Final diagnosis


Sclerotinia sclerotiorum

<i><b>Sclerotinia sclerotiorum</b></i> on melon
<i><b>Sclerotinia sclerotiorum</b></i>1
Canker lesion on well-developed melon stem. It is almost completely covered by a dense white mycelium. An orange gummy exudate is clearly visible. (<i> Sclerotinia sclerotiorum </i>)
Sclerotinia1
<b><i>Sclerotinia sclerotiorum</i></b> on melon
Sclerotinia9
Wet lesion surrounding the stem of a melon stalk. Note the presence of the fungus' characteristic white mycelium and a salmon to orange gummy ooze. (<i> Sclerotinia sclerotiorum </i>)
Detail of the white mycelium of <i> <b> Sclerotinia sclerotiorum </b> </i>, and the gum exudate beading on the stem. (sclerotinia)
This canker on a more or less dry stem shows in places dark brown gummy exudates. <i> <b> Sclerotinia sclerotiorum </b> </i> (sclerotinia)
Wet lesion surrounding the stem of a melon stalk. Note the presence of the white mycelium of the fungus and some rough sclerotia. <i> <b> Sclerotinia sclerotiorum </b> </i>. (sclerotinia)
On this young moist and dark fruit, <i> <b> Sclerotinia sclerotiorum </b> </i> settled from the senescent floral parts. (sclerotinia)
A wet, scalloped rot started at the stylar end of this young melon which is now covered by <i> Sclerotinia sclerotiorum </i> mycelium. Note that an extensive lesion girdles the nearby rod. (sclerotinia)
Detail of a rot on melon fruit, the mycelium of <i> Sclerotinia sclerotiorum </i> and its sclerotia in the process of formation. (sclerotinia)
Both of these melons show an oily stylar rot. The one on the right is partially covered by a thick white mycelium; on the other, large black sclerotia have formed. <i> <b> Sclerotinia sclerotiorum </b> </i> (sclerotinia)
Beginning rot on the part of the melon in contact with the ground. <i> <b> Sclerotinia sclerotiorum </b> </i>.
A wet rot, initiated in contact with the wet soil, has almost completely invaded this melon. <i> <b> Sclerotinia sclerotiorum </b> </i>.
This completely rotten melon is somewhat deformed, shriveled, and covered with more or less mature sclerotia. <i> <b> Sclerotinia sclerotiorum </b> </i>.
This rotten, shriveled fruit is covered with elongated black masses: sclerotia of <i> <b> Sclerotinia sclerotiorum </b> </i>. (sclerotinia)
<i><b>Sclerotinia sclerotiorum</b></i> on melon
White mycelium and a few large black sclerotia have formed on this fruit with rotten and collapsed tissue. <i> <b> Sclerotinia sclerotiorum </b> </i>.
Detail of several elongated sclerotia of <i> <b> Sclerotinia sclerotiorum </b> </i>.
Apothecia bunch of <i> <b> Sclerotinia sclerotiorum </b> </i>. These structures materialize the sexual form of the fungus.
A few apothecia of <i> <b> Sclerotinia sclerotiorum </b> </i> have formed on sclerotia of this fungus present on the soil surface. (sclerotiniosis) (Thibaut CHESNEAU)