Herbicide resistant weeds have been in the news quite frequently lately, and rightfully so. Their existence is changing how farmers currently manage weeds in corn and soybean fields. But resistance to pesticides is not limited to weeds. Fungi that cause crop disease can also develop resistance to fungicides. This presentation will cover the basics of fungicide resistance and outline ways to avoid or delay fungicide resistance from occurring. Some of this research is funded through the soybean check off from Iowa Soybean Association and the United Soybean Board. We thank our sponsors for this support.