Over the last few decades there has been great research on citrus at UC Riverside, and in the last couple years I'd been able to piggy back on some of the student's research findings. There are many acres of trees which cannot be used for anything other than research (no eating fruit). Yes, it's that extensive. It has been found that although leaf miners leave a pretty unsightly patch of foliage (especially new foliage), the typical amount of foliage damage they do on a fruit bearing size tree is insignificantly affecting fruit production, and any use of pesticides should be considered for aesthetic use only. Not in prevention of fruit loss since they do not bore into pedicels, peduncles, or calyxes. Where it can be helpful is when a very young plant gets severely affected, which likely is not high in fruit production yet.
Overall, at least for borer issues on mature trees, I would suggest to leave them without treatment since it seems to show that there are more chances of fruit containing toxin byproducts from these pesticides no matter which you chose, since they all catalyze into other chemical compounds once absorbed into the xylem.
One effective treatment which is natural and more of a preventative (early season) is Neem Oil sprayed on the circumference (top and bottom of foliage). This is a very effective deterrent for the moth to lay eggs on the underside of the leaf at the side of the spine. The moths tend to lay eggs from June through Oct-Nov (depending on area). So knowing this, early June through Sept-Oct would likely be the best time for application. It is difficult to see the moths since they are very tiny and only active from dusk to dawn.
I hope this helps on the answer of the leafminers.
