duckypaddler--Your post reads (at least to this one example of mountain folk) as if antimycin doesn't kill insects. It is my understanding that it pretty well wipes out everything in a stream (crayfish, spring lizards, as we mountain folks call salamanders, Devil's knitting needles, a.k.a. know as snake feeders, and insects in general. Is that a misconception? Also, I mentioned some of the inhabitants of mountain streams by their colloquial names just to make a point that we mountain folk, say what you will about our lack of scientific understanding, have a real knack for using descriptive terms. Even the slowest of woods colts would know that (and if you know what a woods colt is I'll give you full marks, betting, as I mention the term, that there are those of lurk in these precincts who will know).