This is a tree question rather than gardening, but it's not clear what forum it belongs in so:
We have bronze borers in our 2 white birches. I got a price from a tree place that was very expensive. They were going to spray mert around the base and root area of the tree. Any recommendations on where to buy merit so I can do this myself, or is there a better chemical to use for this? I read the MSDS and it seems like pretty nasty stuff, but I've handled insecticides and have enough protective gear to feel comfortable.