Howdy Everyone
Does anyone have experience with vanda leaf spot or "Thai disease". I can't find much info online other than it's a series of purple spots with diamond patterns and it's caused by the fungus Guignardia. I am looking for fungicides that can control this particular fungus and are safe for orchids. Any ideas? I have Halt and Aliette but the labels don't mention they control this fungus.
I threw two ascocenda hybrids in the trash today because they were heavily infected but the rest of the vandas may have spores in them.
http://www.doacs.state.fl.us/pi/enpp...circ/pp258.pdf