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Scale Insects on Oak Trees (IL)

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From: Patty Kozak
Libertyville, IL
We live in an oak forested area. The entire neighborhood is experiencing a terrible infestation of scale insects - so much so that other plants, driveways, patios, streets are covered with the sticky substance that these insects emit. Is there anything that can be done? Our oaks are 50+ years old, so they are quite large and I would imagine hard to treat. We might be able to treat some of the smaller trees - redbud for instance, but won't they just be re-infested if we don't treat all the trees?

Extension Message
From: Jay Hayek
Extension Specialist, Forestry
Department of Natural Resources and Environmental Sciences
Hi Patty:

Attached is an excellent publication from Purdue University regarding the identification and control of scale insects:


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