6th year - High yielding. Susceptible soybean variety 4 . Nonhost crops S oybean cyst nematode is an oblinate parasite. The nematode is unable to mature and reproduce in the absence of host roots. Alfalfa, corn, and oat are common nonhost crops grown in Iowa, and soybean cyst nematode densities decline similarly when these three crops are grown in infested fields.
T here are nematicides which are labeled for use against soybean cyst nematode.
These materials often do not give season long control. When applied at planting, the effect of the nematicides may last long enough to provide an economic yield benefit. By the end of the growing season, however, soybean cyst nematode numbers may be as high or higher than they were at planting. No nematicide will kill all soybean cyst nematodes in the soil. T he performance of the nematicide will depend on soil conditions, temperatures, and rainfall.