These insects are small (about 1/16-inch long), white flying insects that resemble moths. Wings are held over the body like a pup tent and are covered with a white, waxy substance.
Whiteflies do not overwinter well in Kansas but at times will build up later in the season due to migration from more southern climes. I have never seen them show up this early in the season.. If you wish to control whitefly on vegetables, try an insecticidal soap or a neem based product. These products are much more effective if used before the population builds up.
There are more options on ornamental plants including malathion, insecticidal soap, neem based
products, pyrethrin, and acetamiprid (Ortho Rose and Flower Insect Killer). Pay special attention to houseplants that have spent the summer outside. Check carefully for whiteflies before bringing inside for the winter. If whiteflies are present, use a product labeled for houseplants. All the products listed above but malathion are labeled for houseplant use. (Ward Upham)