Didn’t try, but could work

I had some very good experience with lady bugs against aphids. So I was looking for something like that and found a “caterpillar fly” (direct translation, not sure if this is correct. Scientific name: Trichopoda pictipennis)

Maybe I could set them out in my balcony garden. But as it’s not a real garden, but only a few larger flower boxes, I’m afraid they won’t make it long with an active infestation.

But I also haven’t found a shop for them yet and don’t know, if they can be applied like lady bugs.
Can’t stress enough how well that worked against aphids - and I really like them :⁠-⁠)
With a little “bug hotel” they also came back and tried to settle. But sadly our apartment block had the balconies renovated and I needed to move the hotel and now need to start fresh…