GDD 200-300

Use Growing Degree Days as part of an IPM scouting program.

 

Between 200 and 300 Growing Degree Days(GDDB50), we would expect to see the following pest activity:

(Click on underlined pests for links to fact sheets)

 

Spruce Spider Mite  (Around 200 GDD)

Gypsy Moth Egg Hatch (around 203 GDD)

Birch Leafminer Adult Emergence (around 208 GDD)

Honeylocust Spider Mite Egg Hatch (around 214 GDD)

Elm Leafminer Adult Emergence (around 215 GDD)

Alder Leafminer Adult Emergence (around 225 GDD)

Honeylocust Plant Bug Egg Hatch (around 225 GDD)

Hawthorn Lace Bug Adult Emergence (around 245 GDD)

Imported Willow Leaf Beetle Adult Emergence (around 258 GDD)

Pine Needle Scale First Generation Egg Hatch (around 286 GDD)

Eastern Spruce Gall Adelgid Egg Hatch (around 292 GDD)

 

Any of the fact sheets above can be found in Spanish at the Penn State Entomology Website

All of the expected activities are based on observations made by Dr. Daniel Herms of OARDC

 

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