Pest identification
What's eating my bird's nest spruce?
Spruce spider mite (Oligonychus ununguis)
Signs: Fine webbing between needles; needles turn yellow-bronze and drop, starting on inner branches.
Control: Spray forcefully with water to dislodge mites; apply horticultural oil or insecticidal soap in early spring or late summer when mites are active.
Cooley spruce gall adelgid (Adelges cooleyi)
Signs: Pineapple-shaped galls form at branch tips in spring, distorting new growth and causing tip dieback.
Control: Prune and destroy galls before they open in late spring; apply dormant oil in early spring before bud break to smother overwintering nymphs.
Bagworm (Thyridopteryx ephemeraeformis)
Signs: Silken bags up to 2 in long hang from branches; larvae inside strip needles, causing branch dieback.
Control: Hand-pick and destroy bags in fall and winter; spray Bt (Bacillus thuringiensis) or spinosad on young larvae in late spring.
Keep bird's nest spruce pest-free
Healthy plants resist pests best. Get the basics right:
- What eats norway spruce — the species this cultivar belongs to
- What eats bird's nest spruce — our other guide for the same plant
- What's wrong with my plant? — the diagnosis apps compared
- Common bird's nest spruce problems & fixes
- Bird's Nest Spruce watering schedule
- Bird's Nest Spruce light requirements
- Full bird's nest spruce care guide
Bird's Nest Spruce pests — FAQ
What is eating my bird's nest spruce?
Bird's Nest Spruce is most commonly attacked by spruce spider mites, which thrive in hot, dry summers and cause bronzing of needles. Cooley spruce gall adelgids and bagworms also target this dwarf form. Its dense, low mounding habit can trap moisture and harbor pests, so good airflow and monitoring are essential.
How do I get rid of spruce spider mite (oligonychus ununguis) on bird's nest spruce?
Fine webbing between needles; needles turn yellow-bronze and drop, starting on inner branches. Spray forcefully with water to dislodge mites; apply horticultural oil or insecticidal soap in early spring or late summer when mites are active.
How do I get rid of cooley spruce gall adelgid (adelges cooleyi) on bird's nest spruce?
Pineapple-shaped galls form at branch tips in spring, distorting new growth and causing tip dieback. Prune and destroy galls before they open in late spring; apply dormant oil in early spring before bud break to smother overwintering nymphs.
How do I get rid of bagworm (thyridopteryx ephemeraeformis) on bird's nest spruce?
Silken bags up to 2 in long hang from branches; larvae inside strip needles, causing branch dieback. Hand-pick and destroy bags in fall and winter; spray Bt (Bacillus thuringiensis) or spinosad on young larvae in late spring.