I purchased a blue and a yellow insect sticky trap card at the Australian Orchid
Conference a few weeks back at a cost of $1 each. I have had the traps hanging in my shade
house for about four weeks now. The traps now have many flies and bugs attached. The traps
seem to be very effective, although I am not sure what all the flies and bugs are or if
they are doing any damage to my plants. (The yellow card has been more effective than the
If you would like to try them, here is the information about them.