The red oak group includes northern red oak, black oak and scarlet oak, and the white oak group includes eastern white oak, post oak, swamp white oak and chestnut oak. It’s easy to identify a red oak ...

Want to know what's ailing nearby trees? This index of common tree diseases and pathogens can help you identify and prevent further decay.

The oak lace bug is native from southern Canada to the Eastern, Central and Southern United States. In Oregon, they are mostly a pest of urban oaks but can infest related trees.

The swamp white oak has leaves with wavy, uneven lobed margins with blunt teeth, which are wider toward the tip than at the base. The alternately-held leaves are typically dark green on top with a ...