I have a colony of ants using my trellis system at a bridge(they come from the base of the pole).Does anyone know if they will kill my ladybugs and/or eat my plants?
Ants aren't good but probably not for the reason you think. Ants farm aphids and their presence on your plants means you may have some aphids somewhere. Ants won't hurt your plants and Lady bugs can take care of themselves against them.