A rope placed around the garden will keep out snakes or in warm climes, planting lemon grass, Cymbogon, will achieve the same. Forget it--neither work. Nor will placing plastic jugs of water keep dogs off lawns or sprinkling sugar or baking soda on the soil produce sweet tomatoes. Down Under, Australians have recommended boiled onions to cure worms in children--see your family physician instead. And French-Canadian lumberjacks believed that any woman who passed near a jack pine, Pinus banksiana, would become permanently sterile--but there remains no shortage of Quebecois.