What can I use on my Lilly pinky trees instead of confidir?
Not sure where you are located or what a lilly pinky tree is, maybe a local name for a plant that we know by another name.
We would need to know what the target pest is or what signs of plant damage you are seeing, in order to help you with pest control options.
The product sold as Confidor contains the active ingredient Imidacloprid, a nicotine chemistry based systemic insecticide. It is effective for control of some insect pests, but not all.
It is used as a foliar spray and can also be applied as a soil drench for root uptake. Any product with that active ingredient may be a substitute, but you would have to know what the target pest is and what type of application and the solution concentration that would best address the infestation, safely and effectively.
If you are looking for a different class of insecticide, because maybe your application of Confidor didn't work, then please ask us again with a little more information so that we can be of better service. Photos are always a big help.