i wouldnt buy the traps, i hear they work to well, you will be getting your neighbors beetles as well, from miles around. so if you do get the traps be prepared to buy lots and lots, i know people who tryed it and ended up with even more j-beetles cause it atracts them from miles around.
i just flick em in soapy water, bringing in benifical bugs help in a big way. wasps, praying mantis, ground beetles,ect,
i always wanted to try the milky spore! herd its good for getting rid of grubs to.