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Digital Guide to Moth Identification

990278.0019278Dendrolimus sibiricus – Siberian Silk Moth – Tschetverikov, 1908
Distribution Data for Dendrolimus sibiricus
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Distribution: Russia, Kazakhstan, China, Korea, and Mongolia (4).

Seasonality
and Size:
Generation time varies from one generation every 2-4 years, although one generation per year can occur in southern parts of its range (5). Wingspan ranges 60-80mm in females and 40-60mm in males (4).

Larva and
Host Plants:
Larvae recorded on Larix sibirica (Siberian Larch) (1).

Description/
Field Marks:
Color ranges light yellowish-brown or light grey, to dark brown or almost black (4). Forewing with two characteristic dark stripes and a white spot in the center of the forewing's basal half (4).

Similar Species: Adults may be confused with other Dendrolimus. D. sibiricus can be distinguished from non-target Dendrolimus and Gloveria by the presence of two projections on the valve, as opposed to a single projection. The length of these projections can be used to distinguish D. superans from D. sibiricus and D. pini (3).

In D. pini the smaller (lower or sternal) projection is less than or equal to the length of the longer projection. In the D. sibiricus and D. superans complex, the lower projection is at least half the length of the upper (dorsal) projection.

"The postmedial line [of the forewing] is much incurved near the costa in D. sibiricus and only slightly incurved in D. superans"(4).

The transverse bands found in the larvae distinguish Dendrolimus from Gloveria and other SW United States Lasiocampidae of similar size (2). These bands are red in Phyllodesma, and only one black band is present in Tolype.

References
  • (1) Natural History Museum: HOSTS- A Database of the World's Lepidopteran Hostplants website
  • (2) Passoa, S. 2007. Quarantine significant Lepidoptera of concern to the Southern United States. Presentation available here
  • (3) Passoa, S. 2009. Screening key for CAPS target Lepidoptera in the Eastern and Midwestern United States (males). [pdf]
  • (4) EPPO data sheet on quarantine pests: Dendrolimus sibiricus and Dendrolimus superans[pdf]
  • (5) Molet, T. 2012. CPHST Pest Datasheet for Dendrolimus sibiricus*. USDA-APHIS-PPQCPHST. [pdf]
  • (6) Species Page at BOLD Barcoding Project - website.
Photographs are needed for this species.

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