Repelling False Milkweed Bug

My mom has been having problems with false milkweed bugs killing her Shasta dasies and false sunflowers.  False sunflower are the nymphs primary food source.  Does anyone have any ideas on repelling or killing the false milkweed bugs with companion planting or natural sprays.  I put radishes in with my roses to keep cucumber beetles off them.  I don't know if that would work for false milkweed bugs too.