Symptoms of Powdery Cyclovirobuxine Powdery Mildew: White powder is mostly distributed on the leaf surface of Euonymus japonicus and on the back of the leaf. The single lesion was round and white, and lesions expanded irregularly after healing. When the superficial white powdery mycelia and spore layer were wiped away, the original diseased site showed yellow round spots. In severe cases, the sensitivity of new shoots can reach 100%. Sometimes diseased leaves shrink and deformed and atrophied.
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