Pyrethroids are synthetic versions of pyrethrin, a natural insecticide found in certain species of chrysanthemum. It initially was introduced on the market as a ‘safer’ alternative to the highly toxic organophosphates, such as chlorpyrifos and diazinon which were banned for homeowner use in 2001 and 2004, respectively. They are now one of the most popular class of household pesticides, available in the form of powders and sprays to control ants, mosquitoes, fleas, flies, and cockroaches. Pyrethroids are dangerous to aquatic life even at concentrations used to eliminate mosquitoes. Of the varieties of pyrethroids used, befinthrin was most commonly found in previous research conducted by Dr. Weston.