hey, when the larvae do end up in oil/ving traps, it doesnt kill them, once i had so many in one trap i left it on the cement for the ants to devour, i came back the next day and they were still trying to make a run for it, that was larvae 4 days in oil,, they are tougher than the adults,, i got some really really good advise today from a pro,, he said if you have lots of shb in your hive, oil traps wont be enough for a quick clean up, he suggest to you cut 6 good size peices of cardboard to completely cover the top of your (HONEY) frames and use a seringe to insert a few ml of pure vinager,, leave it for half a day,, (no more) and then remove the peices STRESS>dont tip them on their sides, keep em vertical, and immediatly soak them in either oil or diesel or bicarbasoda/water, after u have done this with your honey super, drive the bees down, then remove your super for a few hours and do the same with your brood frames.. he told me that in one box using this method, he cleaned out over 400 adult beetles, he said he froze the frames and kept them for winter stores (which is quite smart really) and replaced with 9 stickies the following day,, and now the level of infection is extremely minimal.. i havent tried this yet but i will be doing so this coming weekend, ill let you know my results, but this guy knows his stuff and really is quite intellegant, so yer, try that i think, no chemicals, no materials, effective clean up :P