Delahaut, Karen, and Walt Stevenson. 2004. Tomato Disorders: Early Blight and Septoria Leaf Spot. University of Wisconsin-Extension. Accessed at: <http://learningstore.uwex.edu/Tomato-Disorders-Early-Blight-and-Septoria-Leaf-Spot-P546.aspx>
Tomato Disorders: Early Blight and Septoria Leaf Spot comes out of the University of Wisconsin Extension and was written by Karen Delahaut and Walt Stevenson. It is meant to provide growers with information on how to identify, prevent and control these diseases in their tomato crops. Early blight and septoria are diseases affecting the tomato and a few other crop and weed species often noticed after the plant sets fruit. Both diseases like moderate temperatures and periods of heavy rainfall. This publication looks at the symptoms and effects, the disease cycle, and control of both early blight and septoria diseases. See the 2010 publication out of the University of Wisconsin Extension Managing Late Blight in Tomatoes for information on late blight.