Emerald Ash Borer

Agrilus planipennis

Emerald ash borer (EAB), Agrilus planipennis is an invasive wood boring beetle from Asia that is predicted to infest all unprotected ash trees in the United States and Canada over the next 20 years. It spreads very quickly and has already killed tens of millions of ash trees since it was discovered in 2002. Emerald ash borer has been found throughout the upper Midwest as far east as Maryland and New York and as far west as Minnesota and Iowa.

Download Emerald Ash Borer Fact Sheet

Treatment Strategy

Emerald ash borer treatment depends on whether your tree is showing symptoms or is still healthy. Regardless of the treatment strategy, watering after treatment is important.

Treatment for Emerald Ash Borer - Healthy Tree

If your tree is important and valuable, and does not have a visible infestation, protecting from Emerald ash borer is both affordable and effective. Xytect™ is a professional strength insecticide for treating emerald ash borer that can be mixed with water and poured at the base of the tree. Annual treatments are required to maintain protection. This product can be applied from March through June or September through November, but the optimal treatment time is March through May. Start treatment for emerald ash borer when you are in a quarantined county and before symptoms appear.

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Emerald Ash Borer Treatment Option 1

Treatment for Emerald Ash Borer – Less than 30% Dieback

If your tree is showing symptoms of emerald ash borer infestation but there is less than 30% dieback, it is still possible to save your tree. However, it will be more expensive and there is a risk that treatment may not work. To maintain protection, apply annual treatments of Xytect™ in subsequent years.

Application Type - Soil drench

DIY Product/Equipment Needed:

• Xytect™

• Soil drench kit

• Measuring or diameter tape

• Bucket or watering can

Emerald Ash Borer Treatment Option 2

Transtect™(dinotefuran) is a fast moving insecticide for emerald ash borer that is applied to the soil at the base of the tree.

Application Type - Soil drench

DIY Product/Equipment Needed:

• Transtect™

• Soil drench kit

• Measuring or diameter tape

• Bucket or watering can

Emerald Ash Borer Treatment Option 3

Tree-Äge is injected directly into the trunk, and is effective for 2 years. You must have a pesticide applicator’s license to apply Tree-Äge because of its toxicity.

Application Type - Trunk Injection

Product/Equipment Needed:

• Tree-Äge

• Pesticide applicator’s license or hired professional

Emerald Ash Borer DIY Kit

Option 1

Application TypeSoil drench

DIY Product/Equipment Needed:

• Xytect™

Soil drench kit

• Measuring or diameter tape

• Bucket or watering can

Option 2

Application TypeSoil drench

DIY Product/Equipment Needed:

• Transtect™

Soil drench kit

• Measuring or diameter tape

• Bucket or watering can

Option 3

Application Type – Trunk Injection

Product/Equipment Needed:

• Tree-Äge

• Pesticide applicator’s license or hired professional

How Is It Spread?

Emerald ash borer lays its eggs on the bark of an ash tree and the larvae tunnel through the bark and begin consuming the sapwood of the tree. This feeding disrupts water flow to the canopy dehydrating and killing that portion of the tree. Eventually, the whole tree will die.

Susceptible Trees

Ash trees, including green ash trees.

Symptoms

Early infestations of emerald ash borer are nearly impossible to detect; the tree does not show outward symptoms. However as the infestation grows, the tree will decline and then die.

Emerald ash borer symptoms you will see as the infestation progresses:

• Early fall coloration

Dieback of branches with sparse foliage

• New branches sprouting from the lower trunk

• Woodpeckers feeding on infested trees

• D shaped exit holes

Decline in groups of ash all at the same time

Lookalikes

Drought, construction injury, anthracnose, other native ash borers

Related/Similar Problems

Drought, construction injury, anthracnose, other native ash borers

Timing

Spring or Fall

Urgency

High

Risk of Spreading

High

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