Several contributors mention the use of BT along with their T-22 remarks. Having noticed a marked decline in the populations of agriculturally-harmless species of butterflies over the last 40 years, I'm quite concerned that the prolific use of BT by gardeners and farmers may be damaging the ecosystem far beyond the intended targets. I hope someone figures out a way to study this possibility before we end up with a "Flutterless Spring" paralleling Rachel Carson's "Silent Spring" of missing birds.
I hope so, too, especially because (what I consider) overzealous genetic engineers have inserted the Bt toxin gene into crop plants so that it is now loose in the gene pool. Not only that, the toxin will be present in any foodstuffs that are harvested from such "franken-plants". Some people are already reporting medical problems as a result.
To make things even worse, we as consumers will not be told whether these genetically modified crop products are present in the food we purchase at the grocery store, thanks to collusion between the FDA and Big Ag/Monsanto.