On these young melon plants affected by Fusarium wilt, their cotuledons and the first leaves are chlorotic and wilted.  A brown lesion develops at the base of their stem.  <b> <i> Fusarium oxysporum </i> f.  sp.  <i>melonis</i> </b>
Symptoms of fusarium wilt on young melon plant.  <b> <i> Fusarium oxysporum </i> f.  sp.  <i>melonis</i> </b>.
Fusarium is now firmly in place on this melon plant.  Several leaves are now completely yellow, some have wilted and more or less withered away.  <b> <i> Fusarium oxysporum </i> f.  sp.  <i>melonis</i> </b>
Fairly quickly, larger portions of the leaf blade turn yellow, then wilt and dry out.  <b> <i> Fusarium oxysporum </i> f.  sp.  <i>melonis</i> </b>
Thinning of the veins and chlorosis of one half of the leaf (unilaterally) are often the first visible symptoms.  <b> <i> Fusarium oxysporum </i> f.  sp.  <i>melonis</i> </b>
<b><i>Fusarium oxysporum</i> f. sp. <i>melonis</i></b> on melon
<b><i>Fusarium oxysporum</i> f. sp. <i>melonis</i></b> on melon
Heterogeneous yellowing of the leaf blade giving this melon leaf the appearance of a mosaic not to be confused with that induced by a virosis.  <b> <i> Fusarium oxysporum </i> f.  sp.  <i>melonis</i> </b> (fusarium)
<b><i>Fusarium oxysporum</i> f. sp. <i>melonis</i></b> on melon
The blade of this melon leaf observed on a fusaria plant is uniformly discolored, the veins are also lighter.  <b> <i> Fusarium oxysporum </i> f.  sp.  <i>melonis</i> </b> (fusarium)
The leaves of this twig suddenly withered and withered, without turning yellow first.  <b> <i> Fusarium oxysporum </i> f.  sp.  <i>melonis</i> </b> (fusarium)
On the stem appear gum drops, often brown, preceding the development of a one-sided beige to brown deterioration.  Note that only one branch is affected for the moment.  <b> <i> Fusarium oxysporum </i> f.  sp.  <i>melonis</i> </b> (fusarium)
<b><i>Fusarium oxysporum</i> f. sp. <i>melonis</i></b> on melon
This portion of the stem shows a moist brown longitudinal lesion, covered in its center by a pinkish-white sporulation.  <b> <i> Fusarium oxysporum </i> f.  sp.  <i>melonis</i> </b> (fusarium)
<b><i>Fusarium oxysporum</i> f. sp. <i>melonis</i></b> on melon
<b><i>Fusarium oxysporum</i> f. sp. <i>melonis</i></b> on melon
One-sided browning of the stem of this melon accompanied by the emission of drops of gum which quickly brown when oxidizing.  <b> <i> Fusarium oxysporum </i> f.  sp.  <i>melonis</i> </b>
The lesion surrounds practically the entire stem, the tissues are rather necrotic, more or less oxidized gummy exudates bead in places, and <b> <i> Fusarium oxysporum </i> f.  sp.  <i>melonis</i> </b> sporulated locally.  (fusarium)
Upon weathering, the fungus may fruit as a whitish to pink mold.  <b> <i> Fusarium oxysporum </i> f.  sp.  <i>cucumerinum</i> </b> (vascular fusarium wilt of cucumber)
On this large necrotic lesion on the bottom of this melon stem, <b> <i> Fusarium oxysporum </i> f.  sp.  <i>melonis</i> </b> sporulated heavily.  We can clearly see the many pinkish-white sporodochia of the fungus partially covering the lesion.
<b><i>Fusarium oxysporum</i> f. sp. <i>melonis</i></b> on melon
Burnished vessels are also observed when a cross section is made in a stem recovered from a plant affected by Fusarium wilt.  <b> <i> Fusarium oxysporum </i> f.  sp.  <i>melonis</i> </b>
<b><i>Fusarium oxysporum</i> f. sp. <i>melonis</i></b> on melon
Marked browning of the vessels of this cucumber stem, necrosis of adjacent tissues.  <b> <i> Fusarium oxysporum </i> f.  sp.  <i>cucumerinum</i> </b> (vascular fusarium wilt of cucumber)
At first, the vessels are often marked brown.  <b> <i> Fusarium oxysporum </i> f.  sp.  <i>melonis</i> </b>
Subsequently, in addition to vascular browning, the pith turns brown and becomes spongy, as does cortical tissue.  <b> <i> Fusarium oxysporum </i> f.  sp.  <i>melonis</i> </b>
The roots located in the extension of the damaged vessels eventually turn brown and degrade.  <b> <i> Fusarium oxysporum </i> f.  sp.  <i>melonis</i> </b>
A more or less circular lesion is developing from the peduncle of this melon.  It is dark green at the periphery, and covered in its center by the pinkish sporulation of <b> <i> Fusarium oxysporum </i> f.  sp.  <i>melonis</i> </b>.  (fusarium)
<b> <i> Fusarium oxysporum </i> f.  sp.  <i>melonis</i> </b> also rapidly sporulated in the center of this young stalk lesion developing on a melon fruit.  (fusarium)
The stem rot is now well advanced, it is covered by a salmon pink mold.  <b> <i> Fusarium oxysporum </i> f.  sp.  <i>melonis</i> </b> (fusarium)
Several foci of dying plants are visible in this <b> <i> Fusarium oxysporum </i> f.  sp.  <i>melonis</i> </b>
<b><i>Fusarium oxysporum</i> f. sp. <i>melonis</i></b> du melon
<b> <i> Fusarium oxysporum </i> f.  sp.  <i>melonis</i> </b> forms macro and microconidia, as well as chlamydospores which ensure its dissemination and conservation.  (fusarium)
The culture of vessel fragments on nutrient medium in a Petri dish makes it possible to demonstrate <b> <i> Fusarium oxysporum </i> f.  sp.  <i>melonis</i> </b>.  Young colonies form from explants placed in culture (Fusarium wilt)