河南农业科学 ›› 2021, Vol. 50 ›› Issue (7): 110-116.DOI: 10.15933/j.cnki.1004-3268.2021.07.013

• 植物保护 • 上一篇    下一篇

吡虫啉对异迟眼蕈蚊抗性筛选及其对解毒酶活性的影响

张睿,何超,李河,沈登荣,袁盛勇,李珣   

  1. (红河学院生命科学与技术学院/云南省高校滇南特色生物资源研究与利用重点实验室,云南蒙自661199)
  • 收稿日期:2020-11-20 出版日期:2021-07-15 发布日期:2021-07-15
  • 通讯作者: 沈登荣(1982-),男,云南保山人,副教授,博士,主要从事昆虫生态与害虫综合治理研究。E-mail:ynshdr@126.com
  • 作者简介:张睿(1984-),女,云南大理人,讲师,博士,主要从事昆虫生理生态学研究。E-mail:zhangrui216@163.com
  • 基金资助:
    云南省地方本科高校联合基金项目(2017FH001-038);云南省教育厅科研基金项目(2019J0652);红河学院科研基金博士专项(XJ19B04);红河学院应用型课程建设项目(YYKC171017)

Effects of Imidacloprid on Resistance Selection and Activity of Detoxifying Enzyme in Bradysia difformis Frey

ZHANG Rui,HE Chao,LI He,SHEN Dengrong,YUAN Shengyong,LI Xun   

  1. (College of Life Science and Technology,Honghe University/Key Laboratory for Research and Utilization of Characteristic
    Biological Resources in Southern Yunnan,Mengzi 661199,China)
  • Received:2020-11-20 Published:2021-07-15 Online:2021-07-15

摘要: 异迟眼蕈蚊是一种食用菌的主要害虫。为探讨该虫对吡虫啉的抗性风险及生化机制,在室内采用吡虫啉对异迟眼蕈蚊进行抗性筛选并进行抗性现实遗传力(h2)分析,测定吡虫啉亚致死剂量(LC10、 LC20和LC40)处理下异迟眼蕈蚊解毒酶活性。结果表明,抗性筛选21代后异迟眼蕈蚊抗性倍数为4.09 倍,该虫对吡虫啉处于敏感性下降水平。异迟眼蕈蚊对吡虫啉的抗性现实遗传力(h2)为0.091 3,当选择压力在80%~90%时,预测异迟眼蕈蚊抗性增长10倍需要15.9~20.1代。随着吡虫啉亚致死剂量的增加,敏感品系和抗性品系异迟眼蕈蚊的多功能氧化酶O-脱甲基和羧酸酯酶活性逐渐上升,均在LC40处理48 h达到峰值,此时多功能氧化酶O-脱甲基活性分别较空白对照上升了63.81%和119.42%,羧酸酯酶活性分别较空白对照上升了18.40%和48.13%。综上,异迟眼蕈蚊对吡虫啉产生抗性的风险较低,多功能氧化酶和羧酸酯酶活性的增强与异迟眼蕈蚊对吡虫啉产生代谢抗性有密切关系。

关键词: 迟眼蕈蚊, 吡虫啉, 抗性筛选, 抗性现实遗传力, 亚致死剂量, 多功能氧化酶, 羧酸酯酶

Abstract: Bradysia difformis is one of the main pests of edible fungi. In order to investigate the resistance risk and biochemical mechanism of B.difformis to imidacloprid,resistance selection and realized heritability(h2) of B.difformis to imidacloprid were analyzed in the laboratory,and the detoxifying enzyme activities of B.difformis treated with sublethal doses of imidacloprid(LC10,LC20 and LC40)were determined. The results showed that the resistance ratio of B. difformis was 4.09 times after 21 generations of resistant selection,and resistance level of B.difformis was sensitivity drop to imidacloprid.The realized heritability(h2) of B.difformis to imidacloprid was 0.091 3,it would take 15.9—20.1generations to achieve 10⁃fold resistance under the selection pressure of 80% to 90%. With the increase of the sublethal dose of imidacloprid,the activities of mixed function oxidase O⁃demethylation and carboxylesterase in susceptible strain and resistant strain of B.difformis increased gradually,and both reached the peak value at 48 h after LC40 treatment,at this time,the activities of mixed function oxidase O⁃demethylation in susceptible strain and resistant strain increased by 63.81% and 119.42%,and the activities of carboxylesterase in susceptible strain and resistant strain increased by 18.40% and 48.13%,respectively,compared with blank control. These results indicated that the resistance risk of B.difformis to imidacloprid was low,and the enhanced activities of mixed function oxidase and carboxylesterase were closely related to the metabolic resistance of B. difformis to imidacloprid.

Key words: Bradysia difformis, Imidacloprid, Resistance selection, Realized heritability, Sublethal dose, Mixed function oxidase, Carboxylesterase

中图分类号: