论文部分内容阅读
采用 Potter’s 喷雾塔喷雾的方法测定广州和深圳菜区小菜蛾对儿丁质合成抑制剂定虫隆、氟虫脲、伏虫隆、氟铃脲的抗药性。结果表明,深圳菜区小菜蛾对定虫隆产生明显抗性,1990年11月测定抗性倍数为15.0,1991年12月为70.9,对氟虫脲、伏虫隆、氟铃脲具有不同程度交互抗性,抗性倍数分别为26.7,15.5 和5.8。广州菜区小菜蛾对以上药剂均未产生抗性(抗性倍数最高为2.8)。采用浸渍法测定小菜蛾对苏云金杆菌 Bt 抗性的结果表明,深圳菜区小菜蛾对 Bt 的抗性逐年提高,1990年12月测定的抗性倍数为21.1,1991年12月为26.9,1992年3月为35.0,广州菜区小菜蛾具有强的耐药性或低抗药性,抗性倍数8—9。
Potter’s spraying tower spray method was used to determine the resistance of the diamondback moth to the insecticides, fluconazole, fluvoxuron and hexaflumuron in the diamondback moth, Guangzhou and Shenzhen. The results showed that the diamondback moth in Shenzhen had significant resistance to the insecticidal insecticide, and the resistance multiple was 15.0 in November 1990 and 70.9 in December 1991, showing different degrees of flufenoxuron, fluvoxuron and hexaflumuron The cross resistance and resistance multiples were 26.7, 15.5 and 5.8 respectively. The diamondback moth in Guangzhou had no resistance to the above agents (up to 2.8 fold). The results of dipping method to determine Bt resistance to Bacillus thuringiensis in Plutella xylostella showed that the resistance of Plutella xylostella to Bt in Shenzhen district increased year by year, and the resistance multiple was 21.1 in December 1990, 26.9 in December 1991 March was 35.0, and the diamondback moth in Guangzhou had strong resistance or low resistance, with the resistance multiple of 8-9.