A sap-like substance is usually found on leaves.
Most scales are about the size of a pin head or slightly larger.
Insecticidal soaps and regular washings can help limit scale build-ups. Scales are not found in uniform, even rows, especially on ferns. Copyright 1995 by the Board of Trustees of the University of Illinois. The information provided is for educational purposes only. References to commercial products or trade names do not constitute an endorsement by the University of Illinois and do not imply discrimination against other similar products.