Effects of Cultivar Susceptibility, Branch Age, and Temperature on Infection by Botryosphaeriaceae and Diaporthe Fungi on English Walnut (Juglans regia)

Botryosphaeriaceae and Diaporthe fungi have been described as the main causal agents of branch dieback and shoot blight of English walnut (Juglans regia L.). To date, the effects of biotic and abiotic factors on disease development on this host are still poorly understood. Thus, the main goal of thi...

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Veröffentlicht in:Plant disease. - 1997. - 106(2022), 11 vom: 27. Nov., Seite 2920-2926
1. Verfasser: López-Moral, Ana (VerfasserIn)
Weitere Verfasser: Lovera, María, Antón-Domínguez, Begoña I, Gámiz, Antonio M, Michailides, Themis J, Arquero, Octavio, Trapero, Antonio, Agustí-Brisach, Carlos
Format: Online-Aufsatz
Sprache:English
Veröffentlicht: 2022
Zugriff auf das übergeordnete Werk:Plant disease
Schlagworte:Journal Article Diaporthe neotheicola Neofusicoccum parvum branch dieback epidemiology shoot blight tree nuts
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520 |a Botryosphaeriaceae and Diaporthe fungi have been described as the main causal agents of branch dieback and shoot blight of English walnut (Juglans regia L.). To date, the effects of biotic and abiotic factors on disease development on this host are still poorly understood. Thus, the main goal of this study was to evaluate the effects of cultivar, shoot-branch age, and temperature on infection by Botryosphaeriaceae and Diaporthe fungi on English walnut. The susceptibility of eight commercial cultivars was evaluated against three Botryosphaeriaceae and two Diaporthe species. For the remaining experiments, shoots or branches of 'Chandler' were used. An initial experiment evaluating two inoculation methods was conducted, with inoculation with a mycelial plug being more consistent and useful than conidial suspension inoculation. Cultivar susceptibility varied depending on the fungal species, with 'Chandler' being among the most tolerant cultivars for shoot infection. One-year-old shoots were significantly more sensitive for both Neofusicoccum parvum and Diaporthe neotheicola in comparison with 2- to 4-year-old branches. The effect of temperature on shoot infection was evaluated under 5, 10, 15, 20, 25, 30, and 35°C. Lesion development was significantly higher for N. parvum isolates than for D. neotheicola isolates at all temperatures evaluated, with optimum temperature of shoot infection being ∼26°C for N. parvum and ∼21°C for D. neotheicola 
650 4 |a Journal Article 
650 4 |a Diaporthe neotheicola 
650 4 |a Neofusicoccum parvum 
650 4 |a branch dieback 
650 4 |a epidemiology 
650 4 |a shoot blight 
650 4 |a tree nuts 
700 1 |a Lovera, María  |e verfasserin  |4 aut 
700 1 |a Antón-Domínguez, Begoña I  |e verfasserin  |4 aut 
700 1 |a Gámiz, Antonio M  |e verfasserin  |4 aut 
700 1 |a Michailides, Themis J  |e verfasserin  |4 aut 
700 1 |a Arquero, Octavio  |e verfasserin  |4 aut 
700 1 |a Trapero, Antonio  |e verfasserin  |4 aut 
700 1 |a Agustí-Brisach, Carlos  |e verfasserin  |4 aut 
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773 1 8 |g volume:106  |g year:2022  |g number:11  |g day:27  |g month:11  |g pages:2920-2926 
856 4 0 |u http://dx.doi.org/10.1094/PDIS-09-21-2042-RE  |3 Volltext 
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