Final diagnosis


Alternaria tomatophila (alternariose)

Alternaria_solani1
Alternaria_solani2
Alternaria_solani3
On some of these brown spots, we can see a few discreet concentric patterns. Alternaria tomatophila (early blight)
02 Spots with small brown areas, consisting of concentric rings, giving them the appearance of a target. Alternaria tomatophila (early blight)
On the brown spots present on this leaflet, we can distinguish more or less concentric patterns. (<i> <b> Alternaria tomatophila </b> </i>) (alternaria)
Aged leaflet covered with brown, rounded spots causing yellowing. <i> <b> Alternaria tomatophila </b> </i> (alternaria, early blight)
Eventually, the leaflets dotted with numerous brown spots turn strongly yellow, and eventually dry out. <i> <b> Alternaria tomatophila </b> </i> (alternaria, early blight)
Small brown spots on the petiole, elongated, clearing up in the center (beginning of attack). <i> <b> Alternaria tomatophila </b> </i> (alternaria, early blight)
Stem lesions caused by <i> <b> Alternaria tomatophila </b> </i> (early blight). They appear dark brown and often adorned with concentric patterns.
Alternaria_solani4
Dark brown spot, depressed, discreetly zoned, sepals necrotic. <i> <b> Alternaria tomatophila </b> </i> (alternaria, early blight)
Necrotic sepals, concave (depressed) spots, located at the level of the fruit stalk, bearing a black mold. <i> <b> Alternaria tomatophila </b> </i> (alternaria, early blight)
After invading the sepals and the peduncle, <i> <b> Alternaria tomatophila </b> </i> colonizes this fruit and causes a brown to black and depressed circular deterioration (alternaria, early blight)
Alternariose-Tomate-WATT1
Conidiophores and conidia of <b> <i> Alternaria tomatophila </i> </b> can be observed under a light microscope on damaged tissue. The spores of this fungus, multicellular and elongated, are solitary and provided with a filiform hyaline extension. <b> Alternaria (early blight) </b
<i> <b> Alternaria tomatophila </b> </i> has a partitioned mycelium which gradually melanises with age. It produces short, septate and brown conidiophores on which often only a single conidium will form. The conidia are brown, multicellular and very elongated. They have a long hyaline appendage (beak), sometimes bifurcated and longer than the body of the spore, which is between 120 and 300 µm long (from the base to the end of the beak). <b> Alternaria (early blight) </b>
<i> <b> Alternaria alternata </b> </i> spores are produced in long chains at the end of conidiophores (<i> longicatenatae </i>). The conidia are brownish, multicellular and have a relatively short appendage (black mold rot, black mold rot).