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Powdery mildew on Euonymus japonicus. This particular mildew (Erysiphe euonymicola [syn. Oidium euonymi-japonici]) is specific to Euonymus japonicus and is very common, more so on the green-leaved species rather than the variegated cultivars. This image shows an advanced case at the point in autumn where overwintering spores are about to be released. Left unchecked the disease will cause stunted yellow leaves and, eventually, partial defoliation. pests-and-diseases-3512htm'>Plant. Pests and Diseases
![Powdery mildew on Euonymus japonicus. This particular mildew (Erysiphe euonymicola [syn. Oidium euonymi-japonici]) is specific to Euonymus japonicus and is very common, more so on the green-leaved species rather than the variegated cultivars. This image shows an advanced case at the point in autumn where overwintering spores are about to be released. Left unchecked the disease will cause stunted yellow leaves and, eventually, partial defoliation. pests-and-diseases-3512htm'>Plant. Pests and Diseases</a>](./data/media/3/CFGev05.jpg "Powdery mildew on Euonymus japonicus. This particular mildew (Erysiphe euonymicola [syn. Oidium euonymi-japonici]) is specific to Euonymus japonicus and is very common, more so on the green-leaved species rather than the variegated cultivars. This image shows an advanced case at the point in autumn where overwintering spores are about to be released. Left unchecked the disease will cause stunted yellow leaves and, eventually, partial defoliation. pests-and-diseases-3512htm'>Plant. Pests and Diseases</a>")