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 4/16/2014 0:13)

Use these predictions as guidelines to help time your scouting efforts.
Key event Timing
First adults active; egg laying begins. Expected to start in 3 DD (Base 50°F)
Egg laying. Expected to start in 78 DD (Base 50°F)
Eggs hatching; nymphs feeding. Expected to start in 228 DD (Base 50°F)
Galls forming. Expected to start in 288 DD (Base 50°F)
Current stage: Adults will be active soon.

Degree day total: 22 on 4/15/2014Degree day forecast: 22 on 4/16/2014

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