Whiteflies are small hemipterans that typically feed on the undersides of plant leaves. They comprise the family Aleyrodidae, the only member of the superfamily Aleyrodoidea.
In order to see if whiteflies are present in your garden, just gently shake your plants at the base of the stock. After this, if you notice a flock of something that resembles winged white dust or small white moths flying around, then you might have whiteflies.
One of the mains signs of whiteflie damage is chlorosis (yellowing in the leaves). The leaves will start to dry up beginning around the edges, then begin falling off. The growth of the plant will also start to reduce and degenerate.
Whiteflies are resistant to pesticides, so they can be difficult to kill. They always show up like a mob which makes it difficult to deal with them. The right way to control them is to take preventative measures.
Use preventive measures indoors, including filters on any and all air intakes or passive vents. Some people have said that powdering plants with Diatomaceous earth can effectively kill whiteflies.
Companion planting is an excellent, natural way to stop whitefly attacks. Planting zinnia near your crop along with the aforementioned marigolds will push whiteflies out of your garden.
Zinnias appeal to natural whitefly predators when they are a part of your garden. They gain the attention of hummingbirds, predatory wasps and flies, who like to prey on whiteflies. Hummingbird bush, bee balm, and pineapple sage are some examples of strong scented plants that mask the smell of any nearby plants that whiteflies are attracted to.