Rhizoctonia crown rot
scouted April 13, 2022
- Scientific Name
- Rhizoctonia sp.
- Background
- Soybeans in Perquimans county, variety Axis 3818 NRX, were scouted and observed 5% of the field was affected by browning, in random areas of the field. Vibrance Trio (Fungicide seed treatment, Inoculant, Exceed) and Broadaxe (pre-emergent 16 oz) were applied. Night temperatures were 45-46 degrees F after planting. Emergence is in high areas of field, 1.5-2 inches of rain in week following planting. The hypocotyl arch seems to be browning.
- Conclusion
- This issue was identified as Rhizoctonia Crown rot. The disease can occur under various moisture conditions, preferring warm and moist soil. It is more prevalent can be increased by plant stress from herbicide or hail injury or the soybean cyst nematode (SCN). To manage Rhizoctonia crown rot, it is recommended to encourage seedling health with good agronomic practices and the use of high-quality seed. Avoiding or reducing plant stress, such as from herbicide injury and SCN infection, is crucial. Crop rotation and tillage may be beneficial where disease has been severe. Some seed treatment fungicides can reduce Rhizoctonia infection for a few weeks after planting. However, no commercial corn or soybean cultivars are fully resistant to this disease.
- Resources
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- No resources have been added.
