The Identification of a New Species, Diaporthe humulicola, a Pathogen Causing Diaporthe Leaf Spot on Common Hop

Common hop, Humulus lupulus, is a commercially important crop in the United States, with an increasing number of hop yards being established in the Northeast. In 2018, a new fungal disease was observed at two research hop yards in Connecticut. This new pathogen affected all hop cultivars being grown...

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Veröffentlicht in:Plant disease. - 1997. - 104(2020), 9 vom: 10. Sept., Seite 2377-2390
1. Verfasser: Allan-Perkins, Elisha (VerfasserIn)
Weitere Verfasser: Li, De-Wei, Schultes, Neil, Yavuz, Sumeyra, LaMondia, James
Format: Online-Aufsatz
Sprache:English
Veröffentlicht: 2020
Zugriff auf das übergeordnete Werk:Plant disease
Schlagworte:Journal Article Coelomycetes Diaporthaceae Humulus lupulus Phomopsis new pathogen
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520 |a Common hop, Humulus lupulus, is a commercially important crop in the United States, with an increasing number of hop yards being established in the Northeast. In 2018, a new fungal disease was observed at two research hop yards in Connecticut. This new pathogen affected all hop cultivars being grown and caused leaf spots and browning of cones. The causal organism was isolated and Koch's postulates were performed to confirm pathogenicity. The disease symptoms were similar to the previously described Phoma wilt; however, morphological and phylogenetic analyses placed the causal organism as a new species of Diaporthe. We propose the name Diaporthe humulicola. The disease increased under hot, humid conditions (around 24°C and 90% relative humidity), which prevail during the summer in the northeastern United States as well as other parts of the country. An in vitro preliminary assessment of fungicide sensitivity revealed that pyraclostrobin and boscalid inhibited D. humulicola growth in culture and should be further assessed for field efficacy against this new disease of hop. The proper identification and monitoring of this pathogen will be important to inform hop growers of this new threat 
650 4 |a Journal Article 
650 4 |a Coelomycetes 
650 4 |a Diaporthaceae 
650 4 |a Humulus lupulus 
650 4 |a Phomopsis 
650 4 |a new pathogen 
700 1 |a Li, De-Wei  |e verfasserin  |4 aut 
700 1 |a Schultes, Neil  |e verfasserin  |4 aut 
700 1 |a Yavuz, Sumeyra  |e verfasserin  |4 aut 
700 1 |a LaMondia, James  |e verfasserin  |4 aut 
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