Will Whiteflies Kill Plants?

Whiteflies can cause two types of damage to a plant. ... Whiteflies can seriously injure plants by sucking juices from them, causing leaves to yellow, shrivel, and drop prematurely. If the numbers of whiteflies per leaf are great enough, it could possibly lead to plant death.

How do you get rid of whiteflies?

Spraying the underside of your plant's leaves with Neem oil or a soap spray can kill these pests. For best results, spray in the mornings or evenings when it's cooler. To avoid blocking photosynthesis, don't spray the top surfaces of your plant's leaves (the whiteflies don't hang out there, anyway).

How do you get rid of whiteflies on outdoor plants?

A simple solution made from liquid dish soap and water will kill adult whiteflies without harming plants. Add 1 tablespoon of liquid dish soap to 1 gallon of water and mix well. Pour the solution into a plastic spray bottle and spray it on all infested plants, saturating the leaves' upper and undersides and the stems.