硼酸对德国小蠊 (L.) (Blattodea: Blattellidae) 的不同龄期具有口服毒性，并导致肠道微生物群失调,Pesticide Biochemistry and Physiology

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硼酸对德国小蠊 (L.) (Blattodea: Blattellidae) 的不同龄期具有口服毒性，并导致肠道微生物群失调
Pesticide Biochemistry and Physiology ( IF 4.2 ) Pub Date : 2021-02-01 , DOI: 10.1016/j.pestbp.2020.104756
Meng Jiang , Feng-Yue Dong , Xiao-Yuan Pan , Ya-Nan Zhang , Fan Zhang

摘要硼酸是一种成熟的化学杀虫剂，对各类蟑螂具有良好的防治效果。在这项研究中，我们研究了硼酸对不同龄期德国小蠊（Blattella Germanica）的口服毒力作用，并通过高通量测序技术表征了其对肠道微生物群的影响。经口毒性试验结果表明，硼酸的毒性与其浓度呈正相关，与蟑螂若虫的龄期呈负相关。1～3龄若虫对硼酸的敏感性最强，半致死时间仅为3.16 d，而6～7龄若虫对硼酸的敏感性最弱，半致死时间为10.15 d。雄性和雌性昆虫对硼酸的敏感性没有显着差异。口服硼酸导致蟑螂的生态失调严重，可降解多种复杂大分子的拟杆菌和可抑制病原微生物的肠球菌的相对丰度显着降低，而机会致病菌魏氏菌的相对丰度显着降低。显着增加。据推测，肠道微生物群的失调可能会加速硼酸对德国蟑螂的毒性。显着减少，而机会致病菌 Weissella 的相对丰度显着增加。据推测，肠道微生物群的失调可能会加速硼酸对德国蟑螂的毒性。显着减少，而机会致病菌 Weissella 的相对丰度显着增加。据推测，肠道微生物群的失调可能会加速硼酸对德国蟑螂的毒性。

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Boric acid was orally toxic to different instars of Blattella germanica (L.) (Blattodea: Blattellidae) and caused dysbiosis of the, gut microbiota

Abstract Boric acid, a well-established chemical insecticide, has a good control effect on various types of cockroaches. In this study, we investigated the oral virulence effect of boric acid on German cockroach (Blattella germanica) of various instars and characterized its effect on the gut microbiota by high-throughput sequencing technology. The results of an oral toxicity test showed that the toxicity of boric acid was positively correlated with its concentration and negatively correlated with the instar of cockroach nymphs. The 1–3 instar nymphs showed the strongest sensitivity to boric acid, which exhibited a half-lethal time of only 3.16 d, while the 6–7 instar nymphs showed the weakest sensitivity, and exhibited a half-lethal time of 10.15 d. There was no significant difference between male and female insects regarding their sensitivity to boric acid. Oral treatment of boric acid resulted in severe dysbiosis in cockroaches, the relative abundances of Bacteroides, which can degrade a variety of complex macromolecules, and Enterococcus, which can inhibit pathogenic microorganisms, were significantly reduced, while the relative abundance of the opportunistic pathogenic bacterium Weissella was significantly increased. It was speculated that dysbiosis of gut microbiota might accelerate the toxicity of boric acid on German cockroaches.

更新日期：2021-02-01

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