Pyracantha, apple, pear, cherries, other rosaceous hosts. Hickory, apple, cherries, and dogwood. Elm, maple, basswood. Flowering cherry, Syringa species, and ligustrum. Successful scale control involves correct identification of the species, and knowledge of its host range and life cycle.
Many insecticides are effective at low doses when properly timed at the crawler stage.
Systemic insecticides that move in the right tissues can provide control of feeding stages from within. Few insecticides have ovicidal activity and the armor protected eggs are usually very difficult to kill. Although dormant oil treatments are effective against overwintering stages, treated plants should be periodically checked as spring growth commences to determine the effectiveness of the oil treatment and the need for follow-up treatments against the crawlers. The armored scale covering does not drop off the host. It will wear away over time or, in the case of pine needle scale on conifers, disappear when the older needles normally drop.