Isolate infested plants
Inspect nearby plants
Remove heavily infested leaves
Spray leaves with a strong stream of water
Use yellow sticky traps
Apply insecticidal soap
Apply neem oil
Use horticultural oil
Repeat treatments every 5 to 7 days
Treat the undersides of leaves
Prune overcrowded growth
Avoid over-fertilizing with nitrogen
Remove weeds around plants
Introduce beneficial insects
Vacuum adult whiteflies from plants
Replace heavily infested plants if needed