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  • Michigan State University Ag Bio Research
  • Project Greeen

Cooley Spruce Adelgid Scouting for 2014 at Pigeon (Report issued 10/2/2014 10:26)

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 5/12
Eggs start to hatch; nymphs start to feed. 5/18 through 5/31
Galls start to form. 5/24 through 5/31
Current stage: Galls visible.

Degree day total: 2130 on 10/1/2014Degree day forecast: 2142 on 10/2/2014

Treatment Guidelines for Cooley Spruce 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