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First report of Diaporthe ambigua causing Phomopsis stem canker on sunflower in Argentina

Phomopsis stem canker, a disease emerging on sunflower (Helianthus annuus) in response to environmental change, has already been described in Argentina with Diaporthe helianthi as the main aetiological agent (Ridao et al., 1994). During a survey (2020-2021) in the Argentinian sunflower-growing regio...

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Main Authors: Colombo, Denis Nahuel, Corro Molas, Andres Ezequiel, Paniego, Norma Beatriz, Comerio, Ricardo Mario
Format: info:ar-repo/semantics/artículo
Language:Inglés
Published: Wiley 2023
Subjects:
Hongos
Organismos Patógenos
Girasol
Pathogens
Fungi
Sunflowers
Argentina
Phomopsis
Diaporthe
Cancro
Diaporthe ambigua
Online Access:http://hdl.handle.net/20.500.12123/14968
https://bsppjournals.onlinelibrary.wiley.com/doi/10.1002/ndr2.12204
https://doi.org/10.1002/ndr2.12204
Summary:Phomopsis stem canker, a disease emerging on sunflower (Helianthus annuus) in response to environmental change, has already been described in Argentina with Diaporthe helianthi as the main aetiological agent (Ridao et al., 1994). During a survey (2020-2021) in the Argentinian sunflower-growing region of Pampeane, 208 sunflower plants with canker symptoms were collected from 75 cultivated fields (Fig. 1). Necrotic triangular dark leaf lesions invaded the stem, forming a conspicuous brown to black canker at the corresponding nodes.

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