Most chemical co's are still exporting all the real nasty stuff to third world countries. I heard Dursban was going away and timed it just right at Farm and Family, bought all they had , it was $20 a bottle, got it for 2-3 bucks ,can't remember. I think I might have a dozen bottles.
I have lots of wood around, mostly palletized and tarped. My biggest things are species specific bark borers until it is dried. I usually cook the wood in my wood oven before using, sometimes 200 degrees
It just depends on the product. I like em sterilized!! I keep all the sapwood on which is what borers love, and given enough time they will go deeper.