I wonder if this would work for fire ants? Or are they small enough to go under the wire?

Haven't had any fire ants in quite a while, but the "crazy ants" just walked around the top of the pot rim and went in.
The nylon screen has worked well for me. The weight of the soil on the screen keeps the screen in place.

I wonder if fire ants go in from the top or the bottom when they get into a container. I'd have thought through the hole in the bottom, but they are active little fellows so I guess they could invade either way. It was a problem this past summer. Perhaps because of the rain we had. Guess I'll just have to try the screen. Other insects aren't much of a concern to me. I suspect the occasional grubworm(s) that I find hatched from eggs in the soil. Thanks.

I started using the screen to keep the earwigs out. Hate 'em!
Grubworms! We have the Rhinocerous beetle grubs around the back of the pond. Ick! I just toss them over the fence. They really aren't pests, I just don't like to turn the soil and find one squirming around. They can find plenty to eat in the greenbelt.