Final diagnosis


Daktulosphaira vitifoliae (Phylloxera, Grapevine root-aphid)

During strong attacks of Phylloxera, localized lesions, chlorotic and more or less necrotic are visible on the upper surface of the leaf blade. <b> <i> Daktulosphaira vitifoliae </i> </b>
Presence of numerous galls on the lower part of leaves of American grape variety attacked by <b> <i> Viteus vitifoliae </i> </b>. Their number causes a characteristic deformation of the limbus. (phylloxera)
Gallicole <i> Daktulosphaira vitifoliae </i> attack on an American vine. Presence of galls on the underside due to insect bites.
Detail of Phylloxera galls visible on the underside of the leaf blade. <b> <i> Daktulosphaira vitifoliae </i> </b>
The young leaves of this vine twig are covered with reddish Phylloxera galls on an American vine. <i> <b> Daktulosphaira vitifoliae </b> </i>
Reddish phylloxera galls are most visible on the lower leaf blades of grape leaves. <i> <b> Daktulosphaira vitifoliae </b> </i>
Strong attack of gallicola phylloxera on an American vine. Presence of reddish galls on the underside of the leaf. <i> <b> Daktulosphaira vitifoliae </b> </i>
Detail of two reddish galls on the underside of a grape leaf. <i> <b> Daktulosphaira vitifoliae </b> </i>
Ostiole of a gall located on the upper surface of the blade through which the young larvae of <i> <b> Daktulosphaira vitifoliae </b> </i> (phylloxera) will emerge
Detail of the eggs present in a phylloxera gall. <i> Daktulosphaira vitifoliae </i>
Detail of a <i> Daktulosphaira vitifoliae </i> larva in a developing gall. (phylloxera)
Detail of the galicole larva.
Adult founder near her eggs in spring.
Female of <i> <b> Daktulosphaira vitifoliae </b> </i> and her eggs in a phylloxera gall.
Presence of a phylloxera nodosity on vine root. <b> <i> Daktulosphaira vitifoliae </i> </b>
Phylloxera 13
On this nodule we observe several larvae of <i> <b> Daktulosphaira vitifoliae </b> </i> (phylloxera)
Eggs close to second generation root larvae. <i> <b> Daktulosphaira vitifoliae </i> </b> (phylloxera)
Several second generation root larvae observed on roots. <i> <b>Daktulosphaira vitifoliae</b> </i> (phylloxera)
Larvae of different stages are present on a knot. <b> <i> Daktulosphaira vitifoliae </i> </b> (phylloxera)
Detail of a radicole, we can clearly see the eyes, the antennae and the stylet. <b> <i> Daktulosphaira vitifoliae </i> </b> (phylloxera)
Nymph of <i><b>Daktulosphaira vitifoliae</i></b>. (phylloxéra)
Winged adult of <i><b>Daktulosphaira vitifoliae</i></b>. (phylloxéra)