yeah all it takes is one growing in the ditchbank or next door for everybody and his brother to get them. i like to mow them right before a rain. i've heard (and this seems to work on SOME) that if you mow them right before it rains the rain collecting in the stalk will cause them to rot. Anyway, i'm mowing all i can reach right now and going crazy with a machete on the rest. will spray the survivors when fourwheeler gets fixed (dad ran over it with tractor).
biggest weeds here are thistle, horsenettle, pigweed, persimmon trees, briars, and dogfennel.