First report of neocosmospora falciformis Causing Wilt and Root Rot of Muskmelon in Spain

González, V. ; García-Martínez, S. ; Ruiz, J.J. ; Flores-León, A. ; Picó, B. ; Garcés-Claver, A.

Resumen: ‘Cantaloupe’ and ‘Piel de Sapo’ are melon (Cucumis melo L.) varieties cultivated in Spain. In 2018, during a pathogens survey in experimental fields of Valencia and Alicante provinces (southeast Spain), wilt and root rot of melon plants were detected in grafted and ungrafted plants. Disease incidence ranged from 10% (Alicante) to 45% (Valencia). Symptoms included yellowing and wilting of leaves, rotting at the stem base and upper root, and collapse of the entire plant. Samplings were conducted from severely decayed and dead plants. Fragments (0.5 to 1 cm) from rotted lower stems and roots were surface disinfected for 1 min in 1.5% NaOCl, washed twice with sterilized distilled water, and plated onto potato dextrose agar (PDA) with streptomycin sulfate (0.5 g/liter). Plates were incubated at 25°C in the dark for 3 to 5 days. Mycelia resembling Fusarium were isolated and characterized by morphological and molecular methods. Based on their adpressed beige mycelia, growth in concentric rings, and absence of sporodochia, colonies growing on PDA and Spezieller Nährstoffarmer agar were preliminary identified as belonging to the Fusarium solani species complex. On PDA, colonies were white-greyish to pale-cream growing in concentric rings with beige reverse after 6 days. No sporodochia were observed. Macroconidia were slender, falcate, hyaline, ...

Idioma: Inglés

DOI: 10.1094/PDIS-09-19-2013-PDN

Año: 2020

Publicado en: Plant Disease 104, 4 (2020), [3 pp]
ISSN: 0191-2917

Factor impacto JCR: 4.438 (2020)

Categ. JCR: PLANT SCIENCES rank: 29 / 235 = 0.123 (2020) - Q1 - T1

Factor impacto SCIMAGO: 0.663 - Plant Science (Q2) - Agronomy and Crop Science (Q2)

Financiación: info:eu-repo/grantAgreement/ES/MCIU-FEDER/AGL2017-85563-C2-1-R
Financiación: info:eu-repo/grantAgreement/ES/MCIU-FEDER/AGL2017-85563-C2-2-R

Tipo y forma: Artículo (PrePrint)