Disease
|
Treatment and Management Practices |
Seedling blight or Damping-off
|
- Plant resistant varieties
- Use of seed treatment with fungicide containing mefenoxan
|
Phytophthora root rot
|
- Plant resistant cultivars
- Use a fungicide seed treatment of Metalaxyl or use Metalaxyl in seed furrow
- Improve soil drainage
|
Rhizoctonia root rot
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- Implement use of a systemic fungicide seed treatment
- Promote good soil conditions that favor rapid seedling development
- Try to avoid herbicide or chemical damage
- Reduce soil compaction
- Be sure to plant seed at a proper depth, avoid planting to deep
|
Anthracnose
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- Plant pathogen-free seed
- Treat infected seeds with a fungicide
- After bloom spraying fungicides may be helpful
|
Asian soybean rust
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- There are no resistant cultivars currently available
- Detection is difficult for fungicide application
- Fungicide must be applied within 7 days of infection to reduce yield loss
|
Soybean mosaic virus
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- Plant resistant cultivars
- Use virus-free soybean seed
- In seed production fields remove symptomatic plants
|
Soybean cyst nematode
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- Plan a crop rotation that allows 2 or more years between susceptible crops
- Practice good weed control
- Plant resistant cultivars
- Try and avoid moving infested soil with equipment or seed
|
Bacterial blight
|
- Plant resistant cultivars
- Plant pathogen-free seed
- Implement a crop rotation system
- When at all possible avoid cultivation when foliage is wet
|
Brown spot
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- Plant pathogen-free seed
- Implement a crop rotation system
- Spray foliar fungicide at the growth stage R-3
- Plow under crop residue to help prevent infection of the crop the following year
|
Downy mildew
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- Implement a crop rotation system
- Plow under crop residue to prevent infection of the crop the following year
- Plant resistant cultivars
- Use a fungicide seed treatment
|
Sudden death syndrome
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- Implement a crop rotation system
- Delay planting as late as possible in the spring
- Implement the use of cultivars from more than one maturity group
- Manage Soybean cyst nematode to help prevent Sudden death syndrome
- Practice timely harvest
|
Charcoal rot
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- Implement a crop rotation system
- Implement a proper and adequate fertilization system
- If possible irrigate soil to keep soil moisture high
- Adjust seeding density and planting date to encourage early canopy closure
|
Stem canker
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- Plant a high quality, disease free seed
- Implement a crop rotation system, especially where full season soybeans are grown in a no-till or minimum till system
- For full season soybeans delay planting
- Plant resistant cultivars
|
Brown stem rot
|
- Plant resistant cultivars
- When a field is infected avoid using susceptible cultivars for 3 years
|
Pod and stem blight
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- Implement a crop rotation system
- For seedling blight use a seed-applied fungicide
- Use a foliar fungicide at a growth stage of R6 in seed production fields if risk of seed infection is high
- Practice a timely harvest
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