My tomatoes are getting sick

[Lastfling]

Hopefully someone has a diagnosis as to what I'm dealing with.

I did spray with bleach solution last night in time for the rain 😫, and again a short while ago. They were also treated with Mancozeb about a week ago.. Red Barn - both plants- appears to be taking it on the chin while Grightmires Pride is running a close second. Others either show some or little sign at very bottom of plant

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[Lastfling]

Here are some other pics
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[Cole_Robbie]

It looks like Septoria to me: http://www.missouribotanicalgarden.o...of-tomato.aspx

[MissS]

I agree with Septoria Leaf Spot. If you are going to get something this is the easiest one to control.

http://www.tomatoville.com/showthread.php?t=15489

[b54red]

I have never found Septoria to be easy to control down here especially during the heat of summer and afternoon showers.

Bill

[ginger2778]

Septoria for sure. Cut off the bad leaves, bag them and remove from your garden, then spray with liquid copper fungicide, at the WEAKEST recommended dose. Be sure to be thorough about wetting the leaves under snd over, and the stem down to the soil line.
Thats a bad infection, so I would repeat in 7 days, then every 7-10 days as a preventive, and also after a heavy rain.
It works really well, but caution, it's strong stuff, which you need, but more is not better. If you have blue color on the leaves, it is too strong and may stunt new growth. It will take the plant 3 weeks to grow out of, so go with the weakest recommended strength. That will be plenty.

[Lastfling]

Thanks everybody, I'll stop by Southern States on the way home this afternoon and get some liquid copper fungicide to add to the arsenal. Also, thanks for the links. Based on what I've read, I appear to be headed in the right direction. Hot, humid conditions are definitely the environmental factors I've been dealing with for the past month. Rain though has been extremely limited at my house.

[gorbelly]

Originally Posted by ginger2778

It works really well, but caution, it's strong stuff, which you need, but more is not better. If you have blue color on the leaves, it is too strong and may stunt new growth. It will take the plant 3 weeks to grow out of, so go with the weakest recommended strength. That will be plenty.

I use Bonide organic copper at the recommended dose of 1 tbsp/quart. Sometimes, there is a blue tinge to the leaves, especially where it has pooled while drying. This is my second year using it, and I've never had any problems with stunted new growth on my plants.

There are different kinds of copper formulas, though. Perhaps the non-OMRI ones do cause this problem.

Of course, the Bonide copper does not stop septoria--only slows it down and helps to prevent.

[Lastfling]

I bought the Southern Ag Liquid Copper last night and applied at weakest solution which was 3Tbsp per gallon. Also pulled a trash bag full of diseased leaves from the plants.

[wildcat62]

I normally use 4Tbsp per gallon.

[ginger2778]

Originally Posted by Lastfling

I bought the Southern Ag Liquid Copper last night and applied at weakest solution which was 3Tbsp per gallon. Also pulled a trash bag full of diseased leaves from the plants.

Uh oh- better read it again, its 3-5 teaspoons per gallon, you just applied it 3 times as strong (300%). The abbreviation is Tsp at the top of the column. I would rinse it off the new growth and blossom areas, you will be toxic to the new pgrowth at that concentration.
BTW- Southern Ag is the brand I use, its very good, but extra concentrated compared to other liquid coppers. Here's a link to the PDF: http://southernag.com/wp-content/upl...Copper-Gal.pdf

[ginger2778]

Originally Posted by wildcat62

I normally use 4Tbsp per gallon.

Then you are using it 400% stronger than you should, if you are using the Southern Ag brand. Ever get scrunched curled leaves in the new growth? It will happen in susceptible plants. Then it takes the plant 3 weeks to recover so you lose 3 weeks of growth.
I used to use it stronger, got the stunting, tried it at the weakest recommended dose, it worked perfectly, no stunting.

The way it works, it ruptures cell proteins, and enters the plant through its leaf openings, the higher the concentration, the more cell toxicity takes place. But thats why its effective against both fungi and bacteria. I HAVE LEARNED THIS THE HARD WAY.

[b54red]

I think Ginger is right because I use that brand also but I usually only use 2 tsp per gallon and it works pretty good at that rate but it might take more for a bad case of Septoria. I have also experienced stunting with the highest dose recommended and it does take a while for them to recover so you might want to rinse off the new growth like Ginger says. I have also used the diluted bleach spray at the stronger solution but only on the lower leaves that are affected by Septoria and then followed a few hours later with the copper spray.

Bill

[Lastfling]

Well, keeee-rap, here's hoping it rains today, as no chance of washing them off before this evening, which would be a solid 24hrs after application.

[ginger2778]

Hahaha.
To be honest, I only use 1.5 Tablespoons for my 3 gallon sprayer but didn't want to complicate you all life by saying 1/2 of the weakest recommended dose.