Coccus hesperidum
Pest description and damage Brown soft scale are flat, yellowish to dark brown, somewhat mottled insects. They are found on twigs, although young scale also may be found on the foliage, typically on the underside of leaves and along veins. Scale suck plant sap and produce copious honeydew on which sooty mold may grow. Brown soft scale has a wide host range. There are multiple generations per year.
Management--biological control
There are numerous parasitoids that control this scale if left alone. Occasionally an outbreak occurs, but parasitoids will find it and the population will crash.
For biology, life history, monitoring and management
See "Scale insect" in:
Management-chemical control
See Table 1 in:
Chemical Control of Landscape Pests
For more information
Anon. 2008. UC Pest Management Guidelines for managing brown soft scale on citrus (http://www.ipm.ucdavis.edu/PMG/r107301311.html)