Abstract: Telenomus dendrolimusi Chu, Trichogramma dendrolimi Matsumura and Trichogramma dendrolimi Ashmead are major egg parasitoids of Dendrolimus punctatus Walker in Zhejiang province.T.dendrolimusi is a better control agent in regulating the population of D.punctatus.Parasitizm by T.dendrolimi can be increased by artificial releasing of T.dendrolimi.Control of D.punctatus by using egg parasitoids should bring the role of egg parasitoids into full play, especially the role of T.dendrolimusi.Mixed stands of Masson pine (Pinus massoniana Lamb.) and Slash pine (Pinus elliottii Eng.) or Loblolly pine (Pinus taeda L.) are better than pure pine stands for the function of egg parasitoids is enhanced in natural stands.