Blumberg, D., & DeBach, P. 1981 Effects of temperature and host age upon the encapsulation of Metaphycus stanleyi and Metaphycus helvolus eggs by Brown Soft Scale Coccus hesperidum.. Journal of Invertebrate Pathology 37: 73-79.

Notes: Encapsulation of eggs inserted by Metaphycus stanleyi into Coccus hesperidum became more frequent as host matured; optimum temperatures for encapsulation discussed.