A hollyberry tree has been treated three times (2007–2008) with a trunk-injected systemic by a pest control company. The owner sees improvement but fears recurrence and wants to know if they can buy the product themselves.
This systemic insecticide is applied to the soil around the tree. Roots absorb it and transport it to leaves and twigs, killing scales when they feed. It's available at nursery/garden stores.
DIY application avoids the $150 per visit charged by pest control companies. The product provides comparable results when used correctly.
Product details: Bayer Advanced Tree & Shrub Insect Control.
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