Final diagnosis


Rot blanc (Coniella diplodiella)

More or less advanced symptoms of white burp on bunches of grapes in the vineyard (symptoms starting on the left cluster, more advanced symptoms on the right cluster). <i> <b> Pilidiella diplodiella </b> </i> (white rot)
Very advanced symptoms of white burp on bunches of grapes in the vineyard (completely rotten bunch on the left, detail of the presence of pycnidia on the berries on the right). <i><b> Pilidiella diplodiella </b></i> (white rot)
Particularly advanced symptoms of white burp on bunches of grapes in the vineyard; note the more or less substantial proportion of shriveled berries. <i><b> Pilidiella diplodiella </b></i> (white rot)
All the berries in this bunch of grapes are fully mummified, some have fallen. <i><b>Pilidiella diplodiella</i></b> (white rot).
Assortment of grape berries colonized by <i> <b> Pilidiella diplodiella </b> </i>. Note the presence of numerous pycnidia on the most shriveled berries (white rot)
Example of the evolution of symptoms in grape berries affected by white burp. these shrivel up more and more. <i><b> Pilidiella diplodiella</b></i> (white rot)
Shriveled grape berry covered with ripe whitish pycnidia. <i><b>Pilidiella diplodiella</i></b> (white rot).
Shriveled grape berry covered with a high density of pycnidia. <i><b>Pilidiella diplodiella</i></b> (white rot)
Detail of mature pycnidia of <i><b>Pilidiella diplodiella</i></b> observed on grape berry using a binocular magnifying glass (white rot).
More or less advanced symptoms of white burp on a branch in the vineyard (classic lesion on a branch on the left, canker lesion on the right). <i><b> Pilidiella diplodiella </b></i> (white rot)
Other aspects of more or less advanced symptoms of white burp on a branch in the vineyard (classic lesion on a branch located at the top, canker lesion at the bottom). <i><b> Pilidiella diplodiella </b></i> (white rot)
Brown to blackish lesion on young shoot starting around a knot. <i> <b> Pilidiella diplodiella </b> </i> (white rot)
The lesion is now firmly in place, it has surrounded the vine branch for several centimeters. <i><b>Pilidiella diplodiella</i></b>
Detail of a lesion caused by <i> <b> Pilidiella diplodiella </b> </i> on a vine branch. (white rot)
This young vine branch is weathered over a considerable length. <i><b> Pilidiella diplodiella </b></i> (white rot)
Young canker lying on a green twig. The bark begins to split in places. <i><b> Pilidiella diplodiella </b></i> (white rot)
Canker lesion lying on a green twig. Note the pronounced bursts of the bark. <i> <b> Pilidiella diplodiella </b> </i> (white rot).
Detail of mature grayish pycnidia produced by <i><b>Pilidiella diplodiella</i></b>on a lesion on a vine branch. (white rot).
Numerous blackish pycnidia have formed on this lesion on a vine branch. They are in greater number in the infractuosités. <i> <b> Pilidiella diplodiella </b> </i> (white rot)
The spores are released en masse from the pycnidia in the form of yellowish mucous formations. <i> <b> Pilidiella diplodiella </b> </i> (white rot)
Under the light microscope the central ostiole of the subglobular pycnidia is clearly visible. <i> <b> Pilidiella diplodiella </b> </i> (white rot)
Release of conidia by the ostiole of a <i> <b> Pilidiella diplodiella </b> </i> pycnidia (white rot).
Sectional view of a <i><b>Pilidiella diplodiella</i></b> pycnidia. We can clearly distinguish parallel conidiophores and young conidia (white rot).
Detail of several contiguous conidiophores at the end of which conidia have formed. <i><b>Pilidiella diplodiella</i></b> (white rot).
Appearance under a light microscope of young spores of <i> <b> Pilidiella diplodiella </i> </b> (white rot)
Photon microscopic appearance of mature <i> <b> Pilidiella diplodiella </b> </i> spores. Notice their brown color and the presence of a "central globular structure" (white rot)
A photonic microscope appearance of mature <i><b>Pilidiella diplodiella</b> </i> spores. Note their brown tint and the presence of a "central globular structure" (white rot).
Detail of a mature <i> <b> Pilidiella diplodiella </b> </i> spore. The central globular structure actually corresponds to a local depression of the spore (white rot).