Final diagnosis


Verticillium dahliae

Yellowing, drying out of several leaves, often the oldest ones. <i> <b> Verticillium dahliae </b> </i> (verticillium wilt)
One-sided wilting of the leaf blade accompanied by slight chlorosis. <b> <i> Verticillium dahliae </i> </b> (verticillium wilt)
Subsequently, the leaf blade necroses and dries up between the veins. <b> <i> Verticillium dahliae </i> </b> (verticillium wilt)
The vessels are discreetly yellowish; no gummy discharge takes place. <b> <i> Verticillium dahliae </i> </b> (verticillium wilt)
On these bases of branches cut longitudinally, the coloring of certain vessels is well marked. They have a rather diffuse brownish tint. <b> <i> Verticillium dahliae </i> </b> (verticillium wilt)
The whole of the vessels of this transversely cut branch are brown. <b> <i> Verticillium dahliae </i> </b> (verticillium wilt)
<i> <b> Verticillium dahliae </b> </i> forms whorled, hyaline and septate conidiophores with 3 or 4 verticillate <b> phialides </b> (16-35 x 1-2.5 µm) and hyaline, ovoid, unicellular <b> conidia </b>, measuring 2.5-8 x 1.4-3.2 µm. (Verticillium wilt)
Close-up on some conidiophores of <b> <i> Verticillium dahliae </i> </b> at the end of which ellipsoid conidia of this fungus are still present (verticillium wilt, <i> Verticillium </i> wilt ).
Aspect du mycélium et des conidies de <b><i>Verticillium dahliae</i></b> (verticilliose, <i>Verticillium</i> wilt).
Young colonies of <b> <i> Verticillium dahliae </i> </b> growing on nutrient medium in a Petri dish from sections of tomato stem vessels. (verticillium wilt, <i> Verticillium </i> wilt).