论文部分内容阅读
在山西省甘蓝夜蛾各代卵高峰期多点采卵,在室内羽化出蜂进行鉴定。结果显示,本省田间甘蓝夜蛾卵内的赤眼蜂有螟黄赤眼蜂、玉米螟赤眼蜂、广赤眼蜂3种。赤眼蜂种类分布与其寄主作物及周围作物分布有密切关系。其优势种在不同寄主作物和环境条件下有明显不同。田间试验表明,本省太原地区田间释放赤眼蜂防治第1代甘蓝夜蛾的适宜放蜂时期应为5月5～20日。田间释放螟黄赤眼蜂、玉米螟赤眼蜂、广赤眼蜂防治甘蓝夜蛾均可收到较好的防治效果。
In Shanxi Province, the peak of each generation egg oviposition eggs, in the indoor emergence of a bee identification. The results showed that the Trichogramma ostrich eggs in the field in the province had Trichogramma ostriniae, Trichogramma ostriniae and Trichogramma ostriniae. Trichogramma species distribution and its host crops and the distribution of surrounding crops are closely related. The dominant species are significantly different under different host crops and environmental conditions. Field trials showed that the suitable period for releasing the first generation cabbage budworm (Trichogramma bifidus) in the field in Taiyuan, the province, should be May 5-20. Trichosanthes yellow Trichogramma was released in the field, trichogramma ostriniae and Trichogramma ostriniae were able to receive good control effects.