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New December 2004

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Contents

• History
• Symptoms
• Development
• Management
• Bacterial blight
  Pseudomonas savastanoi pv. glycinea
• Bacterial pustule
  Xanthomonas axonopodia pv. glycines
• Downy mildew
  Peronospora manshurica
• Frogeye leaf spot
  Cercospora sojina
• Septoria brown spot
  Septoria glycines
• Soybean rust
  Phakopsora pachyrhizi
• Photos of the disease stages
• Side by side comparison of soybean rust disease stages
• Side by side comparison of soybean diseases

Related publications

• M171, 2009 Missouri Pest Management Guide: Corn, Grain Sorghum, Soybean, Winter Wheat

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Soybean Rust

Side by side comparison of soybean rust disease stages

Figure 1
Soybean rust, especially in early stages, can be difficult to identify. Examine both upper and lower leaf surfaces, starting with leaves in the lower canopy of the plants.
 

G4442, new December 2004

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