There are reports from Iowa State University Extension field crops specialists that there are lots of winter annual weeds in Iowa this spring. There is usually not much discussion about weeds serving as hosts for the soybean cyst nematode (SCN) because none of the common in-season weeds are hosts for the nematode in Iowa. In the late 1990s, Ohio State University researchers reported that the winter annual weeds field penny-cress, henbit, and purple deadnettle supported SCN reproduction in greenhouse experiments.