The worms attacking your crops are "corn boring Army worms"
A company called "Trece Incorporated" manufactures traps that kill the moths that lay the eggs that end up worms in your flowers.
I don't have a problem with them, but plenty of people do. You have to put the traps out early in the year, like March, April, May when it's warm and not raining... follow the directions...
Additionally, the moths are are attracted to outdoor lights, however, people that do not have outdoor lights get them too.
Also, most good grow stores sell them