http://www.regional.org.au/au/asssi/...vanzwieten.htm
This article made me rethink my use of copper. I have a very healthy worm population because I have been feeding the soil for almost 2 years now. I hauled in over 3k pounds of manure last winter, and do so every fall so I certainly dont want to poison my soil with heavy metals and defeat the purpose of doing all that work. Everything I do is based around soil building since that is really the cornerstone of a healthy garden, and since there are several alternatives that work as/more effectively I will no longer use copper fungicide. Not worth the risk for me. To each their own though.