RADIATION PRESERVATION STUDY ON MIDDLE HOST EGGS OF TRICHOGRAMMA SPECIES

Technical feasibility an the preservation of Antheraea pernyi's eggs, which are used as the middle hosts of Trichograma dendrolimi Matsumura , irradiated by electron beam is studied in this paper . The results r eveal that the preservative time of Antheraea pernyi's eggs irradiated by electron beam, combining with storage in a refrigerator, is notabl y prolonged in contrast with the control. When the irradiated eggs sto red in a refrigerator for 89 days are serviced as hosts, the parasitic percentage for Trichogramma dendrolimi Matsumura is about 80%. Beside s, the emergence percentage , average numbers of parasitoids reproduce d out of one egg, as well as body size, growing stage periods, and sex ual rate of descendant are all normal. Irradiated eggs have not any ad verse effects on the abilities of Trichogramma species and their offsp ring in both bearing and controlling insect pests.