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New Forests

, Volume 24, Issue 1, pp 67–79 | Cite as

Fusarium spp. and Pinus strobus seedlings: root disease pathogens and taxa associated with seed

  • C.M. Ocamb
  • J. Juzwik
  • F.B. Martin
Article

Abstract

Eastern white pine (Pinus strobus L.) seeds weresown in soil infested with Fusarium proliferatum, rootnecrosis developed on seedling roots, and F. proliferatumwas reisolated from symptomatic roots; thus, demonstrating thatF. proliferatum is pathogenic toeastern white pine seedlings. Soils infested with F.acuminatum or F. sporotrichioides resulted infew diseased seedlings. Seedlings with root rot generally showed reductions inseedling height. All Fusarium species tested wererecoveredfrom rhizosphere soil samples. Three seedlots of Pinusstrobus were examined for Fusarium infestation.Fusarium species were recovered from most seeds in twoseedlots. Fusarium proliferatum and F.sporotrichioides were the predominant species isolated. Additionalspecies not previously reported from P. strobus included:F. acuminatum, F. chlamydosporum,F. equiseti, F. graminearum,F. moniliforme, F. poae, F.polyphialidicum, F. heterosporum, F.sambucinum, and F. semitectum.

F. moniliforme F. oxysporum F. polyphialidicum F. proliferatum F. sporotrichioides Fusarium equiseti 

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Copyright information

© Kluwer Academic Publishers 2002

Authors and Affiliations

  • C.M. Ocamb
    • 1
  • J. Juzwik
    • 2
  • F.B. Martin
    • 3
  1. 1.Department of Botany and Plant PathologyOregon State UniversityCorvallisUSA
  2. 2.U.S. Department of AgricultureForest Service, North Central Research StationSt. PaulUSA
  3. 3.Department of Applied StatisticsUniversity of MinnesotaSt. PaulUSA

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