I used food grade DE for the control of ants and it did a great job! no more ants after just 2 days...
Of course I reapply if it rains and then no ants for a few months.
I always keep a 50 lbs. bag on hand in the garage. This way if I see moths or cutworms or the Japanese beetle or any bug that is not garden friendly and helpful I sprinkle DE all around and it controls them as well.
Any crawling insect looking to eat my veggies or fruit has to crawl over the DE and it is effective - The last crawl...
The recent pandemic (and other issues) has exponentially increased sales for worms, gardening, and anything related to sustainability for 2020, 2021, and beyond "Transitory". 2022 Could be Even Bigger! The Most Important Article I've Ever Written. It's Why You're Here!