One can only wonder at the overall damage to insects and the ecology caused by the widespread use of pesticides.
I've noticed large numbers of butterflies on my compost pile, especially hackberry butterflies. I started putting out mashed bananas and their peels as an extra food source and have attracted many more including commas, red admirals, and an elegant hairstreak.
What I've notice is a disturbing percentage of butterflies with malformed wings, not ragged, but malformed either from genetic mutation or from some problem at the pupal stage. There was a comma with almost no hind wings that has been feed at the pile for a week.
Comma butterfly so name for the white comma on the underside of the hind wings--lower picture.
Hackberry butterfly