Applying a fungicide, such as Stratego® YLD, can help prevent disease-related yield losses in soybeans.
Influenced by a variety of factors, yield-robbing foliar diseases can infect soybeans at any time during the season. The University of Arkansas Extension estimates aerial blight can reduce yields up to 50 percent, if not properly managed. Frogeye leaf spot, on the other hand, can cause yield losses of up to 30 percent, according to the University of Delaware Cooperative Extension.
“Disease often comes from spores that are in already in a field,” said Jim Dunphy, professor emeritus of soybean production and management at North Carolina State University. “Some diseases will go through several cycles in a growing season, infecting more plants as the season goes on.”
When growers use a combination of integrated pest management strategies to prevent losses, they are helping to preserve yield.
Practices to Prevent Yield Loss from Soybean Disease
Incorporation of host resistance, fungicides like Stratego YLD and cultural practices will help protect soybeans from tough diseases and yield loss. Some proactive measures growers can take include:
- Plant varieties that are disease-resistant
For disease prevention, growers should select a soybean variety with host resistance to the diseases commonly found in their fields or geographical region. However, they should be prepared to use additional management strategies as no soybean variety is resistant to all diseases.
- Apply a foliar fungicide
If caught early, Dunphy recommends growers treat diseases with a foliar fungicide application. Many soybean diseases, including strobilurin-resistant frogeye leaf spot, can be managed by fungicides with a triazole component, such as Stratego YLD. Using a fungicide with multiple modes of action is another good practice for effectively managing disease. To mitigate the resistance development, tank mix and rotate modes of action.
- Rotate crops from season to season
Most fungi that cause soybean disease can overwinter on soybean residue and survive from one growing season to the next. If possible, rotate to corn, cotton or rice to give the residue time to break down and for the pathogen to die off before soybeans are planted again.
- Use tillage to promote crop residue decomposition
In fields where it is core to the agronomic practices, tillage can reduce disease pressure in the upcoming crop by burying crop residue, quickening decomposition and reducing survival of disease pathogens.
Bayer Solutions for Managing Soybean Disease
For sustainable, long-lasting foliar disease control of frogeye leaf spot, aerial blight and brown spot, use Stratego YLD. It features two modes of action to deliver preventative and curative activity against disease for improved profit potential. With use rates as low as 4 fl oz/A, Stratego YLD is easy to handle, store and tankmix. As part of an integrated disease management program, Stratego YLD can be an integral strategy for preventing yield loss from soybean disease.
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