1,600 parasitic wasps released in Ontario, Quebec to fight off emerald ash borers - Technology & Science - CBC News

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By Justin Li, CBC News Ottawa, August 17, 2016

The Canadian Forest Service announced Wednesday it is releasing parasitic wasps in Ontario and Quebec this week in an effort to control the population of emerald ash borers.

Krista Ryall, a research scientist for the Canadian Forest Service, told CBC News that 1,600 of the non-stinging wasps native to China are meant to combat the emerald ash borers that have killed ash trees in more than 260,000 hectares of Ontario forests.