University of Illinois Extension

University of Illinois Extension

Hort Answers

Insect Damage

Spruce Needle Miner
Endothenia albolineana

2 (1 = rare 5 = annual)
3 (1 = very little damage 5 = plants killed)
There are several species of needle miners. Spruce needle miner (Endothenia albolineana) attacks most types of spruces.

Plants Affected
Bundles of brown, dead needles tied to the twig are obvious on close examination. High infestations can cause noticeably thin foliage.

Life Cycle
Eggs are laid like shingles on the spruce needles. After hatching, the larva enters the base of the needle, hollowing it out. The larvae cut the needles off after completely mining them. Dense mats of silk threads hold the dead needles on the twig. Larvae feed on one needle after another untill fall. At this time, the larvae overwinter inside a needle. They emerge in the spring and feed till they pupate

If necessary, apply an insecticide in early spring.

Related Resources
Home, Yard & Garden Pest Guide
Illinois Commercial Landscape and Turfgrass Pest Management Handbook
U of IL - Distance Diagnosis through Digital Imaging
U of IL - Plant Clinic