i have had almost every root bug (FG, RA, Thrips, Bulb mites, springtails). no soil is "bug free". so you have to have some kind of system in place to take care of them at early age before the colony gets overwhelming in flowering when its more dificult to do anything and your roots are destroyed, leaving you with 10-50% of normal harvest.
this year i am using preditor bugs. just added hyposasis FG preditors and nemitodes. to my 1 gal pots
also adding MET 52 for RAs