Chines Journal of Vector Biology and Control ›› 2013, Vol. 24 ›› Issue (4): 304-307.DOI: 10.11853/j.issn.1003.4692.2013.04.007

• Original reports • Previous Articles     Next Articles

Toxicities of chlorfenapyr and thiamethoxam to termites and synergistic effect of their mixture

LIN Yan1, HE Li-wen1, GUO Hong2   

  1. 1 Nanjing Termite Control Institute, Nanjing 200014, Jiangsu Province, China;
    2 Nanjing Lishui County Termite Control Station
  • Received:2013-02-25 Online:2013-08-20 Published:2013-08-20
  • Supported by:

    Supported by the Scientific Research Project of MOHURD'S(No. 2013-R2-12)and Scientific Research Project of Nanjing Municipal Commission of Housing and Urban-rural Development(No. KS1125)

虫螨腈、噻虫嗪对白蚁的毒力测定及复配剂增效作用研究

林雁1, 何利文1, 郭红2   

  1. 1 南京市白蚁防治研究所, 江苏 南京 200014;
    2 南京市溧水县白蚁防治所
  • 作者简介:林雁(1975- ),女,硕士研究生,高级工程师,从事白蚁防治研究。Email: 1102279325@qq.com
  • 基金资助:

    国家住房和城乡建设部2013年科研项目(2013-R2-12);南京市住房和城乡建设委员会2011年科研项目(KS1125)

Abstract:

Objective To determine the toxicities of chlorfenapyr and thiamethoxam to termites (Coptotermes formosanus) and the synergistic effect of their mixtures at different ratios. Methods In the laboratory, termites were kept in contact with filter papers treated with different concentrations of termiticides (1 ml), and the mortalities of treated termites were recorded periodically. Results The mortality of termites treated with chlorfenapyr was relatively high during hours 48-72 and 72-96, while that of termites treated with thiamethoxam was relatively high during hours 24-48, 48-72, and 72-96. The termite's mortality from either termiticide was low (<10%) within 24 h. After 96 h of treatment for C. formosanus, the LC50 of chlorfenapyr was 1.854 mg/L, and that of thiamethoxam was 386.021 mg/L. When mixed at an effective component ratio of 1:(40-80), chlorfenapyr and thiamethoxam achieved a maximum synergistic effect, with co-toxicity coefficients of 1411.65 and 1767.79, respectively. Conclusion Chlorfenapyr and thiamethoxam act slowly to kill termites. The toxicity of chlorfenapyr to termites is 208 times that of thiamethoxam. Chlorfenapyr mixed with thiamethoxam at different ratios can achieve a marked synergistic effect.

Key words: Chlorfenapyr, Thiamethoxam, Termite, Mixture, Synergistic effect

摘要:

目的 研究虫螨腈、噻虫嗪及2种药物不同比例的复配剂对白蚁毒力和增效情况。方法 通过室内药膜法,将1 ml不同浓度的药液处理滤纸后投入白蚁,持续接触,定期记录白蚁的死亡情况。结果 虫螨腈引起白蚁死亡率较高的时间发生在48~72 h和72~96 h时间段,噻虫嗪引起白蚁死亡的时间主要在24~48 h、48~72 h和72~96 h时间段,在24 h内,2种药物引起白蚁死亡率都不高(<10%)。96 h后,白蚁的LC50值虫螨腈为1.854 mg/L,噻虫嗪为386.021 mg/L。虫螨腈和噻虫嗪在复配比例1:40和1:80(有效成分比)时,对白蚁的增效作用最显著,共毒系数分别为1411.65和1767.79。结论 虫螨腈和噻虫嗪均为慢性杀白蚁药物,虫螨腈对白蚁的毒力比噻虫嗪高,前者为后者的208倍;虫螨腈和噻虫嗪的不同复配比例对白蚁均有显著的增效作用。

关键词: 虫螨腈, 噻虫嗪, 白蚁, 复配剂, 增效作用

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