C. kuwanae feeds not only on euonymus scale but also on San Jose scale and white peach scale. Each one of these beetles consumes several hundred scale insects during its lifetime. Another introduced predator of euonymus scale is a beetle called Cybocephalus nipponicus . This tiny species is about the size of a pinhead. While not as voracious as Chilocorus kuwanae, Cybocephalus nipponicus is also useful in controlling populations of the scale.
Parasites can also help suppress euonymus scale.
Unlike the predators, which simply gorge themselves on scales, the parasites are more subtle. Tiny parasitic wasps lay their eggs inside the scale insect's body. When the eggs hatch, immature larvae slowly feed on the host. As the parasite completes its development, it eventually kills the scale. Once these predators and parasites become well established in the United States, euonymus scale will be controlled biologically.