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|a 10.1094/PDIS.1997.81.10.1173
|2 doi
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|a eng
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|a Egan, A F
|e verfasserin
|4 aut
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|a Susceptibility of Ponderosa Pine to Endocronartium harknessii and Other Causes of Mortality in Pennsylvania
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|c 1997
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|a Text
|b txt
|2 rdacontent
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|a ƒaComputermedien
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|a ƒa Online-Ressource
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|a Date Revised 20.11.2019
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|a published: Print
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|a Citation Status PubMed-not-MEDLINE
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|a The effects of Endocronartium harknessii on provenances of Pinus ponderosa planted in 1969 on a coal strip-mine spoil bank in central Pennsylvania were reassessed. In 1982 infection levels among seed sources ranged from 4.9 to 52.5%. In 1991 infection levels ranged from 29 to 95%, and mortality due to rust infection ranged from 9 to 58% among these seed sources. Levels of infection, mortality due to rust infection, and mortality unrelated to rust infection differed significantly among seed sources (P < 0.001, < 0.001, and = 0.023, respectively). Among geographic ecotypes, there were no significant differences among percentages of trees infected (P = 0.094), but there were significant differences among trees surviving outplanting (P = 0.007), mortality due to rust (P = 0.004), and mortality unrelated to rust (P < 0.001). Only one provenance incurred less than 40% infection, indicating that virtually none of these types of provenances are suitable for reforestation in areas of eastern North America where E. harknessii occurs
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|a Journal Article
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|a Merrill, W
|e verfasserin
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|g 81(1997), 10 vom: 30. Okt., Seite 1173-1176
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|g pages:1173-1176
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