You’re more likely to find SCN in areas that commonly have standing water and near waterways and field entrances. “Areas with higher pH have higher SCN reproduction, the higher the pH, the more likely you are to have higher populations,” Markell adds. “pH is more important than soil texture, but sandy soils can show more symptoms of nematode damage if the plant is water stressed.” Farmers in the “I” states and other areas with known SCN populations should actively manage the pest because it’s developing resistance to certain genetics. However, states where SCN is a new problem face challenges, too. “We’re taking nasty yield hits because not all varieties have resistance,” Markell says. “When growers plant a susceptible variety in fields with SCN we often see 30% to 40% yield loss in at least parts of the field.” Fringe soybean states that don’t have a history of SCN are at risk of higher yield losses because soybeans with genetic resistance could be less available. Test for nematodes now and in the fall and check roots throughout the season.