赤眼蜂中间寄主卵辐射保鲜研究

RADIATION PRESERVATION STUDY ON MIDDLE HOST EGGS OF TRICHOGRAMMA SPECIES

选用柞蚕(Antheraea pernyi)蛾卵作为松毛虫赤眼蜂(Trichogramma dendrolimi Matsumu-ra)的中间寄主。通过不同吸收剂量和不同贮存温度的保鲜效果,阐明电子束辐照柞蚕卵保鲜技术的可行性。结果表明电子束辐照与冰箱贮存相结合的方法使柞蚕卵的保鲜期显著延长。辐照卵于冰箱贮存89天后接蜂,测得母峰寄生率高达80%左右,羽化率、单卵出蜂数、子蜂雌性比以及子蜂个体大小和发育历期均为正常,对子蜂的传种接代能力和治虫效果没有不良影响。

Technical feasibility about the preservation of Antheraea per-nyi's eggs. which are used as middle hosts of Trichogramma dendrolimi Matsumura,irradiated by electron beam is studied in this paper. The effects of radiation dose,storage temperature on preservative time of eggs are discussed. The results reveal thatthe preservative time of Antheraea pernyi's eggs irradiated by electron beam, com-bining with storage in a refrigerator, is notably prolonged in contrast with the con-trol. When the irradiated eggs stored in a refrigerator for 89 days are serviced ashosts, the parasitic percentage for Trichogramma dendrolimi Matsumura is about80%. Besides, the emergence percentage, average numbers of parasitoids reproducedout of one egg, as well as body size, growing stage periods, and the sexual rate ofdescendant are all normal. Irradiated eggs have not any adverse effects on the abili-ties of Trichogramma species and their offspring in both bearing and controlling insect pests.