News & updates. The latest from the SCN Coalition.

The SCN Coalition is a public/checkoff/private partnership formed to help the agricultural industry speak with one voice about soybean cyst nematode management. Check out our latest updates and download supporting image resources here. root-illustration.png


Learn how scn is overcoming resistance. New animation demonstrates how soybean's best defense is faltering.

Soybean plants growing in fields across the United States and Canada are fighting a pest we thought was under control. After 20-plus years of relying on the same source of SCN resistance – PI 88788 – SCN is becoming aggressive, feeding and reducing bean yields as they overcome SCN resistance. Unfortunately, the PI 887888 source of resistance is used in 95% of all commercial soybean varieties. Watch a new video animation, produced by the SCN Coalition and learn more about this and what farmers can do to fight it.


The new scn coalition at commodity classic. Why it's more important than ever to take the test. Beat the pest.

Field tests prove that yield-robbing soybean cyst nematode (SCN) populations are rising and spreading, despite use of SCN – resistant soybean varieties. Listen to how successful growers — Ron Heck, Perry, Iowa, and Pat Duncanson, Mapleton, Minnesota — are activelly managing SCN in their fields. Dr. Greg Tylka, a leading nematologist from Iowa State University, moderates the discussion and advises growers to think of SCN like high blood pressure: no one magic bullet can manage high blood pressure or SCN. Taped at 2018 Commodity Classic, February 27-March 1, 2018, in Anaheim, California. 


Percentage of SCN populations in a state/province with elevated reproduction

Iowa State University Nematologist Urges Farmers to Refocus on Soybean Cyst Nematodes. SCN Coalition announcement.

Ames, Iowa (April 16, 2018) - Farmers preparing for spring planting would do well to renew their commitment to managing soybean cyst nematodes, according to an Iowa State University plant pathologist.
“I’m doing everything I can to convince farmers that we are on a slow-moving train heading towards a cliff," Greg Tylka said of the push to revive a program called the SCN Coalition.

Learn more 


NEW SCN COALITION URGES SOYBEAN FARMERS TO "KNOW THEIR NUMBERS." Research shows nematodes are becoming “resistant to the resistance.” 

Waukesha, Wis. (Feb. 28, 2018) – After a 20-year hiatus, the SCN Coalition is back encouraging soybean farmers to “Take the test. Beat the pest.” Like the predecessor, the new SCN Coalition is a public/checkoff/private partnership formed to help the agricultural industry speak with one voice about soybean cyst nematode management.

Download Release PDF 

Percentage of SCN populations in a state/province with elevated reproduction

Drop & Yield Graph

RESEARCH LED FORMATION OF NEW SCN COALITION. As SCN reproduction increases in farmers’ fields, yields decrease

Waukesha, Wis. (Feb. 28, 2018) – Analysis of soybean variety trials conducted by Iowa State University (ISU) shows conclusively that soybean cyst nematode (SCN) is adapting and reproducing on the PI 88788 resistance source – used in more than 95 percent of resistant soybean varieties – and yields are decreasing. Reversing this trend requires a comprehensive SCN management plan, a goal of the SCN Coalition.

Download Release PDF


no.1 yield robber. SCN tops the list of North American pathogens & diseases.

Soybean cyst nematode damage outpaces sudden death syndrome, seedling diseases and Phytophthora stem root rot, accounting for more than $1 billion in annual soybean yield losses in the U.S. and Canada #SCNcoalition root-illustration.png

No. 1 Yield Robber

Known SCN-infested Counties

KNOWN SCN-INFESTED COUNTIES. List continues to grow.

Soybean cyst nematodes impact almost every soybean growing area in the U.S. and are moving into Canada. In the U.S. alone,  70-80% of U.S. soybean-growing counties are impacted. An additional 34 new SCN-infested counties were identified from 2014-17. #SCNcoalition root-illustration.png