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Diaporthe phaseolorum var. sojae (Lehman) Wehmeyer
Mycologia, ASCOMYCOTINA, DIAPORTHALES, VALSACEAE .
Crops attacked:
soybean .
[R]Common Names : Pod blight,
This is the D. phaseolorum var. sojae that occurs in Europe.
Identification,
Description, Biology,
Epidemiology,
Treatement,
Possible misleading,
Images
[R]Identification
.
[R]Description
Around the nodes greyish discoloured spots occur which get covered by round, flat, dark picnidia (0,1 - 0,5 mm diameter) located between the fibers.
On the pods symptoms occur too and are visible but the picnidia are scattered; the seeds are wrinkled, grey, often sunken.
[R]Biology
.
[R]Epidemiology
.
[R]Treatement
Care should be taken when importing seeds.
Avoid introducing D. phaseolorum var. caulivora which is highly infective.
[R]Possible misleading
.
[R]
Images
- Phomopsis sojae , Soybean stem blight (GONDRAN J., INRA)
Soybean stem blight Stems dried up by Phomopsis sojae in a soybean field.
- Phomopsis sojae , Soybean stem blight (POINSO B., INRA)
Soybean stem blight Elongated spot of Phomopsis sojae with black little dots (pycnidia) on soybean stem at maturity stage.
- Phomopsis sojae , Soybean stem blight (GONDRAN J., INRA)
Soybean stem blight Comparison between a soybean stem infected by Phomopsis sojae and a healthy stem (see the difference in diameter).
- Phomopsis sojae , Soybean stem blight (POINSO B., INRA)
Soybean stem blight Detail of a pycnidia of Phomopsis sojae on soybean stem at maturity stage.
- Phomopsis sojae , Soybean stem blight (GONDRAN)
Soybean stem blight Perithecia of Phomopsis sojae showing long necks.
To read this page in French 
HYP3 on line : Species (scientific name), Diseases (common names), Glossary, Crops.
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