I once tried sticky traps in the vegetable garden. A poor little bird got stuck on one. I tried to catch it but its wing was stuck fast. It scrambled away into a hedge and I couldn't save it. Presumably it eventually died. So I've never done that again, strictly indoors only. Maybe there's a way to enclose them in something that would just let the insects through.
What I was trying to say above is that whether you try a systemic insecticide depends on how bad the infestation is and your tolerance for it. In some cases there are only a few leaves affected so you can remove and destroy them to reduce the number of miners. Growers may decide to just live with it. When a leaf is still mostly green it is still functioning (photosynthesizing) even though we might not like the look of the wiggly lines.
Using a systemic insecticide can have an impact on other, possibly beneficial, insects as well so it's a personal judgement call whether one decides to go that route. Well, it wouldn't be where I am because systemic insectides are banned for homeowner/cosmetic use by the provincial government so unobtainable anyway, but fortunately the leafminer hasn't found its way here yet.
