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Yield response of corn products to fungicide application at tasseling development stage (VT) was measured in replicated small plot research trials in Iowa across 2 years and 2 locations. Pictures were taken to show how some products resist disease development in the absence of fungicide application.
The objective of the experiment was to demonstrate the genetic propensity of certain corn products to resist disease pressure.
SITE NOTES: The trial consisted of 4-row 45-foot-long plots with 3 replications in two adjacent blocks (fungicide treatment and untreated) at each site-year. The center 2 rows were harvested for yield. Fungicide was applied at full labeled rate using a high clearance sprayer at VT.
Table 1. Positive Yield Response by Year and Site. NA – No data available. *No positive yield response. **DEKALB® Disease Shield™ Product. 1 – Northern Corn Leaf Blight; 2 – Gray Leaf Spot; 3 – Anthracnose Stalk Rot; 4 – Southern Rust
Figure 1. This photo indicates average disease pressure without fungicide at Victor, IA in 2017. Gray Leaf Spot and Southern Rust are the predominant diseases in this picture.
Figure 2. DKC63-60RIB Brand Blend with fungicide (left) and without fungicide (right) at Victor, IA in 2017.
Figure 3. DKC 64-34RIB Brand Blend with fungicide (left) and without fungicide (right) at Victor, IA in 2017.
LEGAL STATEMENT For additional agronomic information, please contact your local brand representative. Developed in partnership with Technology, Development & Agronomy by Monsanto. The information discussed in this report is from a two-year, two-location demonstration. This informational piece is designed to report the results of this demonstration and is not intended to infer any confirmed trends. Please use this information accordingly. B.t. products may not yet be registered in all states. Check with your Monsanto representative for the registration status in your state. IMPORTANT IRM INFORMATION: RIB Complete® corn blend products do not require the planting of a structured refuge except in the Cotton-Growing Area where corn earworm is a significant pest. SmartStax® RIB Complete® corn blend is not allowed to be sold for planting in the Cotton-Growing Area. See the IRM/Grower Guide for additional information. Always read and follow IRM, where applicable, grain marketing and all other stewardship practices and pesticide label directions. Individual results may vary, and performance may vary from location to location and from year to year. This result may not be an indicator of results you may obtain as local growing, soil and weather conditions may vary. Growers should evaluate data from multiple locations and years whenever possible. Disease Shield™, RIB Complete® and SmartStax® are trademarks of Monsanto Technology LLC. All other trademarks are the property of their respective owners. ©2018 Monsanto Company All Rights Reserved 180108141428 011518JMG