Pets should be kept out of the areas while treating to avoid any accidental xposure. For indoor use, Terro Ant Dust should be applied using a bellow hand duster lightly and uniformly to infested areas. Do not apply in large clumps or surfaces where pets and/or humans would have direct contact. Pay particular attention to cracks and crevices, service ducts, false floors and ceilings, wall voids, around electrical and telephone fittings and equipment, around water and sewer pipes, under and behind cabinets, refrigerators and sinks; around windows and door frames; along baseboards; in attics and crawl spaces.
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Terro Ant Dust is not labeled for butterflies or caterpillars but is not selective, if they contact a treated area long enough they could be effected. If you would like to take extra precautions then we would advise not applying when they are not actively there and avoid areas they would land.