August 7, 2020
Here is an overview of common soybean diseases and their stages throughout the season.
Stage I
| Stage II
| Stage III
|
| Fusarium Seedling Blight, Pythium Seed Decay/ Damping Off | ||
| Bacterial Blight, Bean Pod Mottle Virus, Soybean Mosaic Virus, Phytophthora Root and Stem Rot, Rhizoctonia Root Rot | ||
| Bacterial Pustule, Downy Mildew, Soybean Vein Necrosis Virus, Target Spot | ||
| Aerial Blight, Asian Soybean Rust, Cercospora Leaf Blight, Frogeye Leaf Spot, SeptoriaBrown Spot, Bleeding Hilum, Bud Blight (via Tobacco Ringspot Virus), Phomopsis Seed Decay, Pod and Stem Blight, Purple Seed Stain (via Cercospora), Anthracnose, Brown Stem Rot, Charcoal Rot, Sclerotinia Stem Rot (White Mold), StemCanker, Sudden Death Syndrome | ||
Seedling Diseases
Fusarium Seedling Blight (Stage I)
Photo courtesy of Darin Mueller, Iowa State University, Bugwood.org.
Pythium Seed Decay/ Damping Off (Stage I)
Foliar Diseases
Bacterial Blight (Stage I, II, III)
Bean Pod Mottle Virus (Stage I, II, III)
Photo courtesy of Edward Sikora, Auburn University, Bugwood.org
Soybean Mosaic Virus (Stage I, II, III)
Photo courtesy of Daren Mueller, Iowa State University, Bugwood.org
Bacterial Pustule (Stage II, III)
Photo courtesy of Daren Mueller, Iowa State University, Bugwood.org.
Downy Mildew (Stage II, III)
Soybean Vein Necrosis Virus (SVNV) (Stage II, III)
Target Spot (Stage II, III)
Aerial Blight (Stage III)
Photo courtesy of Dr. Padgett, Mississippi State University.
Asian Soybean Rust (Stage III)
Cercospora Leaf Blight (Stage III)
Frogeye Leaf Spot (Stage III)
Septoria Brown Spot (Stage III)
Root and Stem Diseases
Phytophthora Root and Stem Rot (Stage I, II, III)
Rhizoctonia Root Rot (Stage I, II, III)
Photo on left courtesy of Daren Mueller, Iowa State University, Bugwood.org.
Anthracnose (Stage III)
Photo courtesy of Daren Mueller, Iowa State University, Bugwood.org.
Brown Stem Rot (Stage III)
Charcoal Rot (Stage III)
Sclerotinia Stem Rot (White Mold) (Stage III)
Photos courtesy of Daren Mueller, Iowa State University, Bugwood.org.
Stem Canker (Stage III)
Sudden Death Syndrome (Stage III)
Pod and Seed Diseases
Bud Blight (via Tobacco Ringspot Virus) (Stage III)
Phomopsis Seed Decay (Stage III)
Photo courtesy of Daren Mueller, Iowa State University, Bugwood.org.
Purple Seed Stain (via Cercospora) (Stage III)
Picture courtesy of Adam Sisson, Iowa State University. Bugwood.org.