The scientific name for emerald ash borerLearn more about this destructive, invasive insect.
Fraxinus is the genus name for all true Ash Tree species.UW Herbarium listing
Vertical splits in the bark are caused due to callus tissue that develops around larval galleries. Read more about this and other symptoms of emerald ash borer.
A reduction of leaves in the upper and outer branches of a tree. This can occur on many tree species and is a symptom of disease or insect infestations such as the emerald ash borer. Read more about this and other symptoms of emerald ash borer.
D-shaped exit (or emergence) holes
As adult EAB beetles emerge from under the bark they create an exit hole that is ~ 1/8 inch in diameter and D-shaped. This is one sign of the presence of emerald ash borer. Note: other, native, wood-boring beetles also create exit holes that are either much larger or round instead of D-shaped. Read more about this and other signs of emerald ash borer.
Detection Tree Survey
Used in detection surveys for emerald ash borer. A detection tree is an ash tree (preferably declining in health) that a surveyor girdles, or wounds, causing the tree to release beetle-attracting chemicals. The tree is then cut and peeled of its bark in search of the beetle. Read more about Wisconsin's detection survey programs.
This is a commonly used abbreviation for emerald ash borer.
Woodpecker damage that looks like strips of bark have been pulled off of the tree, due to large numbers of larvae under the bark.
Fraxinus americana (or F. americana)
White Ash Tree UW Herbarium listing
Fraxinus nigra (or F. nigra)
Black Ash TreeUW Herbarium listing
Fraxinus pennsylvanica (or F. pennsylvanica)
Green Ash TreeUW Herbarium listing
Fraxinus quadrangulata (F. quadrangulata)
Blue Ash TreeUW Herbarium listing
Immature life stage of emerald ash borer and also the destructive stage. Larvae are cream-colored, slightly flattened (dorso-ventrally) and have pincher-like appendages (urogomphi) at the end of their abdomen. Larvae eat on the tissues of an ash tree, underneath the bark, disrupting the tree's ability to move water and nutrients. Learn more and see pictures of an EAB larva.
Purple Panel Trap
Used as a survey tool to help detect the presence of emerald ash borer.Read more about Wisconsin's detection survey programs.
A quarantine is a system of rules administered by the USDA Animal and Plant Health Inspection Service and the WI Department of Agriculture, Trade and Consumer Protection. The rules are intended to help prevent the spread of EAB
S-shaped larval galleries
As larvae feed under the bark they wind back and forth, thus creating galleries that are packed with frass and sawdust and follow a serpentine pattern
Epicormic sprouting at the base and/or on the main stem of the tree
Visual detection surveys for the signs and symptoms of emerald ash borer are conducted from the ground