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  • MSU Extension
  • Michigan State University Ag Bio Research
  • Project Greeen

Eastern Spruce Gall Adelgid Scouting for 2015 at Pigeon (Report issued 9/3/2015 8:49)

Use these predictions as guidelines to help time your scouting efforts.
Key event Timing
First adults active; egg laying begins. 4/14 through 5/5
Egg laying. 5/5 through 5/23
Eggs hatching; nymphs feeding. 5/23 through 5/26
Galls forming. Started on 5/26
Current stage: Galls visible.

Degree day total: 1897 on 9/2/2015
Degree day forecast: 2046 on 9/9/2015

Treatment Guidelines for Eastern Spruce Gall Adelgid

Soil Drench Treatment Window: Closed
NURSERY AND LANDSCAPE ONLY: If galls were a problem the previous year, apply a basal soil drench of imidacloprid or clothianidin in early spring (between 40 and 80 DD Base 50F).

Spring Foliar Treatment Window: Closed
If galls were a problem the previous year, apply an insecticide as foliar spray when the DD Base 50 F total is between 25 and 120.
Christmas tree insecticide recommendations and products registered for use