In 2002, residents of Detroit, Michigan noticed something was killing their ash trees. Ash trees in North America are susceptible to some diseases that can result in decline and mortality, so a forest disease specialist was dispatched to investigate why these trees were dying. It was soon determined that the culprit was not a disease, but an insect: a shiny, metallic-green, buprestid beetle not previously known from Michigan, or anywhere else in North America. Authorities in Michigan notified their Canadian counterparts who soon discovered numerous ash trees dying in Windsor, Ontario from damage caused by the same beetle. Eventually, with the help of a European systematist the insect was determined to be the previously described (and previously rare) Agrilus planipennis. Today, this insect is better known by its common name: the emerald ash borer.
To commemorate the discovery of emerald ash borer in North America, we organized a symposium and workshop at the 2013 Entomological Society of Canada’s and Ontario’s Joint Meeting in Guelph, Ontario. The timing and location of this workshop seemed appropriate because 2013 marked 10 years of research on the emerald ash borer and Guelph is located only a few 100 kilometres from where emerald ash borer was first found, and is now well within the insect’s Canadian range. Our goal with this symposium was to review the state of knowledge on emerald ash borer after ten years of research, and look ahead to the questions that researchers will be asking as the infestation continues to grow and spread. We were fortunate that many of the researchers who have contributed so much of what we know about emerald ash borer were able to participate.
We were quite pleased with how well the symposium turned out. However, information presented in a symposium is ephemeral and fades away as soon as the last talk is over. To prevent this, we imposed upon our presenters to also prepare written versions of their presentations. It took some time, but now these papers are all complete, and have been put together to form a special issue of The Canadian Entomologist dedicated to the emerald ash borer.
Emerald Ash Borer. Image credit: Chris MacQuarrie
Ten years is a long time in research. We estimated that over 300 papers on emerald ash borer had been produced over that period, with more being produced every month. It is our hope that this special issue can serve as an entry point into this literature for researchers new to the field. We also hope that this issue can be valuable to more established researchers as well, to use as a resource and a touchstone in their own work. This special issue can also serve as a reminder of how much effort is required (in both research and by people) to understand a new pest. What we have learned about emerald ash borer over the past ten years (well, 13 years now) is immense. There is still much to learn though.”
The Emerald Ash Borer special issue is the free sample issue of The Canadian Entomologist for 2015.