Fifth Meeting of the IUFRO Working Party S07-02-09, Phytophthora Diseases in Forests and Natural Ecosystems - supplement to Volume 41

Fifth Meeting of the IUFRO Working Party S07-02-09, Phytophthora Diseases in Forests and Natural Ecosystems held 7-12 March 2010, Auckland and Rotorua, New Zealand.


This supplement to volume 41 of the New Zealand Journal of Forestry Science contains the proceedings of the Fifth Meeting of the IUFRO Working Party S07-02-09, Phytophthora Diseases in Forests and Natural Ecosystems. The meeting was held in Auckland and Rotorua, New Zealand, from 7 – 12 March 2010. As with all papers published in this international peer-reviewed journal, each paper in this supplement has been through a rigorous refereeing process. The papers in this supplement capture all aspects of research on Phytophthora from molecular genetics through to management.

Content Snapshots. Period: 1 January 2011 – 25 November 2011

  • NZJFS Vol 41S Acknowledgement to referees

    Published Online - 2015. [582.3 KB] (pdf).
  • Application of phosphonate to prevent sudden oak death in south-western Oregon tanoak (Notholithocarpus densiflorus) forests

    Kanaskie, A., Hansen, E., Sutton, W., Reeser, P., & Choquette, C.
    Kanaskie et al. (pp. S177-S187) evaluated the effectiveness of phosphonate application to prevent sudden oak death in tanoak trees. All the treatments reduced visible symptoms but did not prevent seedlings from becoming infected.
    Published Online - 25 Nov 2011. [1.2 MB] (pdf).
  • Progress of the Phytophthora ramorum eradication programme in south-western Oregon forests, 2001 - 2009

    Kanaskie, A., Hansen, E., Michaels Goheen, E., Osterbauer, N., McWilliams, M., Laine, J., Thompson, M., Savona, S., Timeus, H., Woosley, B., Sutton, W., Reeser, P., Schultz, R., & Hilburn, D.
    Kanaskie et al. (pp. S169-S175) monitored the spread of Phytophthora ramorum in Oregon forests between 2001 and 2009. During this period, the area quarantined expanded from 23 km2 to 420 km2.
    Published Online - 24 Nov 2011. [3.9 MB] (pdf).
  • Forest Phytophthora diseases in the Americas: 2007 - 2010

    Frankel, S. J., & Hansen, E. M.
    Frankel & Hansen (pp. S159-S167) review recent findings, policy, regulation, and management relating to tree disease caused by Phytophthora species in wildlands and nurseries of North and South America.
    Published Online - 23 Nov 2011. [892.0 KB] (pdf).
  • Quercus suber - Phytophthora cinnamomi interaction: a hypothetical molecular mechanism model

    Coelho, A. C., Horta, M., Ebadzad, G., & Cravador, A.
    Coehlo et al. (pp. S143-S157) have designed a hypothetical model that illustrates the initial events of the interaction between Quercus suber and Phytophthora cinnamomi.
    Published Online - 17 Nov 2011. [4.9 MB] (pdf).
  • Tracking populations of Phytophthora ramorum within trees and across the South-western Oregon tanoak (Notholithocarpus densiflorus) forest with DNA fingerprinting and the relative fitness of dominant and rare individuals

    Britt, J., & Hansen, E.
    Britt and Hansen (pp. S133-S141) used DNA fingerprinting to investigate the spread of Phytophthora ramorum in south-western Oregon forests. Their results indicate that there was a single founder genotype, which is being progressively diluted by new genotypes arising through mutation. They also found that P. ramorum populations in Oregon forest are genetically distinct from those in nurseries and in California forests.
    Published Online - 11 Nov 2011. [1.3 MB] (pdf).
  • A review of the catchment approach techniques used to manage a Phytophthora cinnamomi infestation of native plant communities of the Fitzgerald River National Park on the south coast of Western Australia

    Dunne, C. P., Crane, C. E., Lee, M., Massenbauer, T., Barrett, S., Comer, S., Freebury, G. J. C., Utber, D. J., Grant, M. J., & Shearer, B. L.
    Dunne et al. (pp. S121-S132) summarise a range of management techniques that have been used to contain an infestation of Phytophthora cinnamomi to the Fitzgerald River National Park on the south coast of Western Australia.
    Published Online - 3 Nov 2011. [2.3 MB] (pdf).
  • Comparing virulence of Phytophthora plurivora and P. pseudosyringae towards Fagus sylvatica seedlings using a method ensuring equal growth of both pathogens

    Dalio, R. J. D., Fleischmann, F., & Oßwald, W.
    Dalio et al. (pp. S115-S119) found that the greater aggressiveness of Phytophthora plurivora compared with P. pseudosyringae cannot be explained by its faster growth at a given temperature.
    Published Online - 2 Nov 2011. [905.9 KB] (pdf).
  • Phytophthora ramorum research at the National Ornamentals Research Site at the Dominican University of California

    Johnson-Brousseau, S., Henkes, M., Kosta, K., Suslow, K., Posadas, A. & Ghosh, S.
    Johnson Brousseau et al. (pp. S101-S113) describe the establishment and operation of the National Ornamentals Research Site (NORS) at the Dominican University of California (DUC). This special facility allows nursery research to be performed on quarantine pests and pathogens (such as Phytophthora ramorum) while safeguarding plant health and the environment.
    Published Online - 1 Nov 2011. [3.7 MB] (pdf).
  • Histology of Phytophthora ramorum in Notholithocarpus densiflorus bark tissues

    Giesbrecht, M., Hansen, E., & Kitin, P.
    Using various microscopic techniques, Giesbrecht et al. (pp. S89-S100) show that nearly all tanoak bark tissues are capable of being colonised by Phytophthora ramorum that this host responds to infection with callose deposition, tissue discoloration, and cell collapse; and that elicitins are present in cell walls of hyphae in infected bark tissues.
    Published Online - 25 Oct 2011. [5.7 MB] (pdf).
  • Recovery of Phytophthora species from drainage points and tributaries within two forest stream networks: a preliminary report

    Hwang, J., Oak, S. W., & Jeffers, S. N.
    Hwang et al. (pp.S83-S87) observed spatial and temporal variations in populations of taxa of Phytophthora within two forest stream networks. Sampling at the terminal drainage point of the main stream in a forest stream network detected all of the more common taxa present throughout the network but not for some taxa present at low population densities in the overall stream network.
    Published Online - 13 Oct 2011. [575.3 KB] (pdf).
  • The present state of knowledge on Phytophthora spp. diversity in forest and ornamental woody plants in the Czech Republic

    Černý.K., Tomšovský, M., Mrázková, M., & Strnadová, V.
    Černý et al. (pp.S75-S82) investigated the diversity and geographic range of Phytophthora species in the Czech Republic. Between 2006 and 2010, 16 species of Phytophthora species were detected and these were found on more than 20 host taxa.
    Published Online - 22 Sep 2011. [1.5 MB] (pdf).
  • Phytophthora species in tanoak trees, canopy-drip, soil, and streams in the sudden oak death epidemic area of south-western Oregon, USA.

    Reeser, P., Sutton, W., & Hansen, E.
    Reeser et al. (pp. S65-S73) report on Phytophthora species diversity and distribution in forest areas of south-western Oregon, USA. Phytophthora species were relatively rare in the forest landscape, except for the invasive species P. ramorum.
    Published Online - 16 Sep 2011. [1.3 MB] (pdf).
  • Phytophthora leaf blight - a new disease of California wax-myrtle (Morella californica) in Oregon, USA caused by a Phytophthora species.

    Putnam, M. L., Serdani, M., Curtis, M., & Angima, S.
    Putnam et al. (pp. S57-S63) report on a species of Phytophthora causing disease in California wax-myrtle plants in Oregon, USA.
    Published Online - 14 Sep 2011. [3.6 MB] (pdf).
  • Phosphite for control of Phytophthora diseases in citrus: model for management of Phytophthora species on forest trees?

    Graham, J. H.
    Graham (pp. S49-S56) reviews the use of phosphite for control of Phytophthora diseases in citrus plants and discusses the potential applicability for phosphites to control of Phytophthora diseases in forest trees.
    Published Online - 5 Sep 2011. [643.9 KB] (pdf).
  • Distribution and recovery of Phytophthora cinnamomi in soils of mixed hardwood-pine forests of the south-eastern USA.

    Meadows, I. M., & Jeffers, S. N.
    Meadows and Jeffers (pp. S39-S47) found the distribution of P. cinnamomi in soil at three sites to be the widespread and random to depths well below the surface. They also found that the recovery of P. cinnamomi from soil samples that had been dried and then remoistened was very rare.
    Published Online - 25 Aug 2011. [771.6 KB] (pdf).
  • How do Phytophthora spp. de Bary kill trees?

    Davison, E. M.
    Davison (pp. S25-S37) reviews possible mechanisms for how Phytophthora spp. kill trees, together with different hypotheses of why trees die, and the predisposing environmental stresses that contribute to tree death.
    Published Online - 28 Jul 2011. [670.9 KB] (pdf).
  • Effect of temperature on survival of Phytophthora kernoviae oospores, sporangia, and mycelium.

    Widmer, T.
    Widmer (pp. S15-S23) found that some oospores of Phytophthora kernoviae can survive in sand for at least a year at temperatures up to 30 oC but individual sporangia and mycelial fragments do not survive in sand at 30 oC for more than 1 or 2 weeks, respectively. Persistence of P. kernoviae in soil at lower temperatures is most likely related to the ability to produce new propagules (oospores and sporangia).
    Published Online - 15 Jul 2011. [609.9 KB] (pdf).
  • COST Action FP0801 – established and emerging Phytophthora: increasing threats to woodland and forest ecosystems in Europe.

    Woodward, S., Vannini, A., Werres, S., Oßwald, W., Bonnants, P., & Jung, T.
    Through the European Cooperation in Science and Technology (COST) framework Action FP0801, scientists and disease-control experts are working on phytophthora in forest ecosystems with the overall aim of increasing understanding of the biology and ecology of Phytophthora species with potential to cause damage to European forestry.
    Published Online - 14 Apr 2011. [511.4 KB] (pdf).
  • Evaluation of a copper hydroxide-based algicide to eliminate propagules of Phytophthora spp. in naturally-infested streams in South Carolina, USA:
    a preliminary report.

    Meadows, I. M., Colburn, G. C., & Jeffers, S. N.
    Meadows el al. (pp. S3-S5) investigated the effects of season and temperature on the efficacy of an algicide containing copper hydroxide (Cu[OH]2) as the active ingredient on natural populations of Phytophthora spp. The algicide was effective in all five months and over a range of temperatures tested.
    Published Online - 25 Mar 2011. [482.0 KB] (pdf).
  • Guest Editorial

    Dick, M. A., & Ramsfield, T. D.
    Published Online - 24 Mar 2011. [435.5 KB] (pdf).