Once these predators and parasites become well established, euonymus scale will be under biological control, which will be self-perpetuating. With the right combination of natural enemies, biological control is effective and long lasting. Successful biological control of euonymus scale will lessen the amount of pesticides used in the urban environment. Chilocorus kuwanae is a major predator of euonymus scale. Euonymus plants offer the landscape designer several choices in structure and foliage color.
Some types exhibit colorful fall foliage.
Euonymus plants showing damage caused by euonymus scale. To date, Chilocorus kuwanae is the most successful of the euonymus scale natural enemies imported into the United States. Cybocephalus nipponicus adults are no bigger than the head of a pin, but they willingly consume euonymus scale. Parasitic wasps are being imported into this country to add to the complex of natural enemies. USDA is an equal employment opportunity employer.