Ants? Thrips? Fleas? Regardless, one treatment will generally not solve
the problem -- few if any insecticides are effective against any of the
critters in all their stages. Anytime you have bugs, you should expect to
spray 3x at appropriate intervals, so you kill the adults, the teens and the
children ...
--
Kenni Judd
Juno Beach Orchids
http://www.jborchids.com
wrote in message
oups.com...
Hi, I'm new to this group.

I have a conservatory attached to my house with about 60 orchids. Over
the past year or so, I've noticed bunches of tiny black dots - smaller
than a pinhead - that cluster on the ledges and walls. The largest
concentration is on the wall opposite where my plants are. I *do* have
a few plants that have tiny black spots on the leaves, but the spots
are flush with the leaves unlike these things. Can anyone tell me what
these may be and how I can get rid of them? I did a massive cleanup,
but they reappeared 2-3 weeks later...

Many thanks,
Laura