Harris Bed Bug Killer, Diatomaceous Earth (4lb with Duster) is a ready-to-use powder which provides effective pest control against crawling insects. Diatomaceous Earth works as a mechanical insect killer that cuts the exoskeleton of insects, leading to dehydration and death. Insects cannot become immune to its action and those that come in contact or ingest this powder and die within 48 hours. For use in and around residential and commercial buildings, structures and their immediate surroundings, and in and around food/feed handling establishments.

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