A 10–11 foot star magnolia has magnolia scale infestation. Arborist treatments scheduled (Sept insecticide/oil, dormant oil later). Friend recommended Merit soil treatment now. Wasps/hornets swarm tree near front door—homeowner terrified.
Wasps are attracted to honeydew (sweet excretion) from scale insects. Eliminate honeydew → wasps leave.
Scheduled arborist treatments + Merit will control scale next year. Merit takes time to translocate; not immediate. Insecticidal soap is low-toxicity and safe for frequent use. See usage guide.
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