Lecanium scale (Parentholecanium spp.)
Oystershell scale (Lepidosaphes ulmi)
San Jose scale (Quadraspidiotus perniciosus)
Description, biology and management Scale insects are small (less than 0.125 inch in length) soft insects that live beneath waxy scales. These insects are often identified by the shape and size of their scales, the description of adult males and females, immature crawler stage, color of eggs, and host plant preferences.
For biology, life history, monitoring and management
See:
Ash (Fraxinus)-Oystershell scale
Cherry, flowering (Prunus)-San Jose scale
See "Scale insect" in:
Management-chemical control
See Table 1 in: