New Pest Response Guidelines - aphis - US Department of Agriculture

Identification
Dendrolimus superans
Adults
The SaSM is on average larger than the SSM. The wingspan in males ranges
between 70 and 75mm and from 80 to 110mm in females (De Lajonquiere,
1973; Matsumura, 1926a). Within the species, the females’ bodies are larger,
ranging from 28 to 45mm in length compared to between 24 to 37mm for
males (Hou, 1987). Adult moths vary in coloration from reddish-yellow to
reddish-brown. The characteristic markings of paired transverse lines on the
forewings are always present, but can range from well-marked to almost
nonexistent. A white spot on the center of the forewing is also variable in size
and distinction, in similarity with the SSM. Several major color
polymorphisms have been described by De Lajonquiere (1973).
Eggs
Egg of the SaSM are similar in appearances to other Dendrolimus moths,
oblong or oval shaped, dark green in coloration when mature and laid on
needles or small branches in clusters.
Larvae
Larvae of the SaSM are larger, on average, compared to the similarly
appearing SSM. The vertex (top of the head) of the larvae has a longitudinal,
yellowish-brown stripe (EPPO, 2005 paired on each side black stripe
(Matsumura, 1926a). The body is greyish-brown, with marmorated, fuscous
(reddish-brown) and yellow markings (Matsumura, 1926a and long hairs; the
2 nd and 3 rd segments crossed with blue-black stripes and silvery scales, and
each segment with a horseshoe-like or hexagonal darker marking (EPPO,
2005). Prior to entering pupation, the larvae reach lengths of 60 to 82mm
(EPPO, 2005; Rozhkov, 1970).
Pupae
The pupae are not distinguished from Dendrolimus sibiricus in the literature,
appearance is the same.
3-14 Dendrolimus Pine Moths 12/2012-01