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- W1991304849 abstract "Branch dieback is a common problem of Colorado blue spruce (Picea pungens f. glauca) in Michigan nurseries. Isolations from 100 cankers obtained from 20 seedlings exhibiting dieback symptoms all yielded Phomopsis occulta. Both mycelia and conidia of P. occulta were shown to cause branch dieback. Root pruning of spruce resulted in an increase in lesion lengths from 8.0 mm to 32.2 mm and an increase in the number of seedlings with girdling cankers from 50 to 90%. Current year's growth had longer lesions (42.9-64.3 mm) after mycelial inoculations than older tissue (9.0-32.2 mm) had. Wounding was required for infection by P. occulta mycelia but was not required for infection by conidia. The results show that P. occulta causes branch dieback in Colorado blue spruce, especially on young tissue and root-pruned seedlings" @default.
- W1991304849 created "2016-06-24" @default.
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- W1991304849 date "1995-01-01" @default.
- W1991304849 modified "2023-09-30" @default.
- W1991304849 title "A Phomopsis Canker Associated with Branch Dieback of Colorado Blue Spruce in Michigan" @default.
- W1991304849 doi "https://doi.org/10.1094/pd-79-0202" @default.
- W1991304849 hasPublicationYear "1995" @default.
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