What is the GDD in your area?
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EmailEnviro-weather is a tool that all nurseries and landscapers should be using. Here is a sneek preview of what it has to offer.
Enviro-weather can answer those specific questions you might have, like “What is the GDD as of today?” This website has weather stations all over the state monitoring elements that help all ag commodity groups in making decisions for insect and disease management. Some of the most valuable tools to me are monitoring GDD, insect development, utilizing the models for specific insects, and the historical data.
Take a look at some of the fundamentals I have highlighted for you to get you used to what is offered through Enviro-weather.
Kalamazoo’s Enviro-weather station update for today, March 27
- No overnight freezing temperatures occurred. See the hour by hour tempertures model.
- GDD (Growing Degree Days) is 218 for Kalamazoo. What does that mean for your IPM scouting? See the insect developm ent charts.
- Gypsy moth treatment windows of oportunity is open for all compounds. See the gypsy moth treatment guidelines.
- Specific insect events noted for control measures:
|
Insect |
Event |
Time of event |
|
Cooley spruce gall adelgid |
First adult activity; egg laying begins |
March 12-19 |
|
Eggs start to hatch and nymphs start to feed |
Started March 21 and will continue for an additional 92 GDD that equates to a total of 310 | |
|
Galls start to form |
Started on 3/23 and expected to continue to 310 GDD | |
|
European pine sawfly |
Eggs hatch; first larvae appear |
March 18 |
|
Pine needle scale |
Eggs hatch; first generation of crawlers |
Expect to begin when we accumulate an additional 32 GDD that equates to 250 GDD |
|
Eastern spruce gall adelgid |
First adults active |
March 12-18 |
|
Egglaying |
March 18 and expected to continue for 32 more GDD that equates to 250 GDD | |
|
Eggs hatching and nymphs feeding |
Expect at 250 GDD which is when we accumulate and additional 32 GDD | |
|
Gall forming |
Begins at 300 to 310 GDD |
Make sure to add the Enviro-weather website to your “favorites.” It’s a handy tool and a great reference for understanding insect development.
To find information for your specific region, visit the Enviro-weather home page at www.enviroweather.msu.edu, determine the closest weather station to your farm or review averages for the region. Kalamazoo is in south central Michigan; southwest includes Lawton and Berrien Springs, plus many more.
Related MSU Extension News article: “Enviro-weather overnight temperature report”
