Friday, September 12, 2014

Emerald ash borer arrives is Sherwood resulting in quarantine for Calumet County

The quarantine means ash wood products and hardwood firewood may not be taken to areas that are not under quarantine.

Four more Northeast Wisconsin counties are under quarantine after an emerald ash borer was found near High Cliff State Park. The bug was found in Sherwood, just north of the High Cliff golf course and four miles from the Outagamie County line, the state Dept. of Agriculture, Trade and Consumer Protection says. Besides Calumet County, Kewaunee, Manitowoc and Outagamie counties are now under quarantine. State and federal officials are also speaking with the Oneida Tribe about a quarantine on its reservation. Other quarantined counties in Wisconsin are: Adams, Brown, Buffalo, Columbia, Crawford, Dane, Dodge, Door, Douglas, Fond du Lac, Grant, Green, Iowa, Jefferson, Juneau, Kenosha, La Crosse, Lafayette, Milwaukee, Monroe, Ozaukee, Racine, Richland, Rock, Sauk, Sheboygan, Trempealeau, Vernon, Walworth, Washington, Waukesha and Winnebago.  Native to China, the insect was first documented in the U.S. in Michigan in 2004 and in Wisconsin in 2008, in Ozaukee County.

ID ash trees:
Ash tree branches and buds are opposite with a single bud at the endof the branch (terminal bud). Twigs are gray to brown and donot have a waxy coating. Leaves are compound, 8 to 12inches long, 5 to 9  leaflets/leaf. Leaves may be finely toothedor have smooth edges. The most common ash trees planted inthe landscape are white ash (Fraxinus americana) and greenash (Fraxinus pennsylvanica). Other native ash trees lesscommonly found include black ash (Fraxinus nigra) andblue ash (Fraxinus quadangulata). Black ashhas 7 to 11 leaflets and is found in wet woods; blue ash has 7 to 11 leaflets and distinctive 4-angled corky wings on the stem. White ash buds are paired with a leaf scar beneath thebud that looks like the letter “C” turned on its side. Greenash buds are paired with a leaf scar beneath the bud thatlooks like the letter “D” turned on its side (like a smile). Individual fruits are shaped like single wings and occur inclusters; many ash cultivars are seedless. Ash trees are abundant in Wisconsin, with estimates as high as 765 million trees in forests and over 5 million in urban areas. Ash is a component of three forest types in Wisconsin including 1) Elm / Ash / Cottonwood, 2) Northern Hardwood and 3) Oak / Hickory.

While other woody plants, such as mountain ash and prickly ash, have 'ash' in their name, they are not true ash (Fraxinus species). Therefore they are not susceptible to attack by emerald ash borer.

Emerald ash borers lay their eggs on the bark of ash trees in mid- to late summer. When the eggs hatch a week or two later, the larvae burrow under bark for the winter and feed, destroying the trees ability to take up nutrients and water. The trees eventually die and pose the danger of falling onto someone or something.

Recommendations to people who have ash trees on their property DATCP :

-Consider preventive treatments if your property is within 15 miles of a known infestation.

Emerald ash borer insecticide treatments available to homeowners
Active Ingredient
Type of application
Amdro Tree & Shrub Care Concentrate (D)

Bayer Advanced Tree & Shrub Insect Control II (D)

Bayer Advanced Tree & Shrub Protect & Feed (D or G)

Compare N Save Systemic Tree & Shrub Systemic Insect Drench (D)

Ferti-lome Tree & Shrub Systemic Drench (D)

Monterey Once a Year Insect Control II (D)

Ortho Bug B Gone year Long Tree & Shrub Insect Control (D)
Mid-April to mid-May
Soil Drench (D)
Granular (G)
Optrol (D)
Mid-April to mid-May
Early-Sept. to mid-Oct.
Soil drench (D)
Bayer Advanced Garden Tree & Shrub Protect & Feed II (D or G)
Mid-April to mid-May
Soil Drench (D)
Granular (G)
ACECAP 97 Systemic Insecticide Tree Implants
Mid-May to mid-June
Trunk Implant

-Keep a close watch for possible signs of EAB infestation: Thinning canopy, D-shaped holes in the bark, cracked bark, branches sprouting low on the trunk, and woodpeckers pulling at bark.

-Consider planting different species of trees that are not susceptible to EAB.

Large to Medium-sized Street/Urban Trees
*Acer × freemanii Freeman maple (hardy to zone 3b-4a, depends on cultivar)
Acer miyabei ʻMortonʼ State Street Miyabe maple (hardy to zone 4a)
Acer platanoides Norway maple (zone 4b), very invasive
*Acer rubrum Red maple (in acidic soils only!) (hardy to zone 3b-5b, depends on
Acer ʻWarrenredʼ Pacific Sunset maple (hardy to zone 4b)
*Celtis occidentalis Common hackberry (hardy to zone 3b)
Corylus colurna Turkish filbert (sensitive to road salt) (hardy to zone 4b)
Ginkgo biloba Ginkgo (plant male cultivars only: ʻAutumn Goldʼ, ʻFairmountʼ, ʻMagyarʼ,
 ʻPNI 22720ʼ (Princeton Sentry®), ʻSaratogaʼ, Shangri-La®(zone 4b)
*Gleditsia triacanthos var. inermis Thornless honeylocust (plant male cultivars only: ʻChristieʼ
(Halka™), ʻHarveʼ (Northern Acclaim®), ʻImpcoleʼ(Imperial®), ʻPNI 2835ʼ (Shademaster®), ʻSkycoleʼ(Skyline®), ʻSuncoleʼ (Sunburst®), ʻTrue Shadeʼ (hardy to zone 4a)
*Gymnocladus dioica Kentucky coffeetree (ʻEspressoʼ, ʻJ.C. McDanielʼ (Prairie Titan™
are males, no fruit) (hardy to zone 4a)
Phellodendron amurense ʻMachoʼ Macho Amur corktree (plant males only as females are invasive)
(hardy to zone 3b)
Phellodendron lavallei ʻLongeneckerʼ Eyestopper™ Lavalle corktree (male) (hardy to zone 4b)
Phellodendron sachalinense ʻHis Majestyʼ His Majesty Sakhalin corktree (male) (hardy to zone 3b)
*Quercus bicolor Swamp white oak (hardy to zone 4a)
Quercus × bimundorum ʻCrimschmidtʼ Crimson Spire™ oak (tall, columnar form) (hardy to zone 4b)
Quercus imbricaria Shingle oak (acidic soils only!) (hardy to zone 4b)
*Quercus macrocarpa Bur oak (hardy to zone 3a)
Quercus × macdenielli ʻClemonʼs Heritage oak (hardy to zone 4)
*Quercus muehlenbergii Chinkapin oak (hardy to zone 4b)
Quercus palustris Pin oak (hardy to zone 4b) (acid soils only!)
Quercus robur English oak ʻFastigiataʼ (Skyrocket®), ʻPyramichʼ (Skymaster®)(zone 5a only)
Quercus Rosehill Rosehill oak (hardy to zone 4b)
*Quercus × schuettei Swamp bur oak (hardy to zone 3b)
Quercus × warei ʻLongʼ Regal Prince oak (tall, columnar form) (hardy to zone 4b)
Taxodium distichum Baldcypress (hardy to zone 4b, use northern plant/seed source)
*Tilia americana American linden (sensitive to road salt) (hardy to zone 3a)
Tilia cordata Littleleaf linden (sensitive to road salt) (hardy to zone 3b)
Tilia × euchlora Crimean linden (sensitive to road salt) (hardy to zone 4b)
Tilia × flavescens ʻGlenlevenʼ Glenleven linden (sensitive to road salt) (hardy to zone 4)
Tilia ʻHarvest Goldʼ Harvest Gold linden (sensitive to road salt) (hardy to zone 3b)
Tilia ʻRedmondʼ Redmond linden (sensitive to road salt) (hardy to zone 4a)
Tilia tomentosa Silver linden (sensitive to road salt) (hardy to zone 4b)
*Ulmus americana American elm (DED resistant cultivars: ʻNew Harmonyʼ, ʻPrincetonʼ,
ʻValley Forgeʼ) (hardy to zone 3a)
Ulmus hybrids (hardy to zones 3-5) Hybrid elms (DED resistant cultivars: ʻFrontierʼ (zone 5), ʻHomesteadʼ, ʻMortonʼ (Accolade®), ʻMorton Glossyʼ (Triumph™), ʻMorton Plainsmanʼ (Vanguard™), ʻMorton Red Tipʼ (Danada Charm™), ʻMorton Stalwart; (Commendation™) (Zone 5), ʻNew Horizonʼ (zone 3b), ʻPatriotʼ (zone 5), ʻPioneerʼ (zone 5)
Ulmus japonica ʻDiscoveryʼ Discovery Japanese elm (hardy to zone 3)lmus parvifolia Lacebark elm (hardy to zone 5b)
Ulmus wilsoniana ʻProspectorʼ Prospector elm (hardy to zone 4)

Small Urban Area or Street Trees
Acer tataricum Tatarian maple (hardy to zone 3a)
Acer truncatum Shantung maple (hardy to zone 3b)
*Crataegus crus-galli var. inermis Thornless cockspur hawthorn (hardy to zone 4a)
Crataegus phaenopyrum Washington hawthorn (has thorns) (hardy to zone 4b)
Crataegus viridis ʻWinter Kingʼ Winter King hawthorn (very few if any thorns) (hardy to zone 4b)
Maackia amurensis Amur maackii (hardy to zone 4a)
Malus spp. (hardy to zone 4a) Flowering crabapple (choose from disease resistant cultivars below)
White flowers/red fruit: ʻAdirondackʼ, ʻGuinzamʼ (Guinevere®), ʻJewelcoleʼ (Red Jewel®), ʻKinarzamʼ (King Arthur®), ʻSutyzamʼ (Sugar Tyme®), Malus baccata ʻJackiiʼ, Malus sargentii ʻSelect Aʼ (Firebird®),
Malus sargentii ʻTinaʼ, Malus × zumi var. calocarpa
White flowers/yellow fruit: ʻBob Whiteʼ, ʻCinzamʼ (Cinderella®), ʻExcazamʼ (Excalibur™), ʻLanzamʼ (Lancelot®), ʻOrmiston Royʼ
Pink or reddish flowers/red to purplish-red fruit: ʻCamzamʼ (Camelot™), Malus sargentii ʻCandymintʼ, ʻCanterzamʼ (Canterbury™), ʻCardinalʼ, ʻJFS-KW5ʼ (Royal Raindrops®), ʻOrange Crushʼ, ʻParrsiʼ (Pink Princess®), ʻPrairifireʼ, ʻPrairie Maidʼ, ʻPurple Princeʼ
Weeping to semi-weeping form: ʻCoral Cascadeʼ, ʻLouisaʼ, ʻLuwickʼ, ʻManbeck Weeperʼ (Anne E.®), ʻMolazamʼ (Molten Lava®)
Prunus sargentii Sargent cherry (requires good drainage) (hardy to zone 4b)
Prunus ʻAccoladeʼ Accolade cherry (requires good drainage) (hardy to zone 4b)
Pyrus calleryana ʻAutumn Blazeʼ Autumn Blaze callery pear (hardy to zone 4b)
Syringa pekinensis Peking lilac (requires good drainage) (hardy to zone 4a)
Syringa reticulata Japanese tree lilac (requires good drainage) (hardy to zone 3a)
*Native to Wisconsin

-Call a professional arborist, and visit for detailed information.

-If you have an EAB-infested tree that you would like to use as firewood, be aware that EAB can continue to emerge from the wood for two years after cutting. To avoid spreading EAB, split and leave the wood to age near where you cut the tree for two summers. After two years of drying, EAB that may have been within the wood will have emerged or died. The aged firewood poses little risk of introducing EAB and you may move it freely within the limits of the quarantine.

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