Scale on Geraniums
How can I get rid of scale on underside of geranium leaves.
Otsego County Michigan
You likely have an infestation of white flies. Strictly, they are not flies at all, but a form of wood louse. ‘Flour lice’ is one common name for them, since their whiteness suggests they have been dusted with flour. These very small insects are closely related to greenflies (aphids) and scale insects.
Active indoors and out, whiteflies are specially fond of fuchsias, geraniums, hibiscus, impatiens and poinsettias among popular house plants. Many insecticides can provide good whitefly control; however, the yellow sticky cards may work just as well and be safer. Be sure to select a control that specifies that it kills whiteflies and carefully follow all directions for use.