West Sussex,
United Kingdom 
Orchids
My orchid plant has lots of tiny round brownish bumps stuck all over the leaves, which I think are some kind of bug. A couple of green leaves have just come away at the base. Does anyone know how this bug operates? Does it attack the roots as well as the leaves? I have wiped off the bugs, if that's what they are, and sprayed with a bug killer but is there anything else I should do please, eg should I repot the plant?
23 Apr, 2012
Answers
Could be scale insects. I dont think bug killer is much good for getting rid of them, I think you are best rubbing them off when you see them. I had them on a lemon tree and it was a devil of a job to clear them.
24 Apr, 2012
Previous question
I didn't have a clue but did a google and came up with 'bacterial brown spot' could this be it?
See here; http://www.staugorchidsociety.org/culturepests-diseases-pseudomonas.htm
23 Apr, 2012