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Symptomology

Symptoms of soybean rust.

 

Symptoms of soybean rust on the lower side of leaf.

 

Symptoms of soybean rust on the upper leaf surface.

 

Symptoms of soybean rust as seen when held up to light.

 

Tan symptoms of soybean rust. Raised areas are pustules.

 

Art by Joel Floyd. APHIS.

 

Under magnification, using a compound microscope, more details can be observed. The top photo is a cross section of urendia bearing the urediniospores; bottom left shows the urediniospores; and the spores observed when in a micrograph using a scanning electron microscope (bottom right).

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