I'm not sure why you're linking all these when the disease has been identified to most likely be a prion disease, and not a side-effect of herbicides.
I used to work for the Ministry of agriculture there and we shared most of our data and procedures with Quebec's.
Québec land area: 1,365,128 km²
Québec total annual timber harvest: 4.8 million m³
New Brunswick land area: 71,450 km²
New Brunswick timber harvest from Crown lands: 5.4 million m³
New Brunswick timber harvest from private lands: 3 million m³
Québec protected areas alone are more than twice the size of the whole of New Brunswick.
What other populated region in North America is as intensely logged as New Brunswick? Maybe rural Oregon or Washington?