Is Greenbug the best bet for fighting termites?

The difference is that XT-2000 can only be applied by professionals as it isn't available to the public.

In any event, either product is much safer than structural fumigation with sulfuryl fluoride (Vikane).

Mix 1/4 cup of food-grade DE in a gallon of vinegar and spray pests with the mix or pour into ant mounds as a drench.

Do not buy or use DE sold for swimming pool filters.

Diatomaceous earth is abrasive to lung and eyes - so use proper personal protection when using this product.

Cockroaches and other insects won't live in the crawl space and spiders won't stay there if there isn't anything for them to feed on.

Food-grade DE will last indefinitely, but I recommend dusting every year to allow for breezes coming through vents covering it up or people going under the house and scattering it when they crawl around.