I've done a lot of weed spraying over the last month (mostly 2,4D on burdock, poison ivy, other invasive weeds around the farm). I was starting to wonder if the old spray I used was any good, then the rain came last week. Boy, did things turn brown after the rain! /forum/images/%%GRAEMLIN_URL%%/smile.gif
Check your fields. You might have got a better kill than you thought.