Daktulosphaira vitifoliae

These microscopic, pale yellow sap-sucking insects, feed on the roots and leaves of grapevines. On Vitis vinifera, the resulting deformations on roots (“nodosities” and “tuberosities”) and secondary fungal infections can girdle roots, gradually cutting off the flow of nutrients and water to the vine. Nymphs also form protective galls on the undersides of grapevine leaves of some Vitis species and overwinter under the bark or on the vine roots; these leaf galls are typically only found on the leaves of American vines.

Image used under the Creative Commons Attribution-Share Alike 4.0 International license. Attribute: Beatriz Moisset

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