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据调查,在我市郊区寄生稻纵卷叶螟卵的寄生蜂以稻螟赤眼蜂Trichogramma japonicumAshmead为优势种。1976—1983年田间系统调查资料统计,8年平均,二代卵寄生率为5.59％±6.66％,三代卵寄生率为29.14％±15.52％,四代卵寄生率为22.41％±14.96％,对稻纵卷叶螟有一定的自然抑制作用。 为了保护利用稻纵卷叶螟的卵寄生蜂,有必要对寄生蜂的出蜂期给以预测。但是,初产一二天的稻纵卷叶螟卵(白色至淡黄色)难以区分
According to the survey, the parasitic wasp in the suburb of our city parasitized rice borer Trichogramma Trichogramma japonicumAshmead dominant species. According to the statistics of field system survey from 1976 to 1983, the average of the second generation eggs was 5.59% ± 6.66%, the average of the third generation eggs was 29.14% ± 15.52% and the fourth generation of eggs was 22.41% ± 14.96% Cnaphalocrocis medinalis has some natural inhibition. In order to protect the egg parasitoid using the rice leaf roller, it is necessary to predict the bee-feeding period of the parasitoids. However, the first and second days of rice leaf roller (white to light yellow) difficult to distinguish