Emerald Ash Borer, Leah Bauer, USDA Forest Service Northern Research Station
Emerald ash borer (EAB) has not been detected in South Dakota.
The emerald ash borer was first detected in Michigan in July 2002 after it was accidentally shipped over in ash crates from China. It is a boring beetle that feeds on all species of North American ash, Fraxinus. Adults are about half an inch long, slender, and a metallic green color. They normally emerge from ash trees during June or July and leave behind D-shaped exit holes about 1/8" in size. The larvae are about 1 and 1/4" long, white, and segmented. EAB larva feeds on the tissues underneath the bark. As they move around to feed they create tunnels, also known as galleries, which inhibit the tree's ability to transport water and nutrients leading to the death of the tree. We are able to tell a tree has been visited by the beetle by the symptoms the tree show. This includes a thinning appearance of the canopy, sprouting from the base and trunk, bark splitting, increased woodpecker activity and the D-shaped exit holes. The adults fly off to feed and lay eggs in another ash tree, thus restarting the life cycle.
D-shaped exit hold, David R. McKay, USDA APHIS PPQ
The most common way EAB is spread is by moving ash firewood from infested areas to non-infested areas. Keep in mind that the beetle emerges from the wood in the summer months, so be sure to destroy or burn any out of state ash wood immediately. However, it is preferred that you use locally cut firewood to even further reduce the chances of spreading EAB. This would prevent EAB from having the chance to become established in South Dakota.
Emerald Ash Borer News
Not Time to Treat Ash Trees for EAB — Yet
June 21, 2016
PIERRE, S.D. – The recent find of the emerald ash borer (EAB) in Omaha, Neb., has renewed interest in the invasive insect. However, the borer has still not been found in South Dakota and residents are advised to hold off on treating their ash trees. Read more...
Emerald Ash Borer Found in Omaha, Still Not in South Dakota
June 13, 2016
PIERRE, S.D. – Emerald ash borer has been found in Omaha, Neb., but it still has not been found in South Dakota. Read more...