Oak leaf phylloxera—Phylloxera spp.
Phylloxera are tiny yellow soft-bodied insects that feed in groups. They are oval and less than 0.10
inch long; a hand lens is required to see them.
Phylloxera suck sap from leaves. Leaves have many, tiny, irregular brown and yellow spots. Young plants are
Plants are apparently not damaged. Tolerate leaf spots or apply soap thoroughly to leaf underside when
nymphs are present, before severe spotting occurs. Natural
enemies may help to control oak leaf phylloxera.
leaves due to phylloxera damage