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Read
what's new in our current regional forest health updates.
Watch
how to identify and control invasive forest plants.
Learn
about gypsy moth and other spring leaf-eating caterpillars.
Contact information
DNR forest health staff

Oak wilt guide

To obtain your oak wilt risk rating and associated guidelines, answer the five questions below then click Submit.

  1. Is oak wilt present in your county?

    Distribution of Oak Wilt

    F1. Oak wilt present in shaded counties (as of January 2017).

    Choose one of the responses below:
    Oak wilt not present in the county AND stand is NOT within 6 miles of county with oak wilt.
    Oak wilt present in the county or your stand is within 6 miles of a county with oak wilt AND oak wilt is not known to be in the stand.
    Oak wilt present in the stand.

  2. What time of the year do you propose cutting?

    Wisconsin climate regions by county
    F2B. Climate region by county.

    Choose one of the responses below:
    April 1 to July 15 (spring-mid summer, SPS) - south of tension zone.
    April 15 to July 15 (spring-mid summer, SPS) - north of tension zone.
    July 16 to Sept. 30 (mid summer - early fall, SEF) statewide.
    Oct. 1 to March 31 (fall-winter, FWN) if south of tension zone.
    Oct. 1 to April 14 (fall-winter, FWN) if north of tension zone.

    Note: If uncertain about tension zone location, please see Figure 2 (below).


    Wisconsin tension zone map
    F2A. Tension zone dividing the two climate regions in Wisconsin.

  3. What is the basal area (BA) of oak in the stand?

    Choose one of the responses below:
    15 square feet/acre or less
    15 to 35 square feet/acre
    greater than 35 square feet/acre

    Basal area can be found in your MFL plan. If your land is not enrolled in the MFL program please follow these instructions (exit DNR, PDF, 253KB) for estimating your BA.

  4. What is the general topography of the stand?

    Choose one of the responses below:
    Flat to rolling land or 0 - 12% slope.
    Hilly with valleys or > 12% slope.

  5. What is the general soil texture of the stand?

    Soil texture triangle
    F3. Soil texture triangle of various combinations of sand, silt and clay.

    Choose one of the responses below:
    Light textured (e.g. sandy, loamy sand, sandy loam, sandy clay loam, and loam)
    Heavy textured (sandy clay,clay, clay loam, silt, silt loam, silty clay loam, and clay loam)

    Note: The light and heavy textured soils were described by using the soil triangle, please see Figure 3 (to left).


Last revised: Saturday February 02 2013