Dactylonectria pauciseptata

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D. pauciseptata chlamydospores
Authors: Agustí-Brisach & Armengol
Source: Phytopathologia Mediterranea (2013)

Dactylonectria pauciseptata (Schroers & Crous) L. Lombard & Crous 2014

This fungus is widespread and associated with black foot disease of grapevine. It is one of several fungi that can cause this grapevine disease (Agustí-Brisach & Armengol, 2013). Other plants, especially trees, may also become infected by D. pauciseptata. The symptoms typically include necrotic roots, chlorotic foliage, vascular black lesions, wilting, and death of the plants or seedlings (e.g. see Piperkova et al., 2017).

D. pauciseptata produces macroconidia, microconidia, and chlamydospores. Macroconidia are straight with a size of ~ 40-50 x 10 µm, microconidia are nearly spherical and ~ 5 µm large, and chlamydospores are also nearly spherical, ~ 12 µm large, brown and often arranged in chains.

Cylindrocarpon pauciseptatum