A few weeks ago I got ahold of a local guy selling some osage fence posts. I went out and took a look at them and picked out a few corner posts, 11"+. The guy didn't know anything about building bows and he just threw them in a field and left them. Well I started to tear into them knowing there would probably be some bugs in there. Well there definitely was. A lot of them, eating deep into the heartwood as well.
Any suggestions on how to stop them where they are now? I have heard if you spray the bark with diesel fuel then they won't lay their larvae. I understand this is preventing them, but now that I have them already, what are my options to kill them?