Seed Seller's At-A-Glance Guide
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NATUREAL CONTROL OF CORN EARWORM |
Product description: Hearken® (hur’-ken) biological insecticide contains a virus that targets Heliothine species pests, such as corn earworm, with a new mode of action.
Product form: Liquid
Crops: Corn, soybeans, alfalfa, sorghum, popcorn
How applied: Foliar spray
Benefits
- New way to control pests for resistance management
- Does not impact beneficial or non-target species
- Fits within Integrated Pest Management systems
- Fits within organic systems – OMRI listed
Uses
- In seed corn production — controls one of the top pests (corn earworm)
- Can be used on all types of corn (field, silage, seed, pop) except sweetcorn
- Good in rotation or as a supplement to conventional chemistries
- Tank-mix compatible with most commonly used insecticides, fungicides or liquid fertilizers
- Controls corn earworm in soybeans, a significant issue in southern regions. 2 According to Crop Protection Network (CPN):
- Corn earworm was the #2 invertebrate pest in soybeans in 2022, causing a 13.7M bu/A yield loss.
- Soybean producers spent $64.2M on corn earworm control measures in 2022; a combination of insecticide use and replanting.
The Hearken® “So what?” for a seed company
In seed corn production — A new, natural option for control of corn earworm
For your corn and soybean customers — Hearken can be a good fit for those who:
- Are dealing with Heliothine pests, particularly corn earworm, which can cause losses in corn and soybeans
- Corn earworm in soybeans is a particular problem in southern areas and is more common in later-planting3-4
- Want to reduce chemical residues on their crop
- Use organic farming practices
- Desire a product compatible with other insecticides, fungicides or fertilizers
- Want to reduce impact on beneficial insects and non-target organisms
- Practice resistance management in their pest control program
- Want a product with long shelf-life — 2 years under proper storage
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SUPPLIES NITROGEN FROM THE AIR THROUGHOUT THE GROWING SEASON |
Product description: Utrisha® N (you-trish’-uh) contains a natural, nitrogen fixing bacterium that gets into leaf cells, enabling them to capture N from the air.
Product form: Wettable powder
Crops: Corn, soybeans, wheat and other crops
How applied: Foliar spray at rate of 5 oz/A
- For corn: apply V4-V8
- For soybeans: can be applied at either V4-V8, or R1-R3 with similar performance
Benefits
- Enhances nitrogen use efficiency (NUE) to reduce dependence on nitrogen uptake from soils.
- Provides a constant supply of nitrogen to plants to improve crop health and allows plants to better reach their yield potential.
- Converts N from the air into ammonium.
- Increases yield:
- Corn — 6.9 bu/A advantage and a 73% win rate5
- Soybeans — 3.1 bu/A advantage and a 65% win rate6
- Wide application window.
Uses
- Apply to standard corn sidedressing fertilization timing as closely as possible.
- Apply with sufficient plant biomass, when the crop presents good soil coverage.
- Apply in healthy crops unaffected by poor nutrition or other biotic/abiotic stresses.
- Excellent complement to a traditional nutrient management program.
- Wide application window.
The Utrisha® N “So what?” for a seed company
In corn and soybeans — A new idea to talk about with customers interested in dialing in their fertility program.
In soybeans — A fertility boost for highly productive fields.
- Provided the greatest yield increase in high (60-80 bu/A) to very high (>80 bu/A) yielding fields where N may be limiting.
In corn — A precision tool for specific fields.
- Provided the greatest yield increase in low- to moderateyielding fields (120-220 bu/A), where N may be limiting, yet the crop is not significantly stressed.
- Showed less yield increase in very low-yielding fields (<120 bu/A), as stress factors become the primary limiting factor for yield.
- Produced some yield increase (3.5 bu/A7) in high-yielding fields (220-260 bu/A), demonstrating positive potential returns even in these conditions.
- NOTE: No significant yield increase has been seen in very high-yielding fields (>280 bu/A) as nutrient availability is generally sufficient.4
For more information
Check out the product links above or talk to your Corteva crop protection representative.
1 David Fiocco and Vasanth Ganesan, “Global Farmer Insights 2024 Survey,” McKinsey & Company, October 2024, https://www.mckinsey.com/industries/agriculture/our-insights/global-farmer-insights-2024#/.
2 Adam Sisson et al., “Soybean invertebrate Loss Estimates from the United States – 2022,” Crop Protection Network, December 17, 2023, https://cropprotectionnetwork.org/publications/soybeaninvertebrate-loss-estimates-from-the-united-states-2022?form=MG0AV3.
3 Stephanie Swenson, Deirdre Prischmann-Voldseth and Fred Musser, “Corn Earworms (Lepidoptera: Noctuidae) as Pests of Soybean,” Journal of Integrated Pest Management, https://academic.oup.com/ jipm/article/4/2/D1/835684?form=MG0AV3.
4 Reisig, Dominic, “Corn Earworms are Early in Soybeans, Populations are High, and Moths are Flying,” North Carolina State Extension, July 9, 2024, https://soybeans.ces.ncsu.edu/2024/07/corn-earwormsare-early-in-soybeans-populations-are-high-and-moths-are-flying/?form=MG0AV3.
5 Data from 2021-2023 across 406 trials showed Utrisha® N provided a 6.9 bu/A advantage among trials with positive increase and a 73% win rate by yield advantage (compared to untreated)
6 Data from 2021-2023 across 306 trials showed Utrisha N provided a 3.1 bu/A advantage among trials with positive increase and a 65% win rate by yield advantage (compared to untreated)
7 Data from 2021-2022 across 360 observations showed Utrisha N provided a 3.5 bu/A advantage among trials. Product performance is variable and depends on a variety of factors including but not limited to weather conditions, soil factors and manner of use or application. Individual results may vary.
™ ® Trademarks of Corteva Agriscience and its affiliated companies. Hearken® and Utrisha ® N are not registered for sale or use in all states. Contact your state pesticide regulatory agency to determine if a product is registered for sale or use in your state. This reference guide is not intended as a substitute for the product label for the product(s) referenced herein. Product labels for the above product(s) contain important precautions, directions for use, and product warranty and liability limitations, which must be read before using the product(s). Applicators must be in possession of the product label(s) at the time of application. Always read and follow all label direction and precautions for use when using any pesticide alone or in tank-mix combinations. © 2025 Corteva. 025753 LC (03/25)
