Tipping the scale
Soft scale

Tipping the scale

Departments - Under the Microscope

Determine what type of scale insect you have because the two types require different methods of control.

July 12, 2022

Magnolia scale
Photos : Raymond Cloyd. Top Left: Brian Kunkel, University of Delaware

Scale insects are notorious pests of trees and shrubs. It is essential to distinguish armored scales (family Diaspididae) from scales in other families such as soft scales (family Coccidae). This is because armored scales are less vulnerable to contact insecticides than soft scales.

Some of the most common armored scale species in nurseries are euonymus scale, tea scale, Japanese maple scale, false oleander scale, and juniper scale but the list will vary based on your region and crop plants.

Source: Greenhouse Management magazine, North Carolina State University