Re: osb board (plywood type of wood) ok for nuc's and swarm
Short term maybe for swarm traps like the "cardboard" traps. Different grades of it. I wouldn't use it for nucs unless well sealed on the cut edges and painted. My opinion which according to my wife may be wrong .
"OSB has a tendency to swell on the edges when exposed to water, but it resists humidity well compared to plywood" [source: University of Massachusetts].