Argentine Ant is the great protector of many pests found on plants.  Without the Argentine, many pests would not be so much of a problem. In many crops, like cherimoya and passionfruit, mealy bug can become so severe that fruit will stop growing and fall off the tree.  Controlling Argentine, makes it possible for predators and parasites to do their thing in bringing them under control.  Watch these two videos to see how hoverflies (syrphids) can help biocontrol and how Argentine Ant control can help that biocontrol

Citrus Psyllids Bribe Ants With Strings Of Candy Poop | Deep Look - YouTube

How Hoverflies Spawn Maggots that Sweeten Your Oranges | Deep Look - YouTube

Cherimoya fruit and stems covered with mealy bug.