something attacks my tomato plants..

[atikot]

Hi, there's a weird thing appeared at my tomato plant lately, first it's was just on one plant but quickly it's attacked the other tomato plants I have. It's looks like some parasites , but maybe it's kind of a disease?

https://img819.imageshack.us/img819/9306/img20120713wa0002.jpg
https://imageshack.us/photo/my-images/198/img20120713wa0000.jpg/

Does someone know what can it be? And how to deal with it?

Thanks in advance

[rainbowgardener]

Septoria, fungal disease.

Remove all the badly infected leaves and then treat the rest of the plant, by spraying (being sure you get the undersides of the leaves) with one of these plant anti-fungals:

A baking soda solution with a little bit of soap added (a table spoon of baking soda in a gallon of water with a few drops of soap).

Or 3% hydrogen peroxide straight from the bottle or Neem oil or compost tea.

Or milk diluted 50% with water and allowed to stand a bit to culture the lactobacillus.

Commercially available plant fungicides: Remedy (from Bonide) is potassium bicarbonate (the baking soda above is sodium bicarbonate). Or Serenade, which contains a naturally occurring bacterium called Bacillus subtilis, which works against many types of fungi.

Also spray all your healthy plants to help ensure that they don't get it and spray or drench the soil around the plants.

[jeffreyrich56]

This looks like Bacterial Leaf spot or Antracnose, the hydrogen peroxide recomendation is a good one. I like useing Oxidate Ready to Use it has the peroxide chemistry in it and enouph not to burn your leafs.