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Soybean Rust

Photos of the disease stages

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.

Early stage of development of soybean rust: upper leaf surface Figure 2
Early stage of development of soybean rust: upper and lower leaf surfaces and canopy.

Early stage of development of soybean rust: lower leaf surface
Early stage of development of soybean rust: canopy
 

Middle stage of development of soybean rust: upper leaf surface Figure 3
Middle stage of development of soybean rust: upper and lower leaf surfaces and canopy.

Middle stage of development of soybean rust:  lower leaf surface
Middle stage of development of soybean rust: canopy
 

Late stage of development of soybean rust: upper leaf surface Figure 4
Late stage of development of soybean rust: upper and lower leaf surfaces and canopy.

Late stage of development of soybean rust: lower leaf surface
Late stage of development of soybean rust: canopy
 

G4442, new December 2004

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G4442 Soybean Rust | Page 8 | University of Missouri Extension