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Phylloxeras

General recommendations. Phlloxera are tiny, yellowish insects that suck sap from the underside of leaves, particularly on oak species, producing tiny, irregular brown and yellow spots. Damage is primarily aesthetic and is not serious. Either tolerate this pest or apply insecticidal soap to the Underside of affected leaves before they become severely spotted.
Images: Click on image to enlarge or on underlined captions for more information.

Phylloxera (Hemiptera) are a tiny insects that sometimes feed on roots but can also cause leaf galls, as on these grape leaves (Vitex)
High resolution image available.

Close-up of galls on grape leaves (Vitex) caused by phylloxera (Hemiptera)
High resolution image available.

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