GDD Base 50 Maps

Below are links to maps that indicate the average calendar dates when regions surrounding the Great Lakes reach a particular accumulation of degree days (base 50 degrees F) with measurement beginning March 1. Read more about using degree days for pest management.

The MSU IPM Program maintains this site as an access point to pest management information at MSU. The IPM Program is administered within the Department of Entomology, fueled by research from the AgBioResearch, delivered to citizens through MSU Extension, and proud to be a part of Project GREEEN.