I don't think micronutrients would work. I do have added insect repellant, fungicide and insecticide according to the problem at hand. On the other hand, there are specific adjuvants like Pentrabark made to penetrate the bark and move the fungicides into the xylem. I have used it with phosphorous acid Reliant, Agriphos etc.
there is a possibility but why do it if the roots do a much better job with micros.