Mysterious insects attacking my oak trees?


Thanks for your question. These appear to be oak lace bugs, Corythucha arcuata, and the spots on the leaves are actually their eggs.

While a high abundance of oak lace bugs might seem like a cause for concern, they tend to not cause much damage to mature, healthy plants. Oak lace bugs have many natural predators that help control and reduce booms in insect populations, which is likely what you are experiencing now.

There are a few ways to control oak lace bugs if you wish to do so. You can use high-pressure water to knock the insects off plants, there are also several different insecticide treatments you can use (but keep in mind that these can impact beneficial insects as well).

Here are some additional resources with tips for identification and treatment:

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