Pest profile

Pine Needle Sheathminer

Zelleria haimbachi · Lepidoptera: Yponomeutidae[2]

Pine needle sheathminer larvae mine inside pine needles and at their bases, making needles droop or stick out at odd angles, especially on smaller trees.[1]

Pine needle sheathminer moth, a slender silvery-gold moth, resting on a screen
Pine needle sheathminer moth, a slender silvery-gold moth, resting on a screen. (c) Louis Imbeau, some rights reserved (CC BY) — via iNaturalist, CC BY 4.0

How to identify it

  • Adults are silvery moths about 1/2 inch across.[1]
  • Young larvae are bright orange with a black head; older larvae are tan and 1/2 inch long.[1]
  • Damaged needles droop or stick out from the stem at a sharp angle, and needles may be bound together into tubes.[1]

Where it lives

The PNW Insect Management Handbook covers it on two- and three-needle pines and western white pine in Pacific Northwest landscapes.[1]

US map: public records from 16 states since 1990 (GBIF).

Biology and life cycle

It overwinters as a young larva inside the needle sheath, resumes feeding in spring and pupates on the shoot tip.[1]

Adults lay eggs on needles from early to midsummer, and there's one generation a year.[1]

It attacks species and hybrids of two- and three-needle pines as well as western white pine, and seems to prefer smaller trees.[1]

Damage and signs

  • Young larvae mine inside needles and older ones feed at the needle base inside the sheath, leaving needles that droop or stand out at sharp angles.[1]

Health risk

It feeds on plants; the PNW Insect Management Handbook mentions no risk to people.[1]

Control

Prevention

Look under trees for needles bound into tubes, and on branches for needles bound together instead of fanned out.[1]

Traps and physical control

On smaller trees, prune out and destroy heavily infested branch tips or needle clusters in early spring.[1]

Common questions

Why are the needles on my young pine drooping and stuck together?
Pine needle sheathminer larvae feeding inside needle sheaths cause drooping needles and bound clusters.[1]
When should infested pine tips be pruned?
In early spring; on smaller trees, prune out and destroy heavily infested tips or needle clusters.[1]

Sources

  1. Pacific Northwest Pest Management Handbooks (OSU, WSU, University of Idaho), “Pine (Pinus): Pine needle sheathminer (Insect Management Handbook).” pnwhandbooks.org/insect/hort/landscape/hosts-pests-landscape-plants/pine-pinus-pine-needle-sheathminer (accessed 2026-10-06)
  2. iNaturalist, “Zelleria haimbachi taxon page (order and family).” www.inaturalist.org/taxa/233970 (accessed 2026-10-06)

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