- Demonstrate that Proline® 480 SC Foliar Fungicide applied when corn is silking helps suppress the development of the disease, Fusarium graminearum (Gibberella zeae), which can produce the mycotoxin, deoxynivalenol (DON or vomitoxin).
- Demonstrate that in the presence of Fusarium graminearum (Gibberella zeae), potential yield can be maintained or have a positive advantage when corn plants are treated with Proline® 480 SC Foliar Fungicide compared to non-treated corn plants.
Research Site Details
- Mapping Options
- Map in Climate FieldView™ at planting.
- Have summer assistant walk the field outline with a Climate backpack.
Proline® 480 SC Foliar Fungicide Application
- Map spraying area with Climate FieldView™.
- If possible, leave at least two untreated passes in the middle of the field (inconsecutive about 1/3 to 2/3 of the field).
- Spray passes should align with combine width.
- If plot cooperator is spraying to control western bean cutworm (WBC), then the section of the field with the trial should also include the insecticide application.
- Use 420 ml/ha (170 ml/acre) of Proline® 480 SC Foliar Fungicide in a minimum water volume of 175 ml/ha (19 gal/acre). A jug of Proline® 480 SC Foliar Fungicide 5.1 L covers 12.14 hectares (30 acres).
- No strict timing for application; however, it should be applied between full silk and browning of silk. Can be sprayed when plot cooperators spray for WBC.
- Use drone flights to help capture interesting observations.
- Optional – Capture fungal disease severity (FSEV) rating at R3 to R5 growth stages (Figure 1).
- Capture staygreen (STGRN) (Figure 2) and Gibberella ear rot severity (ERSR) (Figure 3) ratings at R5 growth stage.
- At harvest, capture ratings for root lodging (RTLP), stalk lodging (STLP), intactness (INT), average yield (YLD), percent moisture content (MST), and test weight (TWT).
- Collect grain samples at harvest for DON and Zearalenone mycotoxin laboratory analysis (MDIC).
- Ratings and percentages are assessed and recorded by walking the field and reviewing representative areas for each treatment.
Figure 1. Foliar disease rating comparison scale for capturing fungal disease severity (FSEV) rating.
Figure 2. Staygreen rating comparison scale.
Figure 3. Gibberella ear rot comparison rating scale.
|Table 1. Agronomic Information for Each Location
|St. Agatha, Ontario
|St. Agatha, Ontario
|Gads Hill, Ontario
||Silt Clay Loam
Understanding the Results
- In these field scale trials, Proline® 480 SC Foliar Fungicide showed positive results for staygreen, average yield increase, reduction in Gibberella ear rot, and DON suppression (Figures 4 thru 9).
- There was minimal difference in moisture content between the treated and untreated samples (+0.24% greater for Proline® 480 SC Foliar Funigicide treated corn).
- Gibberella ear rot infections in 2019 were very low to none which resulted in very low DON levels. Levels of both were higher in 2020.
- Compared to untreated plots, the average estimated yield difference at 18 Eastern Canada locations (2019 and 2020) was +2.3 bu/acre when Proline® 480 SC Foliar Fungicide was used and Gibberella ear rot pressure was absent.
- Compared to untreated plots, the average DON reduction in 18 Eastern Canada locations (2019 and 2020) was 60% when Proline® 480 SC Foliar Fungicide was used.
- Compared to the untreated check, the average estimated yield difference was +4.8 bu/acre in 5 Eastern Canada locations (2019 and 2020) when Proline® 480 SC Foliar Fungicide was used and Gibberella ear rot pressure was present.
- When Gibberella ear rot pressure was present, the average estimated development of DON in 6 Eastern Canada locations (2019 and 2020) was 1.04 ppm or 55.6% less when the corn was treated with Proline® 480 SC Foliar Fungicide compared to the untreated check.
Figure 4. Average percent of DON development based on Gibberella ear rot pressure in Eastern Canada in 2019 and 2020.
Figure 5. Proline® 480 SC Foliar Fungicide application areas (left) and estimated disease occurrence (right) on August 22, 2020, Ontario, Canada.
Figure 6. Proline® 480 SC Foliar Fungicide application areas (left) and estimated disease occurrence (right) on September 3, 2020, Ontario, Canada.
Figure 7. Proline® 480 SC Foliar Fungicide application areas (left) and estimated disease occurrence (right) on September 13, 2020, Ontario, Canada.
Figure 8. Climate Fieldview™ imagery showing the response comparisons of Proline® 480 SC Foliar Fungicide after an August 3, 2019 application. Ontario, Canada. .
Figure 9. Average yield results from the same Ontario, Canada field in 2019 between Proline® 480 SC Foliar Fungicide and untreated check. The fungicide advantage was an average of 8 bu/acre.
- In these trials, applying Proline® 480 SC foliar fungicide at silking provided an average increase in yield of 2.3 bu/acre compared to untreated corn.
- Proline® 480 SC Foliar Fungicide demonstrated an average yield increase of 4.8 bu/acre and 55.6% decrease in DON development in these trials when Gibberella ear rot pressure was present.
The information discussed in this report is from a multiple site, replicated and non-replicated 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.
ALWAYS READ AND FOLLOW PESTICIDE LABEL DIRECTIONS. Performance may vary from location to location and from year to year, as local growing, soil and weather conditions may vary. Growers should evaluate data from multiple locations and years whenever possible and should consider the impacts of these conditions on the grower’s fields.
Tank mixtures: The applicable labeling for each product must be in the possession of the user at the time of application. Follow applicable use instructions, including application rates, precautions and restrictions of each product used in the tank mixture. Bayer has not tested all tank mix product formulations for compatibility or performance other than specifically listed by brand name. Always predetermine the compatibility of tank mixtures by mixing small proportional quantities in advance. DEKALB® and Proline® are registered trademarks of Bayer Group. Used under license. All other trademarks are the property of their respective owners. Bayer CropScience Inc. is a member of CropLife Canada. ©2021 Bayer Group. All rights reserved. 6005_R13