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Etiological investigations into chronic dieback of Fraser fir in New York State Christmas tree farms: site characterictics and the involvement of Phytophthora species 2012

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Project Leader: George Hudler, Plant Pathology and Plant Microbe-Biology, Cornell University

Cooperators:
Shawn C. Kenaley, Plant Pathology and Plant-Microbe Biology, Cornell University
Brian Eshenaur, NYS IPM, Cornell University

Abstract:

New York Christmas tree farmers recently reported unusually high numbers of dead and dying Fraser fir with symptoms similar to those caused by Phytophthora root rot and/or waterlogged soils. However, it is unclear whether high soil moisture or Phytophthora spp., individually or incombination, are responsible for the recurrent mortality events. The work presented herein is an interim progress report as we continue to investigate: (1) the identity of the Phytophthora spp. causing disease in NY Christmas tree farms; (2) the relationship(s) between selected site characteristics and tree health; and, (3) cultural and/or disease control solutions.