When I worked in Kenya many years ago, I visited a small farm where they processed chrysanthemums for use as a natural pest killer. I vividly remember the powerful, not unpleasant smell rising from the mesh shelves where the flowers were drying in the sun.
You'd think a pesticide based on flowers would be harmless, right? The promoters of synthetic pyrethroids — which mimic the natural pyrethrum extracted from chrysanthemums — certainly want us to think so. But once again, the latest batch of "safer" pesticides are not as harmless as we thought, and pose particular risks to children. Unfortunately, EPA seems to be turning a blind eye to emerging evidence, and is poised to open the floodgates to more pyrethroid products and uses.