Minnesota First Detectors

What’s in Your Woodpile?

Minnesota First Detectors

Firewood Regulations

EAB quarantine = restrictions on regulated articles

Hardwood firewood = regulated article

Regulated articles cannot be moved out of quarantined areas unless accompanied by a MDA certificate

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Firewood Regulations

Quarantined Counties

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Firewood Regulations

Quarantined Counties

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Firewood Regulations

MDA certificates require an active compliance agreement with the MDA or USDA

Under the conditions of a compliance agreement, certificates may be issued for firewood that has been heat treated to specific temperatures in a kiln to render it safe

MDA certified firewood is allowed to move freely around the state

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DNR-approved Firewood Required on State- Owned Land

DNR lands have additional firewood regulations. Regardless of any quarantines, firewood must be either:

Obtained from a firewood distribution facility on State-owned land, or

Obtained from a firewood dealer approved by the DNR commissioner (with receipt)

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Minnesota First Detectors

Minnesota First Detectors

Softwood versus Hardwood

Softwoods have Tracheids (fibers), No Vessels (pores). Many have Resin Canals.

Resin Canals

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Softwoods versus Hardwoods

Hardwoods have Fibers and Pores

Pores

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Ring Porous versus Diffuse Porous

Large Pores in Earlywood and Small Pores in Latewood = Ring Porous Hardwood

Large, obvious lines are Earlywood.

Smaller,darker heartwood or lighter sapwood lines are Latewood.

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Ring Porous Wood: Black Ash

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Ring Porous Wood: Green Ash

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Ring Porous Wood: Bur Oak

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Ring Porous Wood: American Elm

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Semi Ring Porous: Black Walnut

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Ring Porous versus Diffuse Porous

Pores about same size and distributed evenly throughout growth ring = Diffuse Porous.

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Diffuse Porous Wood: Basswood

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Diffuse Porous Wood: Boxelder

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Diffuse Porous Wood: Big Toothed Aspen

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“Other” Features: Elm Bark Cross-Section

Layered Bark of American and Rock Elm

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“Other” Features: Long-Grain of Elm

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“Other” Features of Oak: Rays

Rays

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Versus, No Rays in Ash

Cracks or Checks, but not Rays

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“Other” Features: Elm and Hackberry

Both Have Wavy (tire track) summerwood

Hackberry

American Elm

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“Other” Features: Elm and Hackberry

Hackberry has Corky Ridges on Bark, no Layered Cross-Section

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“Other” Features: Red vs. White Oak

Sodium Nitrite turns White Oak Heart Wood Blue to Purple

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“Other” Features: Black Walnut

Medium brown to dark chocolate heartwood.

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Let’s Quiz the Log Splitter!

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Which log is hardwood?

Minnesota First Detectors

Which log is hardwood?

0%

0% 1. Log on the left2. Log on the right

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What is this?

Minnesota First Detectors

What is this?

0%

0%

0%

0%

0% 1. Oak2. Ash3. Walnut4. It’s hardwood; that’s all I need to know.5. I don’t know.

0 of 5

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What is this?

Minnesota First Detectors

What is this?

0%

0%

0%

0%

0% 1. Maple2. Oak3. Walnut4. Pine5. Don’t know.

0 of 5

Minnesota First Detectors

What is It?

Minnesota First Detectors

0%

0%

0%

0%

0%

What is it?

0 of 5

1. Hackberry

2. Chokecherry

3. Crabapple

4. River Birch

5. Chokeberry

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What is It?

Minnesota First Detectors

What is it?

0%

0%

0%

0%

0%

0 of 5

1. Birch

2. Cottonwood

3. Big-Toothed Aspen

4. Silver Maple

5. Black Cherry

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What is It?

Minnesota First Detectors What is it?

0%

0%

0%

0%

0%

0 of 5

1. Black Walnut

2. Buckthorn

3. Bur Oak

4. Boxelder

5. Ironwood

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What is It?

Minnesota First Detectors

0%

0%

0%

0%

0%

What Is It?

1. Cottonwood2. Green Ash3. Hackberry4. Elm 5. Linden

0 of 5

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What is It?

Minnesota First Detectors

0%

0%

0%

0%

0%

What is it?

0 of 5

1. Elm

2. Boxelder

3. Silver Maple

4. Ironwood

5. Linden

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What is It?

Minnesota First Detectors

0%

0%

0%

0%

0%

What is it?

0 of 5

1. Black Pine

2. Black Cherry

3. Austrian Pine

4. Douglas Fir

5. White Cedar

Minnesota First Detectors

What is It?

Minnesota First Detectors

What is it?

0%

0%

0%

0%

0%

0

5

1. Linden

2. Sugar Maple

3. Black Ash

4. Elm

5. Green Ash

Minnesota First Detectors