When needed, release of reared parasites has been highly effective. Like some other scales, the soft brown scales are able to encapsulate the eggs of its parasites. No encapsulations of parasite eggs have been reported in Hawaii. Parasites with rapid egg delivery have little problems with ants. As in the use of all chemicals, consult the label to see what chemicals may be used on specific crops.
Sprays are effective on the nymphal stages of scales.
However, control is difficult on other life stages. Chemical applications should be used only when parasites are not economically effective. The application of pesticides may offset control by natural enemies and present other problems in the future. Bartlett, B. R. and W. H. Ewart. Effect of Parathion on Parasites of Coccus hesperidum L. J. Econ.