Final diagnosis


Botrytis cinerea

Numerous beige spots haloed with a yellow halo located at the edge of a zucchini leaf. <i><b>Botrytis cinerea</i></b> (gray mold)
Rotten petiole snag, covered with a gray mold which serves as a nutritive base for the parasitic fungus which will subsequently gain the stem of this zucchini. <b> <i> Botrytis cinerea </i> </b> (gray rot, gray mold)
Rotten petiole snag, covered with a gray mold which serves as a nutritive base for the parasitic fungus which will subsequently gain the stem of this zucchini. <b> <i> Botrytis cinerea </i> </b> (gray rot, gray mold)
Botrytis8
Botrytis9
A rot has developed at the end of the zucchini which becomes softer and deliquescent. <b> <i> Botrytis cinerea </i> </b> (gray mold)
Botrytis12
Botrytis10
Many arborescent conidiophores of <b> <i> Botrytis cinerea </i> </b> carry innumerable hyaline conidia which are easily dispersed by the wind. (gray mold)
The conidiophores of <i> <b> Botrytis cinerea </b> </i> are bushy and produce hyaline and ovoid spores. (gray mold)
Ovoid, hyaline to slightly brownish conidia of <i> <b> Botrytis cinerea </b> </i>. Mycelium is also visible. (gray rot)
<i> <b> Botrytis cinerea </b> </i> can be stored mainly as sclerotia several millimeters in length. First white, they turn brown over time. (gray mold)