[tzs]

Using insects to control insects is not without risk, as you note.

I think the key is to understand very well the insects you are trying to control, and the insects you consider using to control them. Sometimes you can find a predator/parasite that only attacks the pest insect and cannot survive without it. That should usually be pretty safe, because as the pest is eradicated the control insect will die off too.

If you use a control insect that attacks multiple species, or that has a way of surviving absent the target insect, then introducing the control insect can be quite risky.

The more resources we put to understanding insects, the more we can get the good outcomes and avoid the bad.