Chinese Journal OF Rice Science ›› 2023, Vol. 37 ›› Issue (4): 427-435.DOI: 10.16819/j.1001-7216.2023.220804

• Research Papers • Previous Articles     Next Articles

Resistance Risk, Cross Resistance and Sublethal Effects of Methoxyfenozide on Rice Stemborers (Chilo suppressalis)

LIU Yan, HE Linfeng, WANG Shuchao, YANG Fengxia, GAO Congfen, WU Shunfan()   

  1. College of Plant Protection, Nanjing Agricultural University, Nanjing 210095, China
  • Received:2022-08-20 Revised:2022-12-25 Online:2023-07-10 Published:2023-07-17
  • Contact: *email: wusf@njau.edu.cn

二化螟对甲氧虫酰肼的抗性风险、交互抗性及亚致死效应研究

刘艳, 何林凤, 汪书超, 杨凤霞, 高聪芬, 吴顺凡()   

  1. 南京农业大学 植物保护学院,南京 210095
  • 通讯作者: *email: wusf@njau.edu.cn
  • 基金资助:
    国家自然科学基金优秀青年科学基金资助项目(32022011);三亚南京农业大学研究院引导资金项目(NAUSY-MS15);江苏省农业科技自主创新资金资助项目(CX[19]3003)

Abstract:

【Objective】 We aim to investigate the resistance risk, cross resistance, and sublethal effects of methoxyfenozide on Chilo suppressalis.【Method】 We established the susceptibility baseline of the rice stem borer to methoxyfenozide using rice seedling dipping method and diet incorporation method, respectively. We assessed its resistance risk using diet incorporation method and determined the cross resistance of methoxyfenozide-resistant C. suppressalis population to RH-5849, tebufenozide and fufenozide. Then, we evaluated the effects of sublethal concentration of RH-5849 and methoxyfenozide on the development and reproduction of C. suppressalis using rice seedling dipping method. 【Results】 The results showed that it took 7.7, 6.3, 5.2, 4.4, and 3.5 generations for C. suppressalis to acquire ten-fold resistance to methoxyfenozide when the realized heritability (h2) was 0.402, the slope was 2.451 and the average selective pressure was 50%, 60%, 70%, 80%, and 90%. The bioassay results showed that Yuyao-19 (YY-19) population with a moderate level of resistance to methoxyfenozide (RR=73.4) exhibited moderate cross resistance to fufenozide (RR=24.7) and tebufenozide (RR=26.1), and lower cross-resistance to RH-5849 (RR=2.9). The larval development duration significantly increased but the pupation rate and the pupal weight remarkably decreased after the treatment of sublethal dose of RH-5849 and methoxyfenozide to 2nd instar larvae of C. suppressalis. Moreover, the eclosion rate and the egg laying number per female of F0 and F1 generations decreased significantly after the treatment of sublethal dose of methoxyfenozide. 【Conclusion】 C. suppressalis has a high resistance risk to methoxyfenozide. The field population which exhibits a moderate level of resistance to methoxyfenozide has cross-resistance with other diacylhydrazines. A significant fitness cost is present in rice stem borers treated with a sublethal dose of methoxyfenozide.

Key words: Chilo suppressalis, methoxyfenozide, resistance risk assessment, cross resistance, fitness cost

摘要:

【目的】 明确二化螟对甲氧虫酰肼的抗性风险、交互抗性及亚致死效应。【方法】 分别采用饲料混药法和稻苗浸渍法建立了二化螟初孵和2龄幼虫对甲氧虫酰肼的敏感基线,采用饲料混药法评估了二化螟对甲氧虫酰肼的抗性风险;采用稻苗浸渍法测定了抗甲氧虫酰肼二化螟田间种群2龄幼虫对抑食肼、虫酰肼和呋喃虫酰肼的交互抗性以及亚致死浓度抑食肼和甲氧虫酰肼对二化螟生长发育与繁殖的影响。【结果】 当抗性现实遗传力(h2)为0.402,斜率为2.451,平均选择压力分别为50%、60%、70%、80%和90%时,二化螟对甲氧虫酰肼的抗性上升10倍分别需要7.7、6.3、5.2、4.4和3.5代;2019年采自余姚的二化螟田间种群(YY-19)对甲氧虫酰肼处于中等水平抗性(RR = 73.4倍),对呋喃虫酰肼(RR = 24.7倍)和虫酰肼(RR = 26.1倍)同样存在中等水平的交互抗性,对抑食肼(RR=2.9倍)有低水平交互抗性;采用亚致死浓度(LC25)抑食肼和甲氧虫酰肼处理二化螟2龄幼虫后,幼虫历期显著增加,化蛹率和F0代雌蛹重均显著降低。此外,F0和F1代的羽化率和单雌产卵量在经亚致死浓度甲氧虫酰肼处理后显著降低。【结论】 二化螟对甲氧虫酰肼具有较高的抗性风险。对甲氧虫酰肼产生抗性的田间二化螟种群与其他双酰肼类杀虫剂之间存在交互抗性。亚致死剂量甲氧虫酰肼处理二化螟具有显著的适合度代价。

关键词: 二化螟, 甲氧虫酰肼, 抗性风险评估, 交互抗性, 适合度代价