Spider mites on Brugmansia, remedy?

I'm growing my first brugmansia from a cutting. All was going well until it developed spider mites. Is there a systemic remedy for this. If not, does anyone have a suggestion? I would appreciate any help offered. Thanks

I use "Sunspray" horticultural oil and spray the undersides of the leaves as well as the growth tip...it doenst scorch them if you follow directions..it smothers the mites AND their eggs.

I have been spraying mine with Sevin solution. (Was a suggestion that Dave gave me last year)

I use off leaves and spray on the soil to kill spider mites so it never happen again just once had spider mites It helped! Oh I use soap liquid with lemon and I thanks to Calalily.