Final diagnosis


Plectosporium blight, Microdochium blight

Numerous small, white to creamy, elongated to diamond-shaped lesions dot the blade of this zucchini leaf. <b><i>Monographella cucumerina</b></i> (plectosporiosis)
Detail on zucchini leaf of tiny lesions that have a white to cream color and a diamond shape. Note that the limbus is more or less perforated at the level of the lesions. <b><i>Monographella cucumerina</b></i> (plectosporiosis)
Cankerous spots on the veins of a courgette leaf made up of small confluent lesions. <b><i>Monographella cucumerina</b></i> (plectosporiosis)
Detail of an extensive canker patch visible on the midrib of a zucchini leaf. <b><i>Monographella cucumerina</b></i> (plectosporiosis)
Elongated cankered lesions on veins and petioles of a courgette leaf. <b><i>Monographella cucumerina</b></i> (plectosporiosis)
Many zucchini leaf petioles show shallow, extensive beigeish patches. <b><i>Monographella cucumerina</b></i> (plectosporiosis)
Extensive beigeish superficial lesion on stem and petioles of zucchini. Note the presence of tiny beigeish spots riddled with the blades of certain leaves. <b><i>Monographella cucumerina</b></i> (plectosporiosis)
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