Eab treatment for my green ash

Asked March 15, 2017, 3:54 PM EDT

What is the injectable treatment available for treatment of the eab? Is it recommended for green ash?

Arapahoe County Colorado trees and shrubs

1 Response

As of the end of 2016, the only confirmed locations of Emerald Ash Borer are in central Boulder and one neighborhood in Longmont. Treatments are costly, have environmental hazards, and may not be completely effective so treatment of EAB in the Metro area is not recommended if there is no confirmed infestation.


EAB develops in the Fraxinus species (green ash, white ash). If there is a confirmed diagnosis of EAB, it can be treated in several ways: soil applications with systemic insecticides (imidacloprid, dinotefuran), non-invasive trunk sprays of systemic insecticides (dinotefuran), and trunk injections of systemic insecticides (emamectinbenzoate, azadirachtin). The healing of trunks from these injections varies depending on the health of the tree. More information about EAB:

https://www.colorado.gov/pacific/agplants/emerald-ash-borer

http://bspm.agsci.colostate.edu/files/2014/02/EAB-control-options-February-11.pdf


If you are seeing borer damage in your ash trees, it may be one of the other culprits: Lilac-Ash Borer, Ash bark beetles, Flatheaded appletree borers or Roundheaded borer. See the following CSU facts sheets for more information:

http://extension.colostate.edu/topic-areas/yard-garden/lilacash-borer-a-common-wood-borer-of-colorad...

http://extension.colostate.edu/topic-areas/insects/shade-tree-borers-5-530/


Finally, most borers attack only trees that are stressed due to drought, injury or disease. Promoting vigorous tree growth should be considered the primary approach for borer management. Trees that are shallow rooted or suffer from no winter watering can also have chronic borer problems.