<em>Septoria tritici</em> Blotch in Wheat (IMAGE) Rothamsted Research Caption Around 70 percent of the fungicides used on wheat in Europe are aimed at controlling the fungal pathogen that causes Septoria leaf blotch, which can cut yields by up to 50 percent in humid and temperate areas. Credit Rothamsted Research Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.