Fruit Pest Updates

    • August 7, 2025

      By Becky Wiepz and Dan Kielar Alert! High Spotted Wing Drosophila trap counts Station Updates UW Madison/Extension Updates Historic Growing Degree Day Comparison Date 8/6 2021 2022 2023 2024 2025 20-year avg. Base 50 1488 1378.5 1440 1498.5 1425 1443 GDD50 continues to stay 2-3 days behind the 20-year average. Recent Weather at Peninsular Ag…

    • August 1, 2025

      By Becky Wiepz and Dan Kielar Alert! High Spotted Wing Drosophila trap counts and confirmed presence in cherry fruit continue this week Station Updates UW Madison/Extension Updates Historic Growing Degree Day Comparison Date 7/31 2021 2022 2023 2024 2025 20-year avg. Base 50 1374 1262.5 1322.5 1374 1317.5 1328 GDD50 continues to stay 2-3 days…

    • July 24, 2025

      By Becky Wiepz and Dan Kielar Alert! High Spotted Wing Drosophila trap counts and confirmed presence in sweet and tart cherry fruit Station Updates UW Madison/Extension Updates Historic Growing Degree Day Comparison Date 7/23 2021 2022 2023 2024 2025 20-year avg. Base 50 1215 1110.5 1174.5 1221.5 1139 1169 GDD50 continues to stay 2-3 days…

    • July 9, 2025

      By Becky Wiepz and Dan Kielar Alert! High Spotted Wing Drosophila trap counts and confirmed presence in sweet and tart cherry fruit Station Updates UW Madison/Extension Updates Historic Growing Degree Day Comparison Date 7/8 2021 2022 2023 2024 2025 20-year avg. Base 50 954.5 812.5 923 930.5 864 878 GDD50 continues to stay 2-3 days…

    • July 1, 2025

      By Becky Wiepz and Dan Kielar Alert! High Spotted Wing Drosophila trap counts and confirmed presence in sweet cherry fruit Station Updates UW Madison/Extension Updates Historic Growing Degree Day Comparison Date 6/30 2021 2022 2023 2024 2025 20-year avg. Base 50 813 684.5 770.5 799.5 702.5 730 GDD50 continues to stay 3-5 days behind the…


    To aid in fruit management decisions, you can access the 2021-2022 Midwest Fruit Management Guide

    The 3 day PHI for Mustang Maxx on cherries in Wisconsin has been extended through December 31, 2023.

    NEWA (Network for Environment and Weather Applications) can be reached at www.newa.cornell.edu

    Click Wisconet for individual stations.