Emerald Ash Borer

The Emerald Ash Borer was discovered in Boulder on September 23, 2013.  The Emerald Ash Borer has an established track record of killing ash trees–all ash trees that become infected–since it began its march across the urban landscape of America and Canada in 2002.  Do you have an ash tree and are you worried about this threat?

How to identify an ash tree: http://emeraldashborer.info/files/E2892Ash1.pdf  (Note:  this does not include the Mountain Ash, which is not a true ash tree.)

1. Educate yourself on this pest.  Here are some general resources:

USDA-APHIS

National Invasive Species Information Center

EmeraldAshBorer.info

Colorado Department of Agriculture’s EAB Website  Bi-weekly updates available on the site.

CSU Entomology Professor Whitney Cranshaw’s Extension Fact Sheet on Emerald Ash Borer

City of Boulder’s EAB site

Think you have Emerald Ash Borer but just aren’t sure?  Check out this CSU Fact Sheet on EAB look-a-likes.

2.  Determine the threat.  Are you IN the quarantine area?  The current quarantine area is Boulder county.  Are you CLOSE to the infested area?   Check this map.

3.   If your ash tree is within an infested area, you will be faced with a decision to treat or not.  The EAB will kill untreated ash trees, and effective pesticide treatment is available.  Prophylactic treatment is expensive because it is ongoing. You may want to consider the cost of treatment – each ash will require treatment annually/biennially for the rest of its life.   It may make more sense to replace a small tree now than treat for decades.  If the ash is more than 30% gone from EAB, in the utilities line, not a healthy or beautiful tree, consider replacing.  Finally, consider that treatment makes the entire tree poison – roots, trunks, branches, leaves, pollen, and treatment requires keeping it poison for the rest of its life.  The treatment options are highly effective with EAB, but also kill another host of pollinators and beneficial insects.  You may decide that only specific highly valuable ash trees, or no ash trees, will be treated.

Utilize this tool, the Tree Benefit Calculator, to your advantage, but remember, IT DOES NOT INCLUDE ENVIRONMENTAL COST.  It is, indeed, heartbreaking to lose a large ash but is it better to wreak havoc on the rest of the ecosystem in a vain attempt to save it?Perform a cost-benefit analysis to determine if your ash tree is worth saving.

4.  Consider planting a replacement tree NOW.  Here is a list of trees recommended for the Front Range.  Front Range Tree Recommendation List.  Plant for diversity–avoid the next pest disaster.

5.  Get a second opinion or three.  Many tree experts in this area have weighed in on the subject.  Here is a compilation of some of their thoughts on preservation and treatment.

Whitney Cranshaw’s 2014 EAB Treatment Recommendation

Mikl Brawner–Harlequin’s Gardens web page and Colorado Gardener

6.  Consider Integrated Pest Management.  Don’t move firewood, logs or infested nursery stock!  Practice the timely removal of infected trees.

Emerald Ash Borer:  Homeowner Guide to Insecticide Selection, Use, and Environmental Protection  A nice publication from University of Minnesota Extension (and others)

North Dakota’s Guide

Apparently a woodpecker feast!

There is also a bit of work being done on fungi and parasitic wasps as predators of the borer.

7.  Assess your options for treatment recognizing that there are trade-offs to be made and the decisions made will have ramifications throughout the ecological system.

CSU Entomology Professor Whitney Cranshaw’s observations on Risk Assessment and EAB.

Insecticide Options for Protecting Trees from Emerald Ash Borer

Control Options for Emerald Ash Borer in CO

Insecticide Options for Protecting TREES from Emerald Ash Borer (Note:  not BEES!)

8.  Thoroughly evaluate your chemical controls if you have decided upon treatment as your preferred course of action.

Tree-Azin

Tree-age (Emamectin Benzoate)

Imidacloprid

Dinotefuran

Note that some products are sprayed or drenched, which are more prone to collateral death.  Others are injected, which requires drilling into the tree.  If you decide to treat, please apply when pollinators are not out and remove all flowers from around the tree.  Using a licensed arborist will help with label and legal compliance.

9.  Educate your neighbors.

10.  Educate your local government, HOA and schools.

While the CSBA recognizes the severity of the EAB threat, it is gravely concerned with the economic and environmental consequences of many of the pesticide choices.

 

 


Sponsors

Purchase Bee Hives and Packages from Plan B

Upcoming Events

May
30
Sat
4:00 pm Celebrate Boulder Being a Bee Sa...
Celebrate Boulder Being a Bee Sa...
May 30 @ 4:00 pm – 6:00 pm
Bee Safe Boulder invites you to attend a celebration in honor of Boulder becoming a bee safe city! Saturday, May 30th 4-6pm 3373 4th St, North Boulder Live Music • Hors d’oeuvres • Wine •[...]
Jun
3
Wed
6:30 pm SouthEast Beekeepers Club Monthl... @ North Pinery Firehouse
SouthEast Beekeepers Club Monthl... @ North Pinery Firehouse
Jun 3 @ 6:30 pm – 8:30 pm
The SouthEast Beekeepers Club is a fairly unstructured group of beekeeping people who get together once a month to share information, ask questions, get news, etc. Other than having a pot luck prior to and[...]
7:00 pm Boulder County Beekeepers Meeting @ Lefthand Grange
Boulder County Beekeepers Meeting @ Lefthand Grange
Jun 3 @ 7:00 pm – 9:00 pm
BCBA meeting and election scheduled for this Wednesday, April 22nd at 7:00 pm at the Niwot Grange. Our organization has been without meaningful leadership since Miles McGaughey stepped down last year. Philip Bradbury and Tim[...]
Jun
4
Thu
8:30 am Bee Guardianship Hive Doctor Cer...
Bee Guardianship Hive Doctor Cer...
Jun 4 @ 8:30 am – Jun 11 @ 12:30 pm
June 4-11 Boulder, CO Choose any dates that fit your schedule, 16 days to choose from. Intensives limited to 4 people per session. Out of town folks, we have recommendations for lodging and camping accommodations[...]
Jun
6
Sat
7:45 am Northeastern Kansas Beekeepers’ ...
Northeastern Kansas Beekeepers’ ...
Jun 6 @ 7:45 am – 5:00 pm
Saturday, June 6th, 2015 Registration: 7:45-8:45, Program 8:45-5:00 Douglas County Fairgrounds, 2110 Harper, Lawrence KS Fee includes lunch, beverages, snacks & homemade ice cream and a full day of fun! Bring your hat & veil[...]
9:00 am Beekeeping Seminar w/ Dr. Dewey ... @ Fort Lewis College
Beekeeping Seminar w/ Dr. Dewey ... @ Fort Lewis College
Jun 6 @ 9:00 am – 5:30 pm
Seminar details are found in this PDF
9:00 am Class IV: Honeybee Colony Care II @ Growing Gardens Greenhouse
Class IV: Honeybee Colony Care II @ Growing Gardens Greenhouse
Jun 6 @ 9:00 am – 12:00 pm
We will review how to maintain healthy colonies and what this looks like, and discuss how to recognize pests and diseases, and what you can do to support your bees. In the lab we will[...]
Jun
8
Mon
12:30 pm Central Colorado Beekeepers Meeting @ Crest Academy
Central Colorado Beekeepers Meeting @ Crest Academy
Jun 8 @ 12:30 pm – 1:30 pm
We meet the 2nd Monday of each month at 6:30 at 12th & G Street at Crest Academy, Salida, Co 81201. See our Facebook group: Central Colorado Beekeepers Association. Ask to join. Thanks and hope[...]
Jun
10
Wed
6:30 pm Brighton Beekeepers Monthly Meeting @ United Power HQ
Brighton Beekeepers Monthly Meeting @ United Power HQ
Jun 10 @ 6:30 pm – 8:30 pm
This month’s meeting will be held at the United Power Building on March 11th at 6:30pm. Miles McGaughey will be our guest speaker and will be covering topics relevant to this time of year. Other[...]
7:00 pm Mile Hive Bee Club @ Mercury Café
Mile Hive Bee Club @ Mercury Café
Jun 10 @ 7:00 pm – 9:00 pm
Hello Mile Hivers, April is here and we are already to the time for our April meeting. The Mile Hive will be meeting this WEDNESDAY April 8th from 7-9 at the Mercury Café. Many of[...]

View Calendar

Archives