低氧对PH_3抗性米象和谷蠹的控制作用研究

Effect of hypoxia on phosphine resistance of sitophilus oryzae(linné)and rhizopertha dominica(fabricius)

针对米象Sitophilus oryzae(Linné)和谷蠹Rhizopertha dominica(Fabricius)等主要储粮害虫对PH_3抗性越来越高,单一使用PH_3防治难度加大等问题,对2%和5%氧浓度环境控制不同PH_3抗性米象和谷蠹成虫及F1代的效果进行了实验室验证。结果表明:氧气浓度为2%时,PH_3抗性的米象和谷蠹成虫在6 d内全部死亡,无F1代出现;氧气浓度为5%时,28 d后PH_3抗性米象和谷蠹成虫的死亡率小于50%,抗性谷蠹和米象均无F1代出现。

Phosphine resistance of main stored grain insects such as Rhizopertha dominica（ Fabricius） and Sitophilus oryzae（ Linné） increased and,controlling insects by only PH_3 was more difficulty than ever.Low oxygen concentrations were used to control lesser grain borer and rice weevil and offspring with different resistance level to phosphine. The results showed that lesser grain borer and rice weevil adult can be all killed in 2 % oxygen concentrations within 6 days,without offspring,lesser grain borer and rice weevil adult can be killed less than 50 % in 5 % oxygen concentrations after 28 days,without offspring.