Pest profile

Pine Needle Scale

Chionaspis pinifoliae · Hemiptera: Diaspididae[2]

White flecks lined up on pine or spruce needles are usually pine needle scale; light infestations are mostly cosmetic.[1]

Small white, elongate pine needle scales on green conifer needles
Small white, elongate pine needle scales on green conifer needles. (c) Z, some rights reserved (CC BY) — via iNaturalist, CC BY 4.0

How to identify it

  • Scales are white, oval-elongate and about 1/8 inch long on the needles.[1]
  • Unlike most armored scales, they're easy to see against green needles.[1]

Look-alikes

Look-alikeHow to tell them apart
Other scale insectsScale species differ in timing, so identify the species to know when crawlers are active.[1]

Where it lives

Hosts are pine, spruce, fir, hemlock and Douglas-fir.[1]

US map: public records from 20 states since 1990 (GBIF).

Biology and life cycle

Eggs laid in fall overwinter under the dead mother scale and hatch in mid to late May.[1]

Crawlers settle on new needles and form their shells; one generation a year in Minnesota.[1]

Damage and signs

  • Light to moderate feeding yellows needles and makes them drop; heavy, persistent infestations reduce vigor, but that's uncommon.[1]

Health risk

Scales feed only on plants; Minnesota Extension mentions no risk to people.[1]

Control

Prevention

Shake branches over white paper or use double-sided tape to spot the reddish crawlers.[1]

Pesticides

Spray insecticidal soap or horticultural oil when crawlers are active in mid to late May.[1]

Common questions

What are the white specks on my spruce needles?
Likely pine needle scale, a white elongate scale.[1]
When do crawlers hatch?
Mid to late May in Minnesota.[1]

Sources

  1. University of Minnesota Extension, “Scale insects (Yard and garden insects).” extension.umn.edu/garden-and-home/yard-and-garden/yard-and-garden-insects/scale-insects (accessed 2026-10-06)
  2. iNaturalist, “Chionaspis pinifoliae taxon page (order and family).” www.inaturalist.org/taxa/1584493 (accessed 2026-10-06)

Updated 2026-10-14. Built from sourced records. Spot an error? Tell us.