If the purpose of the bait is to smell bad. Can you put a piece of screen
over the bait cup. This would let the odor out, but not let the flies in to
lay eggs.


"Bob Engelhardt" wrote in message
...
Dave wrote:
The bait in the trap is a foul broth, the stench of which attracts the
flies, and maggots can always be seen living in it.

But the bait isn't actually _in_ the trap - it's underneath. Once a fly
is _in_ the trap, it can't lay it's eggs in the bait. Bob