Spray again with the dormant or horticultural oil. Then see how the plant grows this spring. Back to top I have several plants along my home that look ill. They are all the same, but I am not sure what they are. Can you identify the plant and possibly the problem from the enclosed sample.
Euonymus scale looks like someone took salt and pepper and coated the backs of the leaves and stems.
While it continues to be hot, simply use a general insecticide such as Orthene. Then spray with a horticultural oil this fall or winter. Be sure to check on these plants yearly to monitor for this pest. Next spring, fertilize to help them recover. The Arkansas Cooperative Extension Service offers its programs to all eligible persons regardless of race, color, national origin, religion, gender, age, disability, marital or veteran status, or any other legally protected status, and is an Equal Opportunity Employer.