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Thread: Thin Crowns on Maple this fall

  1. #1
    Join Date
    May 2009
    UVM Proctor Maple Research Center, Underhill Ctr, VT

    Default Thin Crowns on Maple this fall

    We've fielded several questions about this from folks in upstate NY and Vermont. There is an interesting segment on thin maple crowns in Vermont this fall. https://fpr.vermont.gov/sites/fpr/fi...servations.pdf

    What’s Causing Thin Crowns? Foliage Feeders, Fungi, Fruiting, and other Factors

    As mentioned in our August update, we have been observing scattered areas of thin-crowned hardwoods, including some patches with generally brown foliage. Ground checks confirmed that a variety of factors is responsible. In many areas throughout the state, Maple Leaf Cutter is the culprit. These insects have now returned to the forest floor, a “fall migration at your feet” described (including video) in Bryan Pfeiffer’s recent blog. However, in some of the stands there is no sign of maple leaf cutter. We do see a heavy seed crop on sugar maple, which has now turned brown. Some trees with heavy seed had unusually small leaves in the upper crown, and some of these have dropped. In addition, some foliage that was infected by anthracnose in the spring has shriveled and/or fallen prematurely.
    Dr. Tim Perkins
    UVM Proctor Maple Research Ctr

  2. #2
    Join Date
    Mar 2009
    Ashtabula County, Ohio


    For the past few years most of my sugars (NE Ohio) go straight to brown, curl up, then fall. No colorful orange foliage.
    1000 taps on vacuum back down to 105 buckets
    2x7 A&A Raised Flue
    CDL 12" vacuum filter
    2019 Kawasaki Mule Pro MX Sap Hauler
    Past evaporators: Phaneuf 2x6, A&A 2.5x10, Smoky Lake 2x8 (oil then wood fired)
    Syrup made 2010:36 gal 2011:126 gal 2012:81 gal 2013:248 gal 2014: 329.5 gal 2015:305 gal 2016:316 gal 2017:258 gal 2018:147 gal 2019:91 gal 2020: 30 gal
    Tapping the same trees my great, great and great grandfathers tapped.

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