Whiteflies can be killed by using biological controls, trapping using a sticky substrate, removing and destroying heavily infested leaves or vacuuming adults from leaves and then freezing the vacuum bag prior to disposal. Do not use pesticides except by direct spraying of whiteflies with neem oil or insecticidal soap.
Whiteflies are difficult to control in large numbers as they quickly build up resistance to pesticides quickly. Further, pesticides often destroy natural predators such as lacewings, big-eyed bugs, minute pirate bugs and lady beetles. Aluminum foil or reflective plastic mulches tend to repel whiteflies, and removing favored plant hosts can also help. Sticky traps are available commercially or can be made by coating boards with a 1:1 mix of petroleum jelly or mineral oil and household detergent.