Great Estates Yard & Tree Home Page, Residential and Commericial Tree and Landscaping Services. Great Estates Yard & About Us Page, Servicing Central Minnesota, Minneapolis and St. Paul. Great Estates Yard & Tree ISA Arborist Page, Servicing Central Minnesota and Twin Cities Locations. Great Estates Yard & Tree has experience diagnosing and handling a variety of tree diseases. Great Estates Yard and Tree Contact Page. Free Tree Care and Landscaping Estimates.

   Minneapolis Tree Service with an ISA Certified Arborist on staff.  Licensed and  Insured Tree Care Company.  Experienced Tree Care Specialists serving Minnesota.

   Tree Care Company specializing in tree trimming or pruning, tree removal, stump grinding, storm damage and clean-up, cabling and bracing, tree and sod installation, shrub and hedge shaping, retaining walls, firewood, disease diagnosis,  and other tree and landscaping needs.

   Certified Tree Inspector.  Disease Diagnosis for Dutch Elm, Emerald Ash Borer, Oak Wilt, Gypsy Moths, Scales, and others tree diseases.


Emerald Ash Borer

The Emerald Ash Borer is an invasive beetle that attacks and kills ash trees. The adults are small iridescent green beetles that live outside of the trees during the summer months. Adult female ash borers lay their eggs on the bark of the ash trees. When the eggs hatch the larvae burrow under the bark and eat the living tissue they find there. As they do, they cut off the life giving channels that carry nutrients, water, and sugar to nourish the tree. After a few years, enough of the channels are cut off so the tree starves to death. Since its accidental introduction into North America, the Emerald Ash Borer has killed millions of ash trees in several eastern states. The effect of this beetle could be devastating to Minnesota ash trees as there is an estimated 900 million, making it a prime target for infestation. The Minnesota Department of Agriculture has now announced the discovery of this destructive tree pest found in May of 2009 in St.Paul. Minneapolis ash trees make up 20 percent of all trees on public and private land in the city. The Minnesota Department of Agriculture has issued a state quarantine on firewood, ash trees, and ash tree products in Hennepin and Ramsey counties to help slow the spread to other areas. Officials are urging Minnesotans to take steps to keep EAB from spreading.


The Emerald Ash Borer adult beetle is metallic-green and is a half inch long. They are active from May to September.

D-Shaped exit holes about one-eighth inch in size in ash tree bark.

S-Shaped galleries under the bark and/or segmented larva located by peeling back loose bark of an infested tree.

Crown decline with the top 1/3 dying first and then a progression down the tree with new shoots that may be produced lower on the tree.

Woodpecker holes could be an indication of the presence of this beetle as they love Emerald Ash Borer larvae. However, other insect larvae may also attract woodpeckers as well.

A number of declining ash in the area with similar symptoms may indicate infestation.


Do not purchase firewood from outside Minnesota. Always ask where the source of the wood came from before buying.

Do not transport firewood as it can hitch a ride when people move firewood and other wood products infested with the larvae.

Watch for signs of infestation in your ash trees and report them if you have any concerns. If you suspect your ash tree could be infested by EAB, visit the MDA Website and use the Do I Have Emerald Ash Borer, checklist.


There are several insecticide options available if you elect to treat your ash trees and research has shown that treatments can be effective. Studies have shown that it is best to begin using insecticides while ash trees are still relatively healthy. This is because the insecticide must be transported within the tree and the tree must be healthy enough to carry the insecticide up the trunk and into the branches and canopy. Beetles tunneling through the water conducting vessels hinder this process. Treating trees can be costly. If the tree is not deemed worthy of investing in long term, you should consider replacing it with an appropriate species. Left unprotected the tree will likely become a host for larvae in the future. Landscape trees typically increase property values, provide shade, and cooling, and contribute to the quality of the neighborhood. Replacing your ash now may give you a head start to a healthy tree in the future, especially if it was a less than desirable tree to begin with. These reasons should be considered in the decision making process for tree treatment.

Licensed Tree Service and ISA Certified Arborist serving the greater twin cities and central Minnesota, including: Minneapolis, St.Louis Park, Coon Rapids, Edina, Richfield, Bloomington, St.Paul, and more.

ISA Certified Arborist, Certified Tree Inspector, International Society Of Arboriculture