Container Tomato Plants

How Much Copper Sulfate to Kill Blight Spores

Anonymous added on May 16, 2016 | Answered

I use 12 gal. containers in a greenhouse 17 x 20' screened sides, glass roof, 50% opened. Center 5' glassed year round. I read about spraying copper sulfate on the soil, letting it dry then watering it in to kill blight spores. I have blight. Should I remove all tomato plant roots? How strong of a solution should I use? I have a small 1 qt boiler I could attach to a 3/8" rod with holes and could push it into the soil and force the steam into the soil. How far apart would the penetrations have to be and how long would I leave the rod at each location to kill the spores? This seems very labor intensive.

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Answered on May 17, 2016
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