Cabbo , I have been testing "Ed Rosenthal's Zero Tolerance" it is a pesticide and fungicide. I have yet to try it as a fungicide, but I have heard it is great for that use in orchids. I have tried it as a drench diluted at about 40% Z.T. and 60% water to kill white flies and there eggs in the potting media. I have not noticed a bit of damage or slow down in my trial orchids. I am going to be testing it on my leaves this weekend. The best part is it's herbal and safe around pets and children. Oh, and it smells GREAT!
Some of the chemical alternatives are Thiram or Captan. These are commonly used with commercial orchid growers. One advantage that Z.T. has is pests don't become immune to the herbal compounds. So, you can do your pesticide and fungicide at the same time. Less chemical, less cost, less time!
Best of luck,
Phrogz3
Last edited by Phrogz3; 02-07-2009 at 10:56 PM..
Reason: added info
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