Protecting Yields with Early Tar Spot Detection and Timely Fungicide Application

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August 10, 2024

DATE | July 2024

LOCATION | Bourbon, IN

CROP | Corn

THREAT | Disease

MISSION | 1 2 3 4 5 6

When tar spot is detected mid-season, immediate action is essential to prevent severe yield losses.

PROBLEM

Tar spot pressure was identified in 41% of the field in mid-July following Mission 5.
Yield loss from tar spot can be severe, with up to 50 bushels per acre observed in some cases.
The disease is difficult to spot, requiring detailed scouting, which was successfully aided by the georeferencing feature in the Taranis mobile app.

RECOMMENDATION

Crop advisor was able to confirm what appeared in the insight
Apply Veltyma or Trivapro (upsell from the retailer) at $26/ac + $14 for application +adding some adjuvants & insecticides ~$5 = $45/acre:
Retailer 30% margin is equal to $13.5 additional sales per acre
There were 7,190 affected acres X $13.5 = $86,280
Monitor disease spread and consider third fungicide application
Tagged leaf-level tar spot insight in Taranis web app (manually circled black spots)

OPPORTUNITY

Retailer Opportunity
Expand fungicide sales by demonstrating the value of VT/R1–R3 applications — in this case, protecting up to 24 bushels/acre — and engage the 60% of growers who currently don’t apply.

Grower Opportunity
Safeguard yields and profitability with timely fungicide use — up to 24 bushels ($96/acre) protected — while gaining peace of mind through monitoring, hybrid evaluation, and stronger advisor support for next season.

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