I think they mean "bordeaux mixture". Benomyl is not available anymore, at
least not anywhere I have seen. There are better fungicides available, as both
of these are fairly outdated. I would try and take a piece to you extension
office. Smoke trees are pretty succeptible to verticillium wilt, and this may
be the problem you have. Niether of the above fungicides will do much to
remedy the problem.

Toad