Nah, has been thrashed out many places.
Problem is, without cropdusters, there won't be a cotton crop this year.
(And various other things they do, they stay very busy this time of year).
So the cotton farmers go under. And the pilots with the cropdusters.
But of course, its a problem - but more of a problem would be a *regular* plane dumping something (its not as obvious as a cropduster, for one).
Disruption of the water supply is far easier, and causes a lot more hardship.
I've still go a couple other ideas, but as before, I'm not saying them.
Nothing personal, but I think they're ahead of ya. :)
I really don't think you're capable of being mean enough to formulate a really, really, good terrorist plan. :)
Addison