DECATUR, Ill. (DTN) — A new survey shows soybean cyst nematode (SCN) is continuing to spread across the United States and into Canada.
New areas reporting SCN infestations are indicated by the blue areas on the map accompanying this article.
SCN moved into 55 additional counties in the U.S. in 11 states during the past three years. It has also been found in 24 new counties and rural municipalities in the Canadian provinces of Manitoba, Ontario and Quebec. The new regions paint a disturbing picture since most of the major soybean growing areas are already battling the pest (see red on map).
Greg Tylka, Iowa State University nematologist and co-leader of The SCN Coalition, gathered the new data on SCN’s spread by surveying plant health professionals at universities and departments of agriculture across the U.S. and Canada.
SCN is a sneaky adversary because despite being widely distributed and causing significant yield reductions, SCN often goes unnoticed in fields as yield losses are not always accompanied by visual symptoms.