Thanks, I have been planning to do a screened oil tray, but haven't had time to build one... plus have a little confusion about screen size etc...
Most of the articles I saw gave a range of aperture size ... and haven't had time to find out what is available now as far as number sizes and wire gauges.
Also, many articles seem to say "aperture" when they mean "on-center measurement" and a couple of them definitely did.
this beetle looks like it might fall through #8 and might not ... #8 has wires spaced 1/8" on centers, so it has an aperture of (0.125" - wire diameter) .. Beetle will definitely fall through the aluminum expanded mesh used for gutter guards, and it looks small enough to keep out bees, but there are sharp edges. I could tumble the stuff in sand, but that would be a lot of trouble.
looking on Amazon, they usually state fractional, number, or millimeter size. The wire diameter is almost never stated. When it comes to the metric stuff, I assume that is on-center measurement, but really don't know.
Haven't put the calipers on the dead beetle yet.... As soon as I typed that, I realized you guys are gonna be laughing at me... oh well..
So what do you buy for mesh that works ? ... or do you all buy ready-made bottoms ?
When I was young, you could get the stuff in different wire gauges, and spacing at a local hardware store ... long gone now.
You could even get it in spacings like 1/8" x 1/4".... went to the co-op looking for that or #6 last week thinking it would work well ...
and the buggers laughed at me and said there's no such thing... Luckily I had a scrap about 1' wide of 1/8"x 1/4", so I went back down there to show them. All they have locally is too big.
Assuming it needs to be metal because bees may chew on it ?was also thinking of making a thing out of sheet metal like a miniature version of a termite shield for the bottom of the brood box.. That the bees could step over but mites and beetles couldn't. ..Silly idea ? The inner lid has a beetle trap and adjustable vent integrated into it... uses the scent of the hive as bait, just an experiment.