Final answer:
Diatomaceous earth takes about 7 to 17 days to effectively kill a significant number of bed bugs. It works by dehydrating the bed bugs after coming into contact with their exoskeleton.
Step-by-step explanation:
Diatomaceous earth is a natural substance that is effective at killing bed bugs by causing dehydration. The process, however, isn't immediate.
When bed bugs come into contact with diatomaceous earth, it begins to affect them by adhering to their exoskeleton and absorbing the oils and fats from the cuticle of their exoskeleton. The estimated time for diatomaceous earth to kill bed bugs can vary, but most sources suggest it takes approximately 7 to 17 days for it to effectively kill a significant number of bed bugs when applied to an infested area.
To maximize effectiveness, it should be thinly spread over areas where bed bugs are suspected to travel or hide, such as mattress seams and bed frames. Consistency and coverage are key, as bed bugs must come in direct contact with the diatomaceous earth for it to work.