These are the historical maps for bertha armyworm populations in Alberta from 2009 to 2018.

2018 Survey Map

2017 Survey Map

2016 Survey Map

2015 Survey Map

2014 Survey Map (PDF, 2.9 MB)

2013 Survey Map (PDF, 723 KB)

2012 Survey Map (PDF, 568 KB)

2011 Survey Map (PDF, 434 KB)

2009 Survey Map