Woody Ornamental Pests

ENTFACT-433: Oystershell Scale  |  Download PDF

by Lee Townsend, Extension Specialist
University of Kentucky College of Agriculture 

Oystershell scale is a common armored scale that can infest more than 100 plant species. Among the common hosts are lilac, ash, dogwood, maple, and willow. Males and females are about 1/10" inch long and resemble oyster shells. Their drab, bark-like appearance makes them easy to overlook, even on close inspection. Heavy infestations can kill twig or branches. 

ENTFACT-432: Obscure Scale  |  Download PDF

ENTFACT-431: Magnolia Scale  |  Download PDF

ENTFACT-430: Lecanium Scales  |  Download PDF

by Lee Townsend, Extension Specialist
University of Kentucky College of Agriculture 

Several species of soft scales, referred to as Lecanium scales feed on sap from shade trees and woody ornamentals. They are more or less hemispherical or turtle-shaped, brown, and range in size from 1/8 inch to 1/6 inch. While there are several very similar species, all have one generation a year and a general set of recommendations can be used to manage them. 

ENTFACT-429: Juniper Scale  |  Download PDF

ENTFACT-428: Euonymous Scale  |  Download PDF

ENTFACT-427: Cottony Maple Scale  |  Download PDF

ENTFACT-419: Plant Bugs and Lacebugs  |  Download PDF

by Brian Skinnell and Lee Townsend, University of Kentucky Entomology
University of Kentucky College of Agriculture 

Plant bugs and lacebugs use their sucking mouthparts to feed on plant sap. Damage ranges from many small white spots on the leaves to distortion or destruction of plant tissue, depending on the pest and host plant. Some feed on many different types of plants while others feed only on a narrow range or single species. 

ENTFACT-414: Yellow Poplar Weevil  |  Download PDF

ENTFACT-408: Common Oak Galls  |  Download PDF