There is (or used to be) a poison that was micro-encapsulated.  You
mixed a powder or paste with an appropriate bait.  The offending
critters carried it to their nest where it was released during digestion
resulting in a dead colony.  Great for yellow jackets when mixed with
tuna.  Anyone know of a source?

Logan

String & Linda Monteith wrote:
>
> We have had serious problems with yellow jackets trying to get into the
> hives (only in the fall).