Never had any problems with whiteflies but they're having a good year. I've been fighting these things for 3 months now. Nothing seems to even make a dent in them. I've tried a few natural remedys, then bug-b-gone(which they seemed to love) and finally stepped up with malathion-plus which seems to kill them on contact but the next day I still see dozens of them. I've made sure to get the underneath side of the leaves where they hang out. Even spraying every other day for the past week hasn't stopped them. They've pretty much killed off all my morning glory annuals which should be over 20 feet high by now if not for these whiteflies. Really taken the joy out of my flower gardening this year. They've pretty much sucked the life out of them to the point where they're beyond saving. Otherwise I'd get blooms from them til December.(zn 9) I really didn't want to use any pesticides and I can't think of anything stronger than malathion. Short of just writing it all off and finding a flamethrower, is there anything else I can try?