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You don't need insecticides or ant traps to ant-proof your kitchen. Just give it the lemon treatment. First squirt some lemon juice on door thresholds and windowsills. Then squeeze lemon juice into any holes or cracks where the ants are getting in.
Sprinkle DE along outside edges on window sills and doors to prevent spiders and ants from entering the house.  Pour into a lawn spreader and apply diatomaceous earth to yard to kill fleas, tics, chiggers and other biting insects that attach themselves to pets. Sprinkle on bushes with a strainer.  Apply diatomaceous earth on garden soil and plants to protect them from vegetable-loving insects.