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

Eastern Spruce Gall Adelgid Scouting for 2015 at Pigeon (Report issued 7/30/2015 8:06)

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: 1293 on 7/29/2015
Degree day forecast: 1421 on 8/5/2015


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