Skip to main content
  • MSU Extension
  • Michigan State University Ag Bio Research
  • Project Greeen

Eastern Spruce Gall Adelgid Scouting for 2014 at Pigeon (Report issued 7/28/2014 18:30)

Use these predictions as guidelines to help time your scouting efforts.
Missing degree day data for dates: 2014-07-09
Key event Timing
First adults active; egg laying begins. 4/20 through 5/10
Egg laying. 5/10 through 5/27
Eggs hatching; nymphs feeding. 5/27 through 5/31
Galls forming. Started on 5/31
Current stage: Galls visible.

Degree day total: 1268 on 7/28/2014

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
Products registered for use in Christmas trees