Something ate part of a single yellow mini-Catt flower but I'm quite
sure it was a slug. Japanese beetles love my grape vines so much, they
pay no attention to the orchids. Maybe that's you answer; plant grapes
near by.
Seriously though, I just normally bring summer blooming plants indoors
as the buds begin to open. I see the flowers more often indoors and a
few weeks of dim light doesn't seem to harm the plants at all.

Steve

That's an idea, you may try a trap baited with fresh fruit or a
chemical lure set a distance away from your orchids. If you can move
them 50 feet or so and keep them somewhat confined then spray or
slamming the lid may help with the control.

Nancy