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Thu, Jul 29, 10 at 8:17
| 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 |
Follow-Up Postings:
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| 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. |
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| 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 |
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