive at the grave safely in a well preserved body, but rather to skid in sideways, totally worn out, shouting ‘...Holy Crap .....What a ride!'

April 26, 2010	#4
dr20s Tomatovillian™ Join Date: Jul 2008 Location: wisconsin Posts: 8	the leaves in the first pictures-DanishGardener- are insect related, probably spots from spider mites (where they feed on cell tissue and create those bumps on the underside of leaves where they hide and - discolored areas on leaves ) not a physiological disease- they thrive in dry climates, such as Arizona, Texas. They usually decrease with higher humidity and some rain. http://www.plantanswers.com/tomatoes_spider_mites.htm http://www.badspiderbites.com/spider-mites/ Last edited by dr20s; April 28, 2010 at 03:12 PM.

April 29, 2010	#11
RonnyWil Tomatovillian™ Join Date: Feb 2007 Location: Collierville TN Posts: 106	Thanks guys. I have had aphids and the occasional horn worm but the flea beetles are a first. I don't spray for insects until I have to and then it's pyrethrin or neem oil. I pruned most of the damaged leaves which turns out were the lower older stems anyway. I gave them a good spray with peroxide and then sprayed them with pyrethrin and rotenone. I prefer pyrethrin alone but all that was available was pyrethrin with rotenone so they got a good spray of it. So far no new damage. __________________ I'm two days older than dirt and I like to play in it.

April 28, 2010	#5
cyber5 Tomatovillian™ Join Date: Apr 2010 Location: Phoenix, AZ Posts: 5	Hmmm... I am in Phoenix, AZ and I seem to have the same thing. Doesn't look like any of the pictures of common diseases I've seen around the web. Rather than paste photos here - how about you see them in full-res over on my blog where I have documented the entire process from ordering heirloom seeds through today when I took the pics resembling very much like what Ronnywil has posted, and a bit like Danishgardener's. Hope someone has good news for us.

April 29, 2010	#6
chalstonsc Tomatovillian™ Join Date: Jan 2007 Location: sc Posts: 339	Ronnywil, Your pics remind me of the vicious flea beetle attacks I had last year, but you should be able to see them on the leaves or flitting about your plants, best seen by me in the evening when plants were out of direct sun. If you think that is a possibility, you could try dusting with some diatomaceous earth, which I found most effective, but had to be used religiously. Smearing some vaseline on something white, placed near the plant will attract and trap some of them for identification.

April 29, 2010	#7
RandyG Tomatovillian™ Join Date: Apr 2009 Location: western North Carolina Posts: 84	RonnyWil, You have flea beetles. They are generally worse in the spring when the weather is cool. Cyber5, You have severe thrips damage. I can see one in the 3264 image. The black dots are excrement from the thrips. Just hope they are not carrying TSWV. DanishGardener, I vote for oedema on yours. Are there any conditions such as high humidity which would intensify this problem?

April 29, 2010	#8
desertlzbn Tomatovillian™ Join Date: Mar 2009 Location: Tucson Posts: 659	I am not sure what is going on here: Here is a pic of the whole plant: I thought it was insect damage, I was finding a lot of knats and what seems like aphids on the plants. Now I am not too sure if it is not some kind of virus or blight?