The forest industry has been aerial spraying the herbicide glyphosate for decades. Glyphosate is a somewhat selective herbicide that kills many broad-leaved plants while having less effect on evergreens.
The rationale is that after spruces and jack pines are cut, hardwoods like poplar and birch compete with young conifers for sunlight and nutrients.
There are concerns with glyphosate. Environment North proposes that forestry companies seek alternatives to aerial spraying of glyphosate on Crown lands in Northern Ontario. About 50,000 hectares were sprayed in Ontario in 2015 and in 2016.
Source: The Chronicle Journal
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