Final diagnosis


Ripe rot (colletotrichum spp.)

Several berries located in the central part of this cluster are more or less rotten, shriveled and purplish in color. <i> <b> Colletotrichum </i> sp </b>. (ripe rot)
On this completely rotten and shriveled bay, localized uplifts in the film can be distinguished in places corresponding to the locations of the acervuli. <i><b> Colletotrichum </i> sp</b>. (ripe rot)
Binocular aspect of mature acervuli surmounted by mucous masses made up of numerous agglomerated conidia, and shiny bristles: setae. <i><b> Colletotrichum </i> sp</b>. (ripe rot)
Completely rotten grape berry revealing the presence of fruited and therefore colored acervuli. <i> Colletotrichum </i> sp. (ripe rot)
On this grape berry, the skin of which is ruptured, the masses of spores formed by the acervuli appear in the form of an orange mucus. <i> Colletotrichum </i> sp. (ripe rot)
Detail of mature acervuli; we can clearly see the salmon-colored mucous masses and the brown bristles of a <i> <b> Colletotrichum </i> sp </b>. (ripe rot)
Appearance of an acervule in section on which we can distinguish the many conidia formed remaining agglomerated in mass. <i> <b> Colletotrichum </i> sp </b>. (ripe rot)
Formation of numerous conidia inside an acervule observed in section under a light microscope. . <i> <b> Colletotrichum </i> sp </b>. (ripe rot)
This acervule, endowed with several brown to blackish septate bristles, and surrounded by numerous hyaline conidia. <i> <b> Colletotrichum </i> sp </b>. (ripe rot)
Détail d'une soir noire cloisonnée et de conidies hyalines de <i><b>Colletotrichum</i> sp</b>. (ripe rot)
Concentration of conidiophores inside a young acervule of <i> <b> Colletotrichum </i> sp </b>. (ripe rot)
Detail of the formation of hyaline and guttulate conidia at the end of a conidiophore present in an acervule of <i> <b> Colletotrichum </i> sp </b>. (ripe rot)
Detail of hyaline and more or less guttulated conidia of <i> <b> Colletotrichum </i> sp </b>. (ripe rot)
In vitro aspect in Petri dish of fruitful acervules. <i> Colletotrichum </i> sp. (ripe rot)