Farm Progress

Choose products wisely to maintain fungicide performance when applying to corn and soybeans.

June 21, 2017

2 Min Read
FOLIAR APPLICATION: Understanding how various fungicides move through the plant can make all the difference in getting effective disease control. Use fungicide mixes that contain multiple modes of action.

Not all fungicides work to control disease the same way. Choosing the mode of action that best fits the disease will improve efficacy. Overusing the same mode of action can lead to fungal resistance and loss of performance. Making the best fungicide choice requires understanding how they work and how to rotate them to safeguard long-term effectiveness.

While multiple modes of action are important, it’s also crucial to choose products with effective modes of action, says Ryan Meisgeier, a technical sales agronomist with DuPont Crop Protection in northeast Iowa. Not all fungicides control disease in the same way, so you should properly identify pathogens and use products that will effectively control those diseases.

Fungicides are only effective when they are applied at the right time according to label instructions, he adds. A late application of a preventive fungicide when disease pressure is already heavy won’t be effective and can promote fungicide resistance.

He advises that you follow these management practices to help maintain fungicide efficacy:
• Use nonchemical disease management methods (plant disease-resistant seed varieties, use crop rotation).
• Use fungicide mixes that contain multiple modes of action.
• Rotate fungicide modes of action if you make more than one application in a season.
• Follow label rates and application timing.
• Apply fungicides based on scouting observations and risk for yield loss.
• Use integrated pest management practices to maintain plant health.

2 effective fungicide options
DuPont Aproach Prima fungicide has two modes of action and preventive, curative and eradication activity to control all phases of the pathogen life cycle. On-farm strip trials in 2015 and 2016 showed, on average, an $11-per-acre return on investment when Aproach Prima was applied to soybeans and a $14-per-acre return on investment in corn.

In heavy soybean white mold areas, DuPont Aproach fungicide delivers effective control. It is the only disease control technology that protects plants internally and externally, with better distribution throughout the canopy and outstanding rainfastness for a visibly better crop.

Learn more about specific disease signs and control strategies at the DuPont Foliar Health Center. For crop protection product information at your fingertips, download the app, DuPont Evalio FieldPartner US, from the Apple App Store or the Google Play Store. If you have questions, contact Meisgeier at [email protected].

Source: DuPont Crop Protection


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