I was going to post this in the Equipment Section...
I've been thinking about going to migratory lids for the hives and have some concerns about upper entrances and shb. I am currently using screened bottom boards and have yet to see a beetle anywhere but the top of the hives. When I use a solid bottom board they are everywhere and I have lost every solid bottom hive to shb in the past year (6 so far). Other than nuc's I am all screened now. I lost one hive three weeks ago that was screened bottom board and am setting traps in the last three hives and trap out.
To the point or question is; I have a trapout with a nuc right now that I used window screen to cover the feeder/vent(?) hole in the inner cover. I have experimented with feeding and it doesn't SEEM to hinder access to a jar. Since I prop my lids for ventilation, unless it's a top entrance hive, do you think the screen will be enough to keep the SHB from accessing the hive that way? Or do you think they may still squeeze in?