Tarspotter 1.25

University of Wisconsin Nutrient and Pest Management Program ❘ Freeware ❘
iOS

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Tarspotter: UW’s science-driven tar spot forecast tool for corn growers

Minh Ong

06/18/2026

Tarspotter is a University of Wisconsin forecasting app and web tool that uses weather and modeling to map tar spot risk in corn, providing location-specific risk levels, actionable spray recommendations, and alerts to help growers time fungicide applications more effectively.

The Tarspotter platform is designed to support fungicide management decisions for tar spot disease in corn. The recommended intervention window aligns with the V10 to R3 growth stages.

Tar spot arises from fungal spores that infect corn, leading to disease development. University research indicates that the appearance of Tar spot can be forecast using several weather-related variables. Accordingly, models have been developed to forecast the field-level risk of tar spot infection.

Farmers can input site-specific details about their corn fields into the app, which then integrates these inputs with the research-based models to inform the timing for tar spot treatment.

Tarspotter uses GPS coordinates to determine whether weather conditions during corn flowering in a given field were favorable for tar spot development. The models rely on real-time weather data to project favorable dates for tar spot across most corn-growing regions. Based on these projections and crop phenology, a site-specific risk forecast is generated.

Overview

Tarspotter is a Freeware software in the category Business developed by University of Wisconsin Nutrient and Pest Management Program.

The latest version of Tarspotter is 1.25, released on 06/17/2026. It was initially added to our database on 06/17/2026.

Tarspotter runs on the following operating systems: iOS.

Users of Tarspotter gave it a rating of 4 out of 5 stars.

Minh Ong

I'm Minh, a software engineer and author with a passion for exploring and writing about the latest in software and technology. With my experience in software development and a specialization in software updates and content creation, I bring a deep understanding of the tech landscape to my reviews and articles. My focus is on providing you with comprehensive insights into general software topics and the latest industry news.

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Latest Version
1.25

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