Efficacy of Bifenthrin Treatment Zones Against Red Imported Fire Ant

Pranschke, A.M.; Hooper‐Bùi, Linda M.; Moser, Barry

doi:10.1093/jee/96.1.98

Cited by 7 publications

(2 citation statements)

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“…Bifenthrin is an effective pyrethroid insecticide that is widely used in both agricultural and urban environments (34)(35)(36). However, due to its high toxicity against aquatic organisms and its potential risk to human health, bifenthrin residue in the environment has drawn increasing public concern (37-39).…”

Section: Resultsmentioning

confidence: 99%

Molecular Mechanism and Genetic Determinants of Buprofezin Degradation

Zhao

Qiu

et al. 2017

Appl Environ Microbiol

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Buprofezin is a widely used insect growth regulator whose residue has been frequently detected in the environment, posing a threat to aquatic organisms and nontarget insects. Microorganisms play an important role in the degradation of buprofezin in the natural environment. However, the relevant catabolic pathway has not been fully characterized, and the molecular mechanism of catabolism is still completely unknown. Rhodococcus qingshengii YL-1 can utilize buprofezin as a sole source of carbon and energy for growth. In this study, the upstream catabolic pathway in strain YL-1 was identified using tandem mass spectrometry. Buprofezin is composed of a benzene ring and a heterocyclic ring. The degradation is initiated by the dihydroxylation of the benzene ring and continues via dehydrogenation, aromatic ring cleavage, breaking of an amide bond, and the release of the heterocyclic ring 2-tert-butylimino-3-isopropyl-1,3,5-thiadiazinan-4-one (2-BI). A buprofezin degradation-deficient mutant strain YL-0 was isolated. A comparative genomic analysis combined with gene deletion and complementation experiments revealed that the gene cluster bfzBA3A4A1A2C is responsible for the upstream catabolic pathway of buprofezin. The bfzA3A4A1A2 cluster encodes a novel Rieske nonheme iron oxygenase (RHO) system that is responsible for the dihydroxylation of buprofezin at the benzene ring; bfzB is involved in dehydrogenation, and bfzC is in charge of benzene ring cleavage. Furthermore, the products of bfzBA3A4A1A2C can also catalyze dihydroxylation, dehydrogenation, and aromatic ring cleavage of biphenyl, flavanone, flavone, and bifenthrin. In addition, a transcriptional study revealed that bfzBA3A4A1A2C is organized in one transcriptional unit that is constitutively expressed in strain YL-1. IMPORTANCEThere is an increasing concern about the residue and environmental fate of buprofezin. Microbial metabolism is an important mechanism responsible for the buprofezin degradation in the natural environment. However, the molecular mechanism and genetic determinants of microbial degradation of buprofezin have not been well identified. This work revealed that gene cluster bfzBA3A4A1A2C is responsible for the upstream catabolic pathway of buprofezin in Rhodococcus qingshengii YL-1. The products of bfzBA3A4A1A2C could also degrade bifenthrin, a widely used pyrethroid insecticide. These findings enhance our understanding of the microbial degradation mechanism of buprofezin and benefit the application of strain YL-1 and bfzBA3A4A1A2C in the bioremediation of buprofezin contamination.

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Section: Resultsmentioning

confidence: 99%

Molecular Mechanism and Genetic Determinants of Buprofezin Degradation

Zhao

Qiu

et al. 2017

Appl Environ Microbiol

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“…Neoh et al, found after exposed to chlorantraniliprole termitea were likely to cease feeding and undergo starvation, which made the pesticide low efficiency 35 . Because in the management of social insect, repellent or fast-acting toxicant may provide effective barriers 36 . Non-radiolable rubidium (Rb) have been used as a good trace in termites' trophallaxis process [37][38][39] , but had not yet been reported in S.invicta.…”

Section: Discussionmentioning

confidence: 99%

Insecticidal and P450 mediate mechanism of fluralaner against Red Imported Fire Ant, Solenopsis invicta (Hymenoptera: Formicidae)

Xiong¹,

Ling²,

Liu³

et al. 2020

Preprint

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The increasing consumption of pesticides caused lots of problems, such as resistance, food safety, and various environmental toxicity. Finding an alternative pesticide which is environmentally friendly is urgent and crucial. Fluralaner, a novel isoxazoline insecticide, has been proven to possess selective toxicity for insects versus mammals and have safety to mammals and nontarget organism, suggesting its potential in pest’s management. However, little information is available about its effect on the red imported fire ant (Solenopsis invicta), a worldwide invasive and polyphagous pest, often nest in neighborhood area.The toxicity results showed that the topical application and feeding application was all effective to S.invicta. Moreover, fluralaner can be transmitted among workers by contacting and feeding which lead to toxic reaction among nestmates. By exploring the biochemistry change, we found cytochrome P450 monooxygenase (P450) may be involved in the detoxification of fluralaner but not carboxylesterase (CarE) and glutathione S-transferase (GST). Synergism assays gave a solid evidence in which piperonyl butoxide, an activity inhibitor of P450, increased the toxicity of fluralaner to S. invicta. Importantly, with the qRT-PCR analysis 12 P450 genes of S.invicta were significantly upregulated after fluralaner treatment. Our result indicated that fluralaner could be a potential alternative pesticide in S. invicta control. And the involvement of P450s on metabolism provides basic information for the sustainable use of fluralaner.

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Thermal and other analytical studies on bifenthrin urea co-inclusion complex

Dhall

Мадан

2017

J Therm Anal Calorim

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Efficacy of Bifenthrin Treatment Zones Against Red Imported Fire Ant

Cited by 7 publications

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Molecular Mechanism and Genetic Determinants of Buprofezin Degradation

Molecular Mechanism and Genetic Determinants of Buprofezin Degradation

Insecticidal and P450 mediate mechanism of fluralaner against Red Imported Fire Ant, Solenopsis invicta (Hymenoptera: Formicidae)

Thermal and other analytical studies on bifenthrin urea co-inclusion complex

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