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Originally Posted by kindrag23
Also the website that I viewed suggested physon 20 for almost all of the issues it had. or Copper compound?
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Your copper compound would be Phyton 27 and it is systemic. Follow all label precautions, especially rubber gloves while mixing it and avoid breathing in mist when spraying.
Physan 20 is great as a general disinfectant for tools and bench surfaces, but it is topical and does not penetrate plant leaves. It does have some usefulness, such as preventative treatment of freshly deflasked seedlings.