Skip to Main Content
U.S. Forest Service
Caring for the land and serving people

United States Department of Agriculture

Home > Search > Publication Information

  1. Share via EmailShare on FacebookShare on LinkedInShare on Twitter
    Dislike this pubLike this pub
    Author(s): Roger Magarey; Glenn Fowler; Manuel Colunga; Bill Smith; Ross Meentemeyer
    Date: 2008
    Source: In: Frankel, Susan J.; Kliejunas, John T.; Palmieri, Katharine M., tech. coords. 2008. Proceedings of the sudden oak death third science symposium. Gen. Tech. Rep. PSW-GTR-214. Albany, CA: U.S. Department of Agriculture, Forest Service, Pacific Southwest Research Station. pp. 269-275
    Publication Series: General Technical Report (GTR)
    Station: Pacific Southwest Research Station
    PDF: View PDF  (2.0 MB)

    Description

    We modeled Phytophthora ramorum infection using the North Carolina State University- Animal and Plant Health Inspection Service Plant Pest Forecasting System (NAPPFAST) for the conterminous United States. Our infection model is based on a temperature-moisture response function. The model parameters were: leaf wetness, minimum temperature, optimum temperature and maximum temperature over a specified number of accumulated days. The NAPPFAST weather database, which involves approximately 2,000 weather stations across North America, was used to generate a spatially interpolated climate match for P. ramorum infection at a 10 km2 resolution. The model was used to create maps showing the frequency of favorable years for infection, which were validated by comparison with historical P. ramorum observations from California in urban and natural settings. We then overlaid climate match areas for P. ramorum infection with hardwood forest density and understory host density to generate a composite risk map. We further increased the precision of the maps by applying masks that removed areas where: 1) no climate match occurred, 2) lethal cold soil temperatures for P. ramorum occurred, 3) no hardwood hosts occurred and 4) no understory hosts occurred. These maps are designed to improve the efficacy and economy of survey and detection activities for P. ramorum by federal, state and local regulatory agencies. We also generated global maps using the NAPPFAST system at a 55 km2 monthly resolution. Parameters used in the global model were: minimum average monthly temperature, maximum average monthly temperature and monthly precipitation. We used an air temperature lethal cold mask as a surrogate for soil temperature in the global model. These maps may assist in the search for the origin of P. ramorum.

    Publication Notes

    • You may send email to psw_communications@fs.fed.us to request a hard copy of this publication.
    • (Please specify exactly which publication you are requesting and your mailing address.)
    • We recommend that you also print this page and attach it to the printout of the article, to retain the full citation information.
    • This article was written and prepared by U.S. Government employees on official time, and is therefore in the public domain.

    Citation

    Magarey, Roger; Fowler, Glenn; Colunga, Manuel; Smith, Bill; Meentemeyer,Ross. 2008. Climate-Host Mapping of Phytophthora ramorum, causal agent of sudden oak death. In: Frankel, Susan J.; Kliejunas, John T.; Palmieri, Katharine M., tech. coords. 2008. Proceedings of the sudden oak death third science symposium. Gen. Tech. Rep. PSW-GTR-214. Albany, CA: U.S. Department of Agriculture, Forest Service, Pacific Southwest Research Station. pp. 269-275

    Keywords

    Infection, validation, climate, hosts, risk map

    Related Search


    XML: View XML
Show More
Show Fewer
Jump to Top of Page
https://www.fs.usda.gov/treesearch/pubs/29911