Can microdialysis be made in Drosophila melanogaster?
It seems highly unlikely to me. The smallest microdialysis probes I've ever seen are about 250 µm in diameter, so about the size of a Drosophila hemisphere. You can deliver drugs by microinjection (well, I assume you can, seeing as a) you can do it in honey bees and b) you can perform whole-cell patch clamp recordings in Drosophila).