This web page contains information about the emerald ash borer in Kentucky. Go to Emeraldashborer.info for
regional and national information on this invasive insect. Report suspected infestations outside of the quarantine zone to the Office of the State Entomologist - (859) 257-5838. The newest confirmations of EAB in Kentucky (2013) are Bourbon, Carroll
County and Whitley County. State officials established a quarantine to regulate the transportation of
articles that could harbor the emerald ash borer. The 29 counties under quarantine
are Anderson, Bell, Boone, Bourbon, Boyd, Boyle, Bracken, Campbell, Carroll,
Fayette, Franklin, Gallatin, Garrard, Grant, Greenup, Hardin, Harrison, Henry,
Jefferson, Jessamine, Kenton, Oldham, Owen, Pendleton, Pike, Rockcastle, Scott,
Shelby, Trimble, Whitley, and Woodford.
Ky EAB Distribution and Quarantine
This web page contains information about the emerald ash borer in Kentucky. Go to Emeraldashborer.info for regional and national information on this invasive insect. Report suspected infestations outside of the quarantine zone to the Office of the State Entomologist - (859) 257-5838.
The newest confirmations of EAB in Kentucky (2013) are Bourbon, Carroll County and Whitley County.
State officials established a quarantine to regulate the transportation of articles that could harbor the emerald ash borer. The 29 counties under quarantine are Anderson, Bell, Boone, Bourbon, Boyd, Boyle, Bracken, Campbell, Carroll, Fayette, Franklin, Gallatin, Garrard, Grant, Greenup, Hardin, Harrison, Henry, Jefferson, Jessamine, Kenton, Oldham, Owen, Pendleton, Pike, Rockcastle, Scott, Shelby, Trimble, Whitley, and Woodford.Except under certain conditions, the quarantine prohibits regulated articles from being moved outside the quarantined area without a certificate or limited permit. A regulated article may be moved by the U.S. Department of Agriculture or the Kentucky Department of Agriculture for experimental or scientific purposes; may be moved in an enclosed vehicle or completely covered to prevent access by the emerald ash borer (through Sept. 30); may be moved directly through the quarantined area without stopping except for traffic conditions and refueling; may be moved if it is stored, packed or handled at locations that do not pose a risk of infestation; and may be moved if it has not been combined or commingled with other articles.
Emerald ash borer emergence begins when 450 to 500 degree days (base 50 F) have accumulated starting on January 1; peak adult activity occurs at about 765 dd. You can use this degree day calculator on the UK AG Weather web site to get information for your area. Select the station nearest you from the drop down menu, select 50 from the Base menu, and have the information returned to the screen. Accumulated degree days will appear in a table using temperature data up to the current date. An "F" will indicate that degree day totals beyond the current day will be calculated using historical daily high and low temperatures. Use the back arrow to return to this page.
Conservation of ash trees has been endorsed by the Coalition for Urban Ash Tree Conservation as a fundamental component of integrated pest management programs to manage the EAB in residential and municipal landscapes. Research on EAB management has identified cost-effective, environmentally-sound treatment options that can preserve ash trees though peak EAB outbreaks used in association with tree inventories and strategic removal / replacement of unhealthy ash. Follow this link to the complete Emerald Ash Borer Management Statement .
Up-to-date information on EAB insecticides, application protocols, and effectiveness can be found in Insecticide Options for Protecting Ash Trees from Emerald Ash Borer. Questions naturally arise on potential impacts of the systemic insecticides used for EAB management on the environment and non-target species. Follow this link to a publication that addresses this topic.
EAB adults are 3/8 to 1/2-inch long and very narrow (about 1/5-inch wide). The head is blunt, the body tapers noticeably at the end of the abdomen. The wing covers are emerald green; the top of the abdomen, visible when the wings are spread, is metallic purple-red.
Newly emerged adults are most active when it is warm and sunny. They feed for several days before mating, chewing irregular notches along leaf margins. Mated females will feed for another week or two before laying eggs in bark crevices or under bark flaps on the trunk. One female will lay between 60 and 90 eggs.
Many green insects can be confused with the emerald ash borer. The picture below (courtesy of the Missouri Dept Agriculture) shows an EAB along with several look-alikes. The line-up includes (top row L-R): EAB, a bark gnawing beetle (family Trogossitidae), Buprestis rufipes, green June beetle, and the caterpillar hunter. (bottom row L-R) Japanese beetle, a green tiger beetle, green stinkbug, dogbane beetle, and a metallic bee. The picture shows relative sizes and shapes of these insects.
EAB adults are capable of flying 1/2 mile or more per day but most spread from newly established sites seems to cover distances in the range of 100 yards. Long distance spread is the result of inadvertent spread by humans in infested firewood and unprocessed ash logs."
This CSI: Your ash trees brochure provides an easy-to-follow checklist to help recognize ash trees, EAB infestation symptoms, and emergence holes.
Emerald Ash Borer Frequently Asked Questions for Kentuckians provides information on the EAB in Kentucky.
This emerald ash borer field guide provides pictures of various life stages of the emerald ash borer, its damage, and identification of common ash species.
According to the Ky Division of Forestry, there are 130.9 million stems of white ash and 92.5 million stems of green ash in the Commonwealth. This USDA Forest Service Forest Inventory and Analysis map (above) shows the distribution of ash stems by county (darkest color = highest to lightest = lowest) based on a 2006 Forest Inventory and Analysis. Elliot county is not listed.
This USDA Forest Service list shows the numbers of ash stems by county with ranking.
Forest Inventory and Analysis Factsheet for Kentucky 2004 states that the elm-ash-cottonwood component is 6% of the Commonwealth's 11.7 million forested acres. This type has been defined as the lowland forests where American elm ( Ulmus americana ), green ash ( "Fraxinus pennsylvanica"), eastern cottonwood (Populus deltoides ") or silver maple (Acer saccharinum) comprise singly, or in any combination, the largest component of stocking. It occupies a large but irregular area on the floodplains and bottomlands of the north central United States. (Shifley and Brown 1978).
Based on a 2005 Lexington street tree survey, ash species comprised almost 11% of about 51,000 street trees. It is estimated that there are more than 10,000 ash trees in the Urban Service Area (LFUCG 2007).
The ash component of Louisville's tree population is 17%. About 5% of the trees in the Waterfront Development are ash. (Louisville City Arborist and Management of Waterfront Development).
|UK Entomology Program Participants|
|John Obrycki, Department Chair and State Entomologist|
|Lynne Rieske-Kinney, Research, Forest Entomologist|
|Lee Townsend, Extension Entomologist|
|Joe Collins, Senior Nursery Inspector|
|Carl Harper, Senior Nursery Inspector, CAPS|
|Janet Lensing, CAPS Survey Coordinator|
|Janet Lensing, CAPS Survey Coordinator|
|S-225 Ag Science North|
This page is maintained by Lee Townsend, Department of Entomology, University of Kentucky. Please send questions or suggestions to: Lee.Townsend@uky.edu