U of MN Extension

Volunteers use Biosurveillance to find Emerald Ash Borer

Amy Rager, Extension Educator, Fish, Wildlife & Conservation Education

December 2016 

Holding Cerceris

Holding a Cerceris

The Wasp Watchers Program is a citizen science project that engages volunteers in the biosurveillance of Emerald Ash Borer (EAB).  Emerald Ash Borer is an invasive wood boring beetle that has destroyed tens of millions of ash trees in over 20 states.  With the help of a harmless ground-nesting wasp (Cerceris fumipennis) that hunts wood-boring beetles like EAB, we can monitor for the presence of these destructive invasive beetles.  The female Cerceris wasps hunt for beetles in the trees and carry their prey back to underground nests to feed to their offspring.  Citizen scientist volunteers can intercept the foraging wasps using an aerial net and the beetle prey can be captured and identified to determine if EAB is present at that site.  Most monitoring sites are baseball fields.  The wasps prefer the sandy edges of the fields and are easy to monitor at these locations.  

Since the program began in 2014, we’ve engaged 91 Wasp Watcher volunteers.  Volunteers have given 639 hours to capture 344 buprestid beetles, search 351 new sites for Cerceris presence, and discover 59 known Cerceris nesting sites.  Cerceris wasps and Wasp Watchers captured EAB at Riverside Park in Minneapolis in July 2016.  All of the captured beetle specimens are identified by a taxonomist and are accessioned into the University of Minnesota Insect Collection.  As part of program outreach and volunteer recruitment, we have provided educational presentations for over 1,376 participants, teaching about the scope, spread, symptoms, and detection of EAB.

Wasp Watchers are looking for more volunteers to monitor sites, if you are interested please visit their website.

Wasp Watcher sites across MN

Wasp Watcher sites across Minnesota

© 2016 Regents of the University of Minnesota.  All rights reserved. University of Minnesota Extension is an equal opportunity educator and employer.  In accordance with the Americans with Disabilities Act, this material is available in alternative formats upon request. Direct requests to 612-624-1222.