Ronn,
I think (I won't say positive !) that you are just fine and have nothing to worry about. Here's why:
1) Bugs like to chew on nice wet wood that is at least a bit pliable. Once it is dry I think that is an evironment that they just don't like.
2) Saw blades hurt bugs...BAD! The sawing process would likely eliminate a lot of them.
3) I import for India, all of the wood I get from there is indeed fumigated, I don't know the protocol for other countries but if it comes into Canada it has to come with a fumigation certificate our the government becomes the owner
.
4) I have the most experience with spruce. All of the bugs live in the sap wood so I just cut that off and it becomes firewood, you guys don't want church door figure on your tops anyway. But this restricts the area of concern on a board. I have noticed on my hardwoods that the hole seem restricted to the out edge of the plank also.
Lastly, if you are really concerned (I don't think you need to be)just fumigate it yourself. Build a little box, place it on saw horses out side, put your wood in, get the appropriate Raid or other chemical, shoot a load in the box, close it up and leave it for while.
Hope that helps!
Shane