Growing Degree Days (GDD) in Ohio

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Each Tuesday, members of the Extension Nursery Landscape and Turf (ENLT) have a virtual meeting to discuss what they are seeing in their own area and talk about those "stumpers" that they have come across in the horticulture world and get feed back from others in the group. 


The Growing Degree Day (GDD) range from callers was 124 (Toledo) to 256 (Cincinnati). Other accumulations included: 130 (Burton); 182 (Wooster); 206 (Springfield); and 221 (Columbus).


The GDD calendar is an awesome tool to help with horticultural happenings. If you haven't been using information from the GDD website, don't wait another moment. Check it out today:


Pest highlights in the range include: Larval Feeding Begins of Larch Casebearer (128); First Adult Emergence of Exotic Ambrosia Beetle (136); Egg Hatch of European Sawfly (144); Adult Emergence of Inkberry Leafminer (150); First Seedling Emergence of Smooth Crabgrass (155); Egg Hatch of Spruce Spider Mite (162); Egg Hatch of Boxwood Psyllid (179); Egg Hatch of Gypsy Moth (192); Egg Hatch of Azalea Lace Bug (206); First Egg Hatch of Viburnum Leaf Beetle (210); First Seedling Emergence of Large Crabgrass (211); Adult Emergence of Birch Leafminer (215); Adult Emergence of Elm Leafminer (219); Adult Emergence of Alder Leafminer (224); Egg Hatch of Honeylocust Spider Mite (227); Egg Hatch of Honeylocust Plant Bug (230); Adult Emergence of Hawthorn Lace Bug (253); and Adult Emergence of Hawthorn Leafminer (260).


First Instar Gypsy Moth Caterpillars
Photo Credit: Amy Stone, OSU Extension, Lucas County - First Instar Gypsy Moth Caterpillars


What is your GDD?