Chemical pest control will always be harmful and unnatural so many advocates of organic and natural methods are pushing for an age-old treatment for pest control that guarantees wiping out entire colonies of whatever creepy crawlies you have in your home or garden--diatomaceous earth. Silica minerals and wood dust has long been used as a form of pest control for ages and only recently have branded products been popularized as a solution for cockroaches, fleas and ticks as well as bed bugs.