Soybean bacterial pustule
scouted Sept. 15, 2021
- Scientific Name
- Xanthomonas axonopodis pv.glycines
- Background
- Soybeans in Greene county were scouted and observed 55% of the field was affected by widespread browning and yellowing, leaf spots, root rot, and wilting in random patches. The site is low area.
- Conclusion
- The issue was identified as Bacterial pustule, caused by Xanthomonas axonopodis pv. glycines. This disease caused pustules to appear on the upper and lower surface of leaves which can grow into large dead patches. The bacteria that causes the disease enters the plant through openings in the leaves and is spread through water. The disease can overwinter on surface crop residue or seeds and favors temperatures from 85-90 degrees fahrenheit when conditions are wet. Yield loss is not normally serious but the disease can be managed through the use of resistant soybean varieties, rotating soybeans out of infected fields until infested debris is decomposed, and avoiding damaging fields with equipment while the plants are wet.
- Resources
