Winter aids Alberta's fight with pine beetles

Winter and spring temperatures Western Canada were cold enough to help slow the spread of mountain pine beetles in Alberta's forests, according to the province's latest survey.

The cold weather destroyed a significant number of the tree-killing insects, but did not eliminate them, and Alberta remains threatened by beetles crossing the Rocky Mountains from British Columbia.

Beetle survival rates were low in most areas except in northwest Alberta, near Grande Prairie. Insects being carried by the wind from British Columbia remain a problem in southwest Alberta and the forests near Banff National Park.