Daconil and Early Blight

otomato-oJuly 29, 2010

I have early blight on a good portion of my heirloom tomatoes, very prevalent this year in illinois due to the weather conditions. I started using daconil, a fungicide, every few weeks to help me slow the fungus and I do think it helps.

My question that I can't seem to find the answer to is how long after treating the plants, can you safely harvest and eat the fruit? 3 days? a week?

ruth

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jean001(z8aPortland, OR)

It should be on the label as either "PHI" or the words "pre-harvest interval" which is the number of days or weeks you must wait.

    Bookmark   July 29, 2010 at 9:33PM
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torquill(z9/sunset15 CA)

Daconil has no pre-harvest interval for tomatoes; this information sheet from University of Wisconsin lists the pre-harvest interval for all products containing chlorothalonil as 0 days when applied to tomatoes. It's fairly inert and doesn't get into plant tissues at all; it just acts as a physical barrier against fungal penetration.

If it eases your mind at all, the toxicity of chlorothalonil is really, really low in mammals, lower than many organic treatments like sulfur; even if you eat a little by accident, it won't hurt you. So just wash the fruit before you eat them, and follow any other label directions.

--Alison

    Bookmark   August 10, 2010 at 1:04AM
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