Identifying and Controlling Cottony Camellia Scale on Holly

If you’ve noticed fuzzy white blobs clinging to the undersides of your holly leaves, you’re likely dealing with cottony camellia scale. This sap-sucking insect attaches itself to the leaf undersides and, when populations are high, secretes a sticky honeydew that coats nearby foliage. That “syrup” quickly becomes a breeding ground for black sooty mold, further disfiguring the plant.

Effective Treatment Options

To manage an infestation, thoroughly spray horticultural oil on the undersides of the leaves to suffocate the scales. Alternatively, a systemic insecticidal drench applied to the soil can provide longer-lasting control. Repeat applications may be necessary for severe cases.