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University of Guelph researcher Ryan Norris thinks neonicitinoid seed treatments on corn are reducing hatch of eggs that Monarch butterflies lay.
Although it’s only a three per cent reduction, he said it’s significant because it could total millions of larvae.
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Try refreshing your browser. Neonics may harm Monarch egg hatch: Guelph researcher Back to video
“It’s the first field evidence that neonics can have a negative impact on larval survival of monarchs,” Norris told CBC News.
Monarchs, which migrate every year between Canada and Mexico have prompted many studies because their numbers have declined by more that 80 per cent over the last two decades.