New Pest Response Guidelines - aphis - US Department of Agriculture

Identification
Dendrolimus sibiricus
Adults
The SSM is a relatively large moth with a wingspan measuring between 40 and
60mm in males and 60 to 80mm in females. Females are larger than males with
a body length averaging 39mm compared to 31mm in males (EPPO, 2005;
Mikkola and Stahls, 2008). The hind wing has no markings and is normally
light brown to reddish-brown. The front wings have 3 distinctive black
transverse lines and a distinctive white spot within or along the antemedial line
(from the thorax outward these lines are named antemedial, postmedial and
subterminal) (Figure 3-9 on page 3-10). There exists extensive color variation
in the adults, associated with geographic origin. The most common are the
dark grayish form found mostly on the western part of Russia. The unicolorous
brown forms are generally found in Eastern Siberian and the Russian Far East;
the melanic forms are mainly found in the Buryatiya and the Altai region in
Russia (Mikkola and Stahls, 2008).
Figure 3-9 Adult Siberian silk moth, Dendrolimus sibiricus, photographs
showing dorsal view of female (top) and male (bottom)(Pest and
Diseases Image Library, Bugwood.org).
3-10 Dendrolimus Pine Moths 12/2012-01