Final diagnosis


Pseudoidium neolycopersici (External powdery mildew)

Numerous white powdery spots are visible on many leaflets of this <b> <i> Oidium neolycopersici </i> </b> (powdery mildew) tomato plant.
A few powdery spots, white and circular, dot the blade of this leaflet. <b> <i> Oidium neolycopersici </i> </b> (powdery mildew)
The powdery white powdery mildew spots are now more numerous on this leaflet and cover it almost entirely. <b> <i> Oidium neolycopersici </i> </b> (powdery mildew)
Again, the development of powdery mildew on the leaf blade leads to the appearance of brownish necrotic lesions under the mycelial colonies. <i> <b> Oidium neolycopersici </b> </i> (powdery mildew, downy mildew)
The colonies have coalesced and the white felting now covers most of the leaf blade. <b> <i> Oidium neolycopersici </i> </b> (powdery mildew)
Generalized <b> <i> Oidium neolycopersici </i> </b> (powdery mildew) damage on all the leaves of this tomato plant.
The development of <b> Oidium neolycopersici </b> </i> on this tomato leaflet is quite remarkable because it takes place on and near the veins. (powdery mildew, powdery mildew)
Under the most advanced powdery mildew spots, the leaf blade begins to necrosis, discrete blackish necoric lesions are hardly visible <b> <i> Oidium neolycopersici </i> </b> (powdery mildew).
These two strongly oidized leaflets gradually turn yellow and necrotic. <i> <b> Oidium neolycopersici </b> </i> (powdery mildew, downy mildew)
Several circular colonies of <i> <b> Oidium neolycopersici </b> </i> are visible on the leaf blade, those producing numerous conidia, which are disseminated in particular by the wind. (powdery mildew, powdery mildew)
Oidium2
<b> <i> Oidium neolycopersici </i> </b> is morphologically characterized by the formation of an often single conidium at the end of its conidiophores measuring 22-46 x 10-20 µm. <b> External powdery mildew, white mold </b>
Oidium3
<b> <i> Oidium neolycopersici </i> </b> produces rather isolated hyaline conidia, ellipsoid to ovoid, measuring 22-44 x 10-20 µm. <b> Powdery mildew </b>
Oidium4