Don't like all those chemical dusting to put on flowers to keep the bugs away? Use plain flour instead. Just dust it on roses and etc., and it works well to rid plants of bugs. Flour makes it almost impossible for the insects to breath. Happy Gardening!
Nasturtium planted a few feet away from tomatoes or other plants will "attract" the aphids away from them. Another "old farmer" trick to attact bees for pollination is to plant marigolds here and there.