noneEnter The parasitoids and parasitized percentage of Carposina sasakii Matsumura over - wintered larvae from different host plants, such as apricot, apple, jujuba, wild jujuba and hawthorn, were examined in the laboratory. The results showed that the parasitoid wasps and parasitized percentage differed distinctively. No parasitoid wasp was found from apricot; Chelonus (Microchelonus) zhangi emerged from apple; Chelonus (Microchelonus) zhangi and Pristomerus chinensis Ashmead were found from jujuba, wild jujuba and hawthorn. Parasitized percentage of Chelonus (Microchelonus) zhangi from apple, jujuba, wild jujuba and hawthorn were significantly different, being 16. 54%, 12. 85%, 7.34% and 1. 58%, respectively. Parasitized percentage of Pristomerus chinensis from jujuba, wild jujuba and hawthorn had significant difference, with the highest from apple as 5. 05%, and the lowest from hawthorn as 1. 09% . Developmental threshold and thermal constant of the period from early development of over - wintered larvae to adult emergence of Carposina sasakii and its parasitoid wasp from apple were measured under constant temperature. The results showed that developmental threshold were 7. 27[degree]C and 10. 96[degree]C and thermal constant were 208. 86 DD and 166. 73 DD in Carposina sasakii and Chelonus ( Microchelonus) zhangi, respectively. BR Nutrition. Diet. Life cycle and development. Parasites diseases and disorders. Parasites. Insect parasites. Hosts. Insect hosts. Abiotic factors. Physical factors. Land zones. Palaearctic region. Eurasia. Asia. China. Chelonus (Microchelonus) zhangi (Braconidae): Parasite; Pristomerus chinensis (Ichneumonidae): Parasite; Carposina sasakii (Carposinidae): Host. Carposina sasakii: Food plants, prevalence, Development, Development rate and developmental threshold, Hymenopteran parasites, Chelonus (Microchelonus) zhangi, Pristomerus chinensis, Temperature, Shaanxi; Chelonus (Microchelonus) zhangi: Development, Development rate and developmental threshold, prevalence, Lepidopteran hosts, Carposina sasakii, Temperature, Shaanxi; Pristomerus chinensis: Lepidopteran hosts, Carposina sasakii, Prevalence, Shaanxi. ST Animalia, Arthropoda, Insecta, Hymenoptera, Apocrita, Terebrantia, Ichneumonoidea, Braconidae; Animalia, Arthropoda, Insecta, Hymenoptera, Apocrita, Terebrantia, Ichneumonoidea, Ichneumonidae; Animalia, Arthropoda, Insecta, Lepidoptera, Glossata, Heteroneura, Copromorphoidea, Carposinidae. Arthropods; Hymenopterans; Insects; Invertebrates; Lepidopterans.