My Mann Lake hives have no top entrance. Some of my supers do have a drilled in hole allowing for another entrance. To answer your question though, honestly I do not know. In theory I would imagine it would but then your whole hive will have to reorient to the top entrance. After they adjust, I would think most of the bees would fan pheromone (and inadvertently the smell of honey) from the top entrance which might negate the bottom screen. The whole idea behind the robbing screen is that robbers are so interested in just following the smell of honey (coming through the screen) whereas the bees belonging to the hive follow the pheromone trail left behind from the bees that know how to get around the screen.

I would imagine that wasps would follow pheromone trails the same as honey bees. I never noticed any making their way in when I had my screens in place.

Glad it worked well for you; the thumb tack is a good idea (cheaper too)!

You’re welcome! Thanks for the kind comments.

Glad I could help.