I don't know I wouldn't chance it...get some new stuff and a bug bomb(IF your flowering they have ones you can use till last week of flower(Pyrythium(organic)...I think))
Get some of those yellow sticky strips...white flies are atrackted to yellow and the strips work well along with neem and an overdose of CO2 in your grow room could help get rid of them.
Or a sulfar burner.