One azelea has black stems and occasional white balls indicating a fungus. What can I do?
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One azelea has black stems and occasional white balls indicating a fungus. What can I do?
This is Bark Scale and you should treat your plants with an insecticidal soap.
Here are some links with more information.
https://www.gardeningknowhow.com/ornamental/shrubs/azalea/azalea-bark-scale.htm
https://www.gardeningknowhow.com/plant-problems/pests/pesticides/homemade-soap-spray.htm
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