Abstract: Predators were major mortality factor of natural population of the pine moth, Dendrolimus punctatus Walker during its latent period. Birds, spiders, ants, true bugs and preying mantids were primary predators of the pine moth. Eggs, mature larvae, pupae and adults were mainly attacked by birds as Parus major commixtus Swinhoe; immature larvae were mainly preyed by arthropod predators such as Oxyopes linealipes L. Koch., O. seriatus L. Koch., Poyrhachis dives F. Smith, Formica rufibarbis sinae Emery., Velinus nodipes (Uhied), Lsynadus obscurus (Dallas). The mortality caused by predators was so high(95—100%) that the life cycle of the pine moth was not completed under certain circumstances.

Key words: Dendrolimus punctatus Walker, Parus major commixtus Swinhoe, Oxyopes linealipes L. Koch., Formica rufibarbis sinae Emery