Alternaria Solani: Early Blight on my Tomatoes

Early Blight Has Attacked My Tomatoes

Alas, my tomatoes have been infected with early blight caused by the fungus Alternaria solani (or tomatophila).  I had it last year but had it controlled.  It is quickly moving up my Sungold tomatoes.  I am spending a lot of time in the garden cutting off infected leaves and stems. In this picture taken a week ago,  you can’t really see it but it has gotten worse.

So Far The Brandywines Are Not So Affected

The Sungolds, which are a Alternaria Solani: Early Blight on my Tomatoeshybrid have the blight quite badly.  It is amazing how many leaves you can cut off and still have nice tomato plants.  The picture to the left is only one batch of dead leaves that I have removed.  It has only just started to affect the Brandywine tomatoes which are heirloom tomatoes.  I have been using lots of compost as mulch, seaweed and milk foliar spray, Ocean Solution foliar spray and worm tea.  Though I have just discovered that my worm tea might be too old and the microorganisms might have died.  I let it sit too long.

Today I Carefully Brewed Some Worm Tea

So today I made up some new worm tea from my worm compost.  I filled a bucket with water and let it sit overnight so the chlorine would dissipate.  Then I added some sugar for food for the micro-organisms and stirred it throughout the day to incorporate more oxygen.  I am really winging it because you need a bubbler for the oxygen which I don’t have.  I will spray and water my plants with this and hope it helps.  I am one very frustrated organic gardener right now!  Any suggestions or magic organic cures would be much appreciated!

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3 thoughts on “Alternaria Solani: Early Blight on my Tomatoes

  1. Dianne Sipniewski

    If you have found an organic solution for Alternaria solani please let me know. We are having the same problem. Thanks

  2. Sandie Anne Post author

    Hi Dianne,

    I was just in a little “country-like” gardening store and was discussing Early Blight with them. They said the best thing to do is not to plant tomatoes in that area for 3 years. I have also read that heat kills the fungus. So if I manage to find another place to put my tomatoes I will also cover that area with black plastic to heat up the soil because the fungus lives in the soil.
    Sometimes gardeners have little space and are not able to rotate their tomatoes.

    They also said keep your plants strong. So I bought some fish emulsion combined with seaweed and I am watering the plants with that. I also use it as a foliar spray.

    The interesting thing is that I am still getting lots of tomatoes. A lot of leaves have died but the plants are still growing fine at the top and the tomatoes already formed are still ripening.

    Thanks for the comment and keep me posted!

    Sandie Anne

  3. Sandie Anne


    All the literature says to plant your tomatoes in a different place next year because the Alternaria Solani fungus lives in the soil. Containers would work also and you could fill them with sterile potting soil.

    Are your plants spaced out? They need to have air circulation.

    Sandie Anne

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