What is Diatomaceous Earth?
It is a non-toxic, safe substance made up from crushed fossils of freshwater organisms and marine life. Crushed to a fine powder and observed through a microscope, the particles resemble bits of broken glass. Deadly to any insect and completely harmless to animals, fish, fowl or food. Most insects have a waxy outer shell covering their bodies, INSECT STOP scratches through this shell causing the insect to dehydrate leading to eventual death.

Also some fly strips would help on the flying bugs....

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SaH Reviewed by SaH on . Best soil pestiside?????PLEASE ANSWER ME!!!! need to kill bugs(spidymites,white flys ect... that are in the soil.Also larva in the soil Too.Safest for cannabis but still works well?been using bio neem oil(not enough)I even sprayed the soil with the neem oil. Rating: 5