Photo by Drees. Adult males emerge from these scales as tiny two-winged insects.
Life cycle is intermediate.
Winged adult males emerge and seek female scale insects and mate. Before dying, females produce a cluster of eggs underneath the scale shell. There are two or three generations per year, with eggs of the first generation hatching from April to June. However, all stages of development can be found during most of the year. Scale insects on leaves are predominantly the white males, occurring mainly on the underside of the leaf until they become numerous.