A composition which is fatal and repellant to pests such as spiders, insect, and mold is disclosed. In concentrate form, the composition includes from about 1 to about 50 percent, by weight, of at least one surfactant from about 1 to about 50 percent, by weight, of at least one essential oil optionally, from about 2 to about 50 percent, by weight, of at least one carboxylic acid having from 1 to 6 carbon atoms and optionally from about 5 to about 50 percent, by weight, of at least one alcohol having from 1 to 6 carbon atoms, wherein all percentages are based on the concentrate in undiluted form. The concentrate may also be diluted with a solvent prior to use.
