I will start saying that english is not my native language, so, sorry if I find it hard to express myself, especially with gardening expressions, which we don't use in other languages often.
Last week I got myself a baby Pitanga or brazilian cherry tree (Eugenia uniflora). It was in a bonsai pot, although it is not a bonsai, just a baby tree, so I transplanted it to a bigger pot so it could grow a little bit.
In the process, I noticed a lot of little white eggs in its roots and some very little white insects, which I believe are mealybugs:

I had nothing to intervine, so I just continued the process, removed some roots and hoped for the best. I think I should have washed the roots, but at the time I was afraid I could hurt the tree too much.
Anyway, now it has been 5 days since the process and I'm looking for ways to get rid of mealybugs on roots, but can't find anything. I bought a insecticide called Dimy, it's formula is DDVP 200 ce and I'm thinking in diving my plant in a solution with it for some time. Do you think it would work?
Can somebody help me?
Thanks!