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231225s2021 xx |||||o 00| ||eng c |
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|a 10.1094/PDIS-02-21-0229-RE
|2 doi
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|a eng
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| 100 |
1 |
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|a Probst, Claudia
|e verfasserin
|4 aut
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| 245 |
1 |
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|a Factors Affecting the Infection of Sweet Cherry (Prunus avium) Fruit by Podosphaera cerasi
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|c 2021
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|a Text
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|a ƒaComputermedien
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|a Date Completed 30.12.2021
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|a Date Revised 31.05.2022
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|a published: Print-Electronic
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|a Citation Status MEDLINE
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|a Powdery mildew caused by Podosphaera cerasi is the most important fungal disease of sweet cherries in the Pacific Northwest of the United States. In this study, several factors related to disease epidemiology were evaluated. The experiments were conducted to investigate flower susceptibility to P. cerasi infection by in planta and in vitro inoculation. The susceptibility of fruit at various developmental stages was investigated using defined concentrations of P. cerasi conidia. Furthermore, the threshold of conidial concentration required for fruit infection was determined. The pathogen activity during full bloom was limited and not related to fruit disease incidence and severity at harvest. Foliar infections always preceded fruit infections by an average of 42 days during the 3 years of the study. The onset of fruit infection followed, on average, 66 days after full bloom and appeared simultaneously on all susceptible cherry cultivars in the research orchard. Disease symptoms were only observed on fruit in Biologische Bundesanstalt, Bundessortenamt, and Chemical Industry scale 8 (maturity) in all cultivars examined. During this stage, a concentration of 500 conidia/ml was sufficient to cause fruit infection at harvest. Interaction between the inoculation dates and conidial concentration revealed a dependency of disease development on the host stage at the time of inoculation; the younger the fruit, the more conidia are needed to cause disease at harvest. Molecular studies showed a rapid increase in conidia viability at the transition from asymptomatic to the symptomatic disease of fruit. No evidence of ontogenic resistance of fruit to powdery mildew infection was observed
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4 |
|a Journal Article
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|a Podosphaera cerasi
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| 650 |
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4 |
|a cherry powdery mildew
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| 650 |
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|a disease epidemiology
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| 700 |
1 |
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|a Pandey, Binod
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Swamy, Prashant
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|4 aut
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| 700 |
1 |
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|a Grove, Gary
|e verfasserin
|4 aut
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| 773 |
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|i Enthalten in
|t Plant disease
|d 1997
|g 105(2021), 10 vom: 20. Okt., Seite 2873-2879
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|x 0191-2917
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|g volume:105
|g year:2021
|g number:10
|g day:20
|g month:10
|g pages:2873-2879
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|u http://dx.doi.org/10.1094/PDIS-02-21-0229-RE
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