Soybean Cyst Nematode (SCN) management:
Early detection and crop rotations
by Dale. I. Edwards, Department of Plant Pathology, University of
SCN is the most serious soybean pest in Illinois and other soybean producing
states. SCN can go undetected and reach damaging levels because it:
These factors, coupled with the preferred cropping system of growing soybeans
every other year in rotation with corn, allow populaitons to reach damaging
levels before they are detected. Farmers must learn to detect SCN early
and to manage populations above the economic threshold level.
is small and has below-ground feeding habits,
may not show above-ground symptoms under ideal growing conditions, and
produces symptoms that are similar to those expressed by other causes.
Young white females of SCN on field-grown soybeans - a diagnostic tool.
Our educational and research programs concentrate on early detection methods
involving field scouting and plant and soil sampling, and on management
practices that integrate nonhost crops and resistant soybeans. Our objectives
Educational programs are being intensified in northern Illinois, where
SCN is relatively new.
improve soybean health and yield,
reduce SCN populations,
maintain yield potentials of our resistant varieties, and
use control practices that are economical and safe to the environment.
SCN - resistant and -susceptible plants growing side-by-side.