Final diagnosis


Tomato powdery mildew

White, circular spots dot the leaves of this tomato plant. <i><b>Pseudoidium neolycopersici</b></i> (powdery mildew)
Several circular colonies produced by <i><b>Pseudoidium neolycopersici</b></i> dot these tomato leaflets. (oidium, powdery mildew)
Powdery and whitish spots, rather circular, sometimes confluent on tomato leaflets. <i><b>Pseudoidium neolycopersici</b></i> (powdery mildew)
Pseudoidium7
Pseudoidium4
The development of <b>pseudoidium neolycopersici</b></i> on this tomato leaflet is quite remarkable as it occurs on and near the veins. (oidium, powdery mildew)
Detail of a leaflet entirely parasitized by <i><b>Pseudoidium neolycopersici</b></i>. (oidium, powdery mildew)
Microscopie1.jpg
Young circular powdery colonies of <i><b>Pseudoidium neolycopersici</b></i> on tomato leaflet. These produce numerous conidia disseminated in particular by the wind. (oidium, powdery mildew)
Appearance under binocular microscope of sporulation of <b><i>Oidium neolycopersici</i></b> on tomato leaflet. Note the numerous erect conidiophores producing hyaline conidia in chains. <b>Oidium (powdery mildew)</b>
Aspect of several conidiophores produced by <b><i>Oidium neolycopersici</i></b> and observed under a light microscope. <b>External powdery mildew (powdery mildew, white mold)</b>