ST. LOUIS (AP) — A plant pathogen that causes the tree-killing disease known as sudden oak death has been found in Missouri.

The St. Louis Post-Dispatch reports that the Missouri Department of Agriculture says it has found ramorum blight on rhododendron plants shipped to some retail nurseries in the state. The rhododendrons were shipped to Walmart and Rural King stores throughout Missouri, as well as the Springfield Home Depot, Stark Bros. Nursery Garden Center and Fort Leonard Wood PX.

Agriculture officials are urging those who bought rhododendrons or lilac plants of the known infected variet...