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 5/22/2015 13:31)

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. Started on 5/5 and expected to continue for 5 more DD (Base 50°F)
Eggs hatching; nymphs feeding. Expected to start in 5 DD (Base 50°F)
Galls forming. Expected to start in 65 DD (Base 50°F)
Current stage: Eggs are hatching; nymphs start to feed.

Degree day total: 247 on 5/22/2015

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