Euonymus scale crawlers are emerging now in Raleigh, NC. I found them on this sad looking bush on campus. Notice from the pictures there is (at least) two kinds of scale on this plant. The adult female euonymus scales are grey and oyster shell shaped. The crawlers are small yellow spots covering the leaf. The other scale that you see is cottony camellia scale. They are currently in every stage except crawler. We found adults and nymphs on twigs, adults producing cottony ovisacs, and eggs. The crawlers will be active soon.
Back to euonymus scale, now is the time for control. We have found oil to be as effective as other insecticides when crawlers are active. However, neonicotinoids and insect growth regulators provide longer control. See our recent paper testing the efficacy of many products for euonymus scale control and their effects on natural enemies or our fact sheet.