BugwoodWiki Article

Pine-tree lappet
Dendrolimus pini (Linnaeus)

Overview

Pine-tree lappet or pine moth is a European native, but is also known in the western part of Asia. It has not yet been detected in North America. The most likely method of introduction would be eggs and pupae hidden in the bark crevasses of unprocessed logs. Hosts are a wide range of conifers including fir, cedar, juniper, spruce, pine, Douglas-fir, and larch. From late-June through August, adult females lay eggs in groups of about 100. Females do not fly until after they have laid some of their eggs. The pinhead-sized (1/16 inch) eggs are blue-green when first deposited, later turning gray. Eggs hatch in about 14 days. Caterpillars first feed on egg shells, then on needles. First instar larvae can be wind dispersed as well as crawl significant distances to reach uninfested trees. One larva may consume up to 1,000 needles. When no needles are present, the bark of young shoots is also eaten. Mature larvae are 2-3 inches long with soft, gray to brownish hairs. Identifying features of the caterpillar include thick bands of steel blue and black hairs on the thorax and a black mark flanked by irregular white lines on the abdominal segments. After the first frost, caterpillars move to the litter on the forest floor to overwinter. The following spring, they return to the canopy to resume feeding. In June, yellow-brown to black cocoons marked with steel blue hairs start being formed in bark crevices and on needles and branches. Adults emerge in roughly 4 weeks. Identifying features of the 2 to 3 1/2 inch moth include gray-brown to brown forewings with a reddish brown lateral band and an irregular dark-brown to black stripe along the edges. Hind wings are red brown to gray brown. Males are usually darker than females.

Resources

Selected Images


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1220020

Pine-tree lappet
Dendrolimus pini
Larva(e)
Hannes Lemme
1260053
1260053

Pine-tree lappet
Dendrolimus pini
Adult(s)
Hannes Lemme
3943019
3943019

Pine-tree lappet
Dendrolimus pini
Larva(e)
William M. Ciesla
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1258049

Pine-tree lappet
Dendrolimus pini
Larva(e)
Stanislaw Kinelski
1292010
1292010

Pine-tree lappet
Dendrolimus pini
Adult(s)
Robert Dzwonkowski
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1260017

Pine-tree lappet
Dendrolimus pini
Adult(s)
Hannes Lemme
1220015
1220015

Pine-tree lappet
Dendrolimus pini
Cocoon(s)
Hannes Lemme
1260052
1260052

Pine-tree lappet
Dendrolimus pini
Adult(s)
Hannes Lemme
1220016
1220016

Pine-tree lappet
Dendrolimus pini
Cocoon(s)
Hannes Lemme
1220023
1220023

Pine-tree lappet
Dendrolimus pini
Egg(s)
Hannes Lemme
1220024
1220024

Pine-tree lappet
Dendrolimus pini
Egg(s)
Hannes Lemme
1258019
1258019

Pine-tree lappet
Dendrolimus pini
Adult(s)
Stanislaw Kinelski
1258047
1258047

Pine-tree lappet
Dendrolimus pini
Cocoon(s)
Stanislaw Kinelski
1258048
1258048

Pine-tree lappet
Dendrolimus pini
Egg(s)
Stanislaw Kinelski
1260018
1260018

Pine-tree lappet
Dendrolimus pini
Adult(s)
Hannes Lemme

Taxonomic Rank

Kingdom: Animalia
Phylum: Arthropoda
Subphylum: Atelocerata
Class: Hexapoda (including Insecta)
Infraclass: Neoptera
Subclass: Pterygota
Order: Lepidoptera
Superfamily: Lasiocampoidea
Family: Lasiocampidae
Subfamily: Pinarinae
Tribe: Pinarini
Genus: Dendrolimus

Other System Links

NPDN Pest: ITAUAOA

Categories

Category: Foliage Feeding Insects