Heterodera glycines, the soybean cyst nematode (SCN), is the most important disease of soybean in the United States (Wrather and Koenning, 2006). Fifty-four counties in Wisconsin are infested with SCN and many fields suffer yield losses due to this pest. The most efficient and economical tactic to manage SCN is host resistance. Sources of SCN resistance for soybean group 0 – group 2 varieties derive from three sources, PI 548402 (“Peking”), PI 88788, and PI 437654. The PI 88788 source of resistance is the most common background in commercial varieties and it is effective for maintaining yield in fields with disease potential due to SCN.
Soil Science Extension
University of Wisconsin Madison