Abstract: Through experiment, the effective accumulated temperature and the threshold temperature for development of Chouioia cunea Yang (Hymenoptera:Eulophidae), a powerful pupa endoparasitoid of the intruded insect pest-fall webworm, Hyphantria cunea Drury (Lepidoptera:Arctiidae), are 365.12 degree-day and 6.14℃, respectively. Meanwhile, the curve diagram of functional relationship between theoretical development duration and temperature is given. These data are important in mass-rearing the wasp for biological control of the pest.

Key words: Fall webworm, Chouioia cunea Yang, Effective accumulated temperature, The threshold temperature for development, Biological control