Final diagnosis


Phomopsis viticola (Excoriose)

Beginning attack of excoriose on a vine branch. <b> <i> Phomopsis viticola </i> </b>
This lesion induced by the attack of <b> <i> Phomopsis viticola </i> </b> blackens and begins to become necrotic and cankerous.
Concentration of early canker lesions at the base of a young vine branch. <b> <i> Phomopsis viticola </i> </b> (excoriose)
Several dark alterations more or less extensive dot this young branch. Some of them are starting to suck. <b> <i> Phomopsis viticola </i> </b> (excoriose)
This branch is surrounded at its base, over several centimeters, by a black superficial lesion with bluish reflections. <b> <i> Phomopsis viticola </i> </b> (excoriose)
Browning and suberization of an extended portion of a vine branch. <i><b>Phomopsis viticola</b></i>
The base of these two branches shows locally an epidermis more or less suberized and cracked over several centimeters. <b> <i> Phomopsis viticola </i> </b>
Vine branch surrounded for several centimeters by a large cracked canker lesion and more or less suberized. <b> <i> Phomopsis viticola </i> </b>
<b> <i> Phomopsis viticola </i> </b> causes the appearance of lesions that become chancery, the central tissues of the cortex thinning and cracking in places.
<b><i>Phomopsis viticola</i></b> (excoriose)
Several contiguous canker changes surround the base of this branch, weakening it somewhat. <b> <i> Phomopsis viticola </i> </b> (excoriose)
Many small dark to black masses, pycnidia, dot this section of a vine shoot. <b> <i> Phomopsis viticola </i> </b> (excoriose)
Several dark pycnidia are clearly visible on this portion of bleached wood. A more or less coiled whitish cirrh formed on some of them. <b> <i> Phomopsis viticola </i> </b>
Several black pycnidia are clearly visible on this portion of bleached wood. A more or less coiled yellow cirrh is visible on some of them. <b> <i> Phomopsis viticola </i> </b> (excoriose)
<b><i>Phomopsis viticola</i></b> (excoriose) 8
Presence of small brown and necrotic lesions along or near the primary veins resulting in the deformation of this leaf. <b> <i> Phomopsis viticola </i> </b>. (Excoriosis).
Small, brown, necrotic lesions that developed along or near the primary veins resulted in deformation of this <b> <i> Phomopsis viticola </i> </b> leaf. (<b> Excoriose </b>)
Brown and necrotic lesions are now more extensive. They are rather arranged along the primary veins and surrounded by a more or less marked chlorotic halo. <b> <i> Phomopsis viticola </i> </b>.
Blackish lesions, elongated, more or less extensive on the stalk caused by <i> <b> Phomopsis viticola </b> </i>
Phomopsis-vigne32
Table grape berries colonized rather recently by <i> <b> Phomopsis viticola </b> </i>; the affected tissues take on a purplish tint and the berries begin to shrivel.
These three berries of table grapes are more or less formerly affected by <i> <b> Phomopsis viticola </b> </i>.
Many blackish pycnidia are clearly visible on this table grape berry infected with <i> <b> Phomopsis viticola </b> </i>.
<b> <i> Phomopsis viticola </i> </b>: symptoms on berries Excoriosis
Grape berries affected by <i> <b> Phomopsis viticola </b> </i> turn brown. Excoriosis
These berries colonized by <i> <b> Phomopsis viticola </b> </i> have rotted and shriveled. (<b> excoriose </b>)
Detail of the small dark to blackish masses visible on this grape berry; these are pycnidia which formed under the film. <b> <i> Phomopsis viticola </i> </b>
Detail of a <b> <i> Phomopsis viticola </i> </b> pycnidia. We can clearly see the ostiole and the mass of hyaline conidia within this structure.
Inside this pycnidia, we can clearly see the many conidiophores which line it; conidia are formed at their ends. <b> <i> Phomopsis viticola </i> </b> (excoriose)
Many black pycnidia are clearly visible on this grape berry. A yellowish and globular mucus has formed on some of them. <b> <i> Phomopsis viticola </i> </b>
Dark pycnidia are clearly visible on this portion of bleached wood. A more or less coiled whitish cirrh formed on some of them. <b> <i> Phomopsis viticola </i> </b>
Appearance under a light microscope of an alpha spore cirrh of <b> <i> Phomopsis viticola </i> </b>.
Mixture of beta spores and less alpha spores of <b> <i> Phomopsis viticola </i> </b>
Mixture of alpha and beta spores of <b> <i> Phomopsis viticola </i> </b> (excoriose)
Appearance under a light microscope of alpha spores of <b><i>Phomopsis viticola</i></b>
The alpha spores of <b> <i> Phomopsis viticola </i> </b> are elliptical to fusoid; at the poles of these spores, there are two characteristic spherical formations, comparable to drops of oil.
The Beta spores of <b> <i> Phomopsis viticola </i> </b> are long, thread-like and arching.
Appearance under a light microscope of a cirrh of beta spores of <b> <i> Phomopsis viticola </i> </b>.
The pycnidia (a) of <b> <i> Phomopsis viticola </i> </b> produce two kinds of conidia: alpha ovoid to fusoid spores and beta spores, filiform and arched.
<b> <i> Phomopsis viticola </i> </b>: culture on agar medium; pycnidia appear in darker regions. They are dark and conidia come out in masses in the form of a creamy, yellowish mucus.