Another use for the tree is that green leaves from it, sprinkled all in a dog pen, will run fleas far away.
I once sterilized a small lake with rotenone, before restocking it. It's an amazing substance. There is a common misconception that it is some type of poison. It is not. What happens is that, when dispersed through the water, which happens extremely quickly, it coats the gills of fish and other creatures with gills, and they quickly suffocate because they can no longer remove oxygen from the water. Best way there is to rid a lake, or pond, of shiners before restocking.
SRH
