No, I wouldn't use that.
I'm not sure if she'll make it.
All you can do is keep her warm. If possible, you can dip a Qtip into a bit of warmed sugar water (1tblsp sugar to 1 cup water), press a 1 drop of the sugar water into her beak and see if she will reflexively swallow. Only give one drop. If she swallows, then give her another drop.
I'm very sorry that she's not doing well.
I do suggest that you try to get some dust or spray and treat the other bird(s) too. Usually if one has bugs, the others do too.
The spray concentrate is more economical as far as how many "uses" you can get out of it, but we all have to go by our budget as well.