Questions/Answers on Emerald Ash Borer (EAB)
What is the emerald ash borer?
It is a
very small, shiny green beet(½inch long ⅛ inch
wide; about the size of Mr. Lincoln’s image on a penny).
What does EAB eat?
species (and cultivars) of ash in the genus
Fraxinus. Hosts include green ash (e.g., ‘Marshall Seedless’, ‘Patmore’,and ‘Summit’), white ash
(e.g., Autumn Purple®)black ash, blue ash, and pumpkin ash.
Manchurian and Chinese ash trees are primary
hosts in its homeland [Eurasia]. Mountain ashes (
Sorbus species) are NOT hosts
Where is EAB from?
This beetle is native to Asia and is found in China and Korea. It also
Japan, Mongolia, the Russian Far East, and Taiwan.
EAB arrived in the United
States sometime before 2002 in wood packing materials.
How did it get to Burlington, Iowa?
Most EAB infestations in the United States have been
started by people unknowingly moving infested firewood, nursery plants, or sawmill logs. The
can fly short distances (2 to 5 miles).
be concerned about EAB?
It kills ash trees, usually in 2-
4 years. In the
Midwest, millions of ash trees have been killed by EAB since 2002.
There are about 700 ash trees
the public right-of-way in Burlington, and an estimated 2,000 ash trees on private properties.
How do I know if I have an ash tree in my yard?
Two sources to check on tree identification
How do I know if my
tree is infested?
Look for the following symptoms:
Thinning or dying branches in the top of the tree
Water sprouts (suckers) halfway up the trunk
Feeding notches on edge of leaflets
Woodpecker feeding sites/many bark flakes on lawn
S shaped feeding galleries under dead
D-shaped exit holes (1/8 inch diameter)
Who can help me determine if my tree is infested?
Contact local authorities
if you suspect
EAB in your tree:
City of Burlington
Iowa DNR Forestry,
Des Moines CountyExtension 319-394-9433
Who should be thinking about treating ash trees?
If you are a homeowner within 15 miles of
a known infested area you can evaluate the health of your tree and if it is healthy you can
consider treatment next year. If you are not in a known infested area we do not recommend
treatment at this time.
Ash Borer Management Options
Ash trees can be protected
with insecticide applied by a commercial pesticide applicator
or the homeowner. Trees must be healthy,vigorously growing, and valuable to your
Prepared by Mark Shour, Laura Jesse, and Donald Lewis, Iowa State University Extension and Outreach
Most of the treatments must be done each year for the life of the tree.
ctive due to past injuries to the tree, age of the tree, soil moisture, soil compaction,
and other site and environmental factors.
Preventive treatments are most effective.
less than 40% dieback of the
Preventive treatments for EAB are
recommended until a confirmed EAB site is 15
miles away. Treatment outside this risk zone is not prudent. This recommendation comes
from EAB researchers at Michigan State University.
Systemic insecticides require time
and active tree growth for distribution in the ash tree.
be applied in early spring to be effective
treatment may be required for larger trees.
are effective for
inches diameter). Larger tree treatments should be made by a commercial pesticide
applicator with experience in treating trees.
Canopy sprays are
recommended by ISU
Extension and Outreach
limited effectiveness, the need for spe
cialized equipment, spray drift, and possible
adverse effects to nontarget organisms.
If I am contacted by a pesticide applicator to treat ash trees for EAB at this time, what
course should I take?
to late summer
is TOO LATE to apply a treatment. Ne
April to mid
, IF you live within 15 miles of a confirmed EAB infested site, get
estimate for the treatment. Try to obtain at least one additional estimate before any work is done.
IF you live outside the risk zone, thank
or for showing
interest and keep
information on file.
Where else h
as EAB been found in Iowa
EAB has been found in two Iowa counties
One urban tree in Burlington was identified on July 10.
that EAB has come to Iowa, is there some plan to manage/contain this pest?
detailed plan has been developed by collaborative agencies. This plan provides the stepwise
actions to be taken to contain the pest, and the agencies responsible for the va
actions. The EAB Response Plan and other current Iowa information about EAB are given at:
What does an EAB quara
A quarantine by state and U.S. agriculture departments
means that hardwood firewood, ash logs, and wood chips cannot be moved out of the area
without a permit.
Homeowners must not remove their ash tree or firewood from their tree to an
side the quarantine.
Tree removal companies must not haul logs or firewood outside the
quarantine area unless inspected and treated as required by the regulations.
What should a homeowner or tree care company do with ash trees cut down in or near the
At this time the preferred disposal method is to u
e the wo
od within the
Des Moines County residents can dispose of wood waste (twigs, brush, limbs
and branches less than 8” in diameter) free of charge. Show proof of residency
and a current
statement of account information from the Burlington Municipal Water Company indicating trash
fees are paid to the City for “free” disposal. Otherwise, the disposal fee is $24/ton
just over a
penny a pound.
What general recommendations are
available to communities?
The Iowa Department of
Forestry Bureau has worked with several communities to deal with EAB
infestations. Contact Tivon Feeley (515
4915) or Emma Hanigan (515
5600) for more