Known Distribution of the Soybean Cyst Nematode, <i>Heterodera glycines</i>, in the United States and Canada in 2020

In the United States and Canada, most damaging pathogen of soybean, Glycine max, is soybean cyst nematode (SCN), Heterodera glycines. Plant health professionals working for universities state provincial departments agriculture in Canada are queried periodically about counties rural municipalities that newly known to be infested with SCN their states provinces. Such a census was conducted 2020, results were compared recent survey, published 2017. Between 2017 55 new SCN-infested reported from 11 U.S. states. Also, 24 identified Canadian provinces Manitoba, Ontario, Quebec. A map distribution these two countries updated. The reveal steady expansion throughout pest almost certainly will continue spread among within soybean-producing areas future. Therefore, continued scouting soil sampling detection infestations warranted as first step toward successfully managing pathogen.