Stems and fronds are covered with white, cottony, cushionlike masses; brown, crusty bumps; or clusters of somewhat flattened reddish, gray, or brown scaly bumps. These masses don''t move when touched. The bumps can be scraped off or picked off easily. Fronds turn yellow and may drop. A shiny or sticky material may cover the lfronds and stems. Sooty mold may develop on the sticky substance.
Isolate infested plants as soon as scales are discovered. Remove as many scales as possible with a cloth or toothbrush dipped in soapy water. Avoid bringing scale crawlers into the house. Apply an insecticide labeled for these pests, following label directions.