Final diagnosis


Didymella lycopersici

<i> <b> Didymella lycopersici </b> </i> took advantage of these size wounds to penetrate along this rod. (<i> Didymella </i> stem canker)
<i> <b> Didymella lycopersici </b> </i> is the cause of this canker, dark brown to brown, which developed from a disbudding wound. (<i> Didymella </i> stem canker)
Tiny, globular, black structures dot the damaged tissue and carcaterize the parasitism of <i> <b> Didymella lycopersici </b> </i> (<i> Didymella </i> stem canker)
The tissues of this stem attacked by <i> <b> Didymella lycopersici </b> </i> eventually blacken and dry out (<i> Didymella </i> stem canker)
Several early brown spots develop on the leaf blade of this eggplant leaf. <i> <b> Didymella lycopersici </b> </i> (<i> Didymella </i> stem canker)
Small brown spots, with a well-defined outline, alter the blade of this leaf. A yellow halo stands out at the periphery. <i> <b> Didymella lycopersici </b> </i> (<i> Didymella </i> stem canker)
As we age, the altered lamina gradually necroses. These spots lighten in their center and some may merge. <i> <b> Didymella lycopersici </b> </i> (<i> Didymella </i> stem canker)
Eventually, part of the limbus at the periphery, completely dried out, ends up falling. <i> <b> Didymella lycopersici </b> </i> (<i> Didymella </i> stem canker)
A terme, une partie du limbe en périphérie, complètement desséché, finit par tomber. <i><b>Didymella lycopersici</b></i> (chancres à <i>Didymella</i>, <i>Didymella</i> stem canker)
Jonathan Gaudin (INRAE)
Jonathan Gaudin (INRAE)
Jonathan Gaudin (INRAE)
Jonathan Gaudin (INRAE)
Jonathan Gaudin (INRAE)
Brown, globular pycnidia are visible in the tissues. <b> <i> Didymella lycopercisi </i> </b> (<i> Didymella </i>, <i> Didymella </i> leaf spot)
Jonathan Gaudin (INRAE)
Brown, globular and ostiolate pycnidia are visible in the tissues. <b> <i> Didymella lycopersici </i> </b> (<i> Didymella </i> canker, <i> Didymella </i> foot rot)
This young <i> <b> Didymella lycopersici </b> </i> pycnidia, subglobular to elongated, will gradually become melanized (100 to 270 µm in diameter). There are numerous conidia all around. Let us add that this fungus can form perithecia (120-150 x 100 µm) at the origin of bicellular ascospores (16-18 x 5-6.5 µm). <b> <i> Didymella canker </i> (<i> Didymella </i> stem canker and fruit rot) </b>
The pycnospores are smooth and hyaline, oblong to ellipsoid, even obovoid, uni or bicellular. Their dimensions vary from one conidium to another (3-11 x 2-4.5 µm). <b> <i> Didymella lycopersici </i> </b> (<i> Didymella </i> canker, <i> Didymella </i> stem canker and fruit rot)