| 【Objective】The trial was conclucted to understand the damage habits of the Polychrosis
cunninhamiacola and identify the main morphological characteristics of male and female pupae and adults.【Method】The
tops with larvae were collected from the Cunninghamia lanceolate forests and observed in insectarium combined with the
observation outdoors. The behavior habits and morphological characters of larvae, male and female pupae and adults of P.
cunninhamiacola were observed.【Result】The larvae of P. cunninhamiacola had shoot-transferring behavior habits and damaged the tops of C. lanceolata. When the larvae reach maturity, they pupated in the tip of a branch. Most pupae completed
eclosion in the wee hours or in the morning, and the egg were scattered on the back of blades. The pupa was obtect and the new
pupa was beige. The male pupae had a longitudinal genital cleft on the segmental venter of the ninth abdominal segment, with a
hemispherical protuberance on each side. The distance between anal cleft and genital cleft was 80-170 μm. The genital cleft
of female pupa was on the eighth abdominal segment and there was no hemispherical protuberance on either side of the cleft.
The distance between anal cleft and genital cleft was 270-360 μm. The hapis at the tail of the male adult was obvious with
forked or forceps shaped and densely scaly. The female adult had a kidney-shaped, orange ovipositor on its tail.【Conclusion】
The damage behaviors of P. cunninhamiacola（such as shoot-transferring）were understood, male and female pupae were
identified by the the characteristics such as pupa’s abdominal segment and protuberance, and male and female adults were
identified by adult’s hapis, ovipositor and other characteristics, which provided a theoretical basis for the monitoring and
control of P. cunninhamiacola. |
