Environmental fate and toxicology of fipronil

Gunasekara, Amrith S.; Truong, Tresca; Goh, Kean S.; Spurlock, Frank; Tjeerdema, Ronald S.

doi:10.1584/jpestics.r07-02

Cited by 328 publications

(288 citation statements)

References 35 publications

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“…The computed amount of fipronil likely to be degraded in the present study under different treatments were 92.6, 45.6, 76.4, 90.7 and 86.1 % of initially applied fipronil that was dissipated under control, FCD @ 0.5 t ha -1 , FYM; PMC; CS and gypsum each @ 5 t ha -1 , respectively. Degradation of fipronil in the soil from exposure to sunlight at the surface has been reported to produce fipronil-desulfinyl, oxidation near the surface to yield fipronil-sulfone, hydrolysis throughout the upper layer to produce fipronilamide and reductive processes below the surface to produce fipronil-sulfide (Gunasekara et al 2007). Since the study was conducted under saturated flow condition, the principal degradation product under reducing conditions was likely to be fipronil sulfide as noted by Doran et al (2006) for rice soils.…”

Section: Resultsmentioning

confidence: 99%

Potential of some soil amendments in reducing leaching of fipronil to groundwater

Joshi

Srivastava

2015

Int. J. Environ. Sci. Technol.

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The efficacy of different soil amendments in reducing the leaching of fipronil to groundwater was examined in soil columns under laboratory conditions. The polyvinyl chloride columns were sequentially filled with soils of different depths simulating natural conditions. Different soil amendments namely fresh cow dung (FCD) slurry @ 0.5 t ha -1 , farmyard manure @ 5.0 t ha -1 , press mud compost @ 5.0 t ha -1 , cereal straw @ 5.0 t ha -1 and gypsum @ 5.0 t ha -1 were applied on the top soil. The application of farmyard manure, cereal straw and gypsum decreased the soil pH, and except FCD, all the amendments increased the electrical conductivity of the soil. Among different soil amendments, press mud compost and cereal straw were the most effective in reducing leaching of the fipronil to groundwater. Fipronil residues in soil columns after leaching indicated that all soil amendments effectively increased the retention of fipronil in soil; however, press mud compost and cereal straw also dissipated higher amount of fipronil. The results also revealed a higher retention of applied fipronil with lower degradation and leaching under application of 0.5 t FCD ha -1 as organic amendment in soil in comparison with the unamended soil.

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Section: Resultsmentioning

confidence: 99%

Potential of some soil amendments in reducing leaching of fipronil to groundwater

Joshi

Srivastava

2015

Int. J. Environ. Sci. Technol.

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“…Malhada (BA), 2011. (Coutinho et al, 2005;Gunasekara;Troung, 2007). Na avaliação do 14º dia após aplicação, não houve diferença significativa entre os tratamentos, sendo observado um restabelecimento da abundância de predadores na área (Tabela 2).…”

Section: Resultados E Discussão Efeito Dos Inseticidas Sobre Predadoresunclassified

Seletividade de inseticidas a alguns dos inimigos naturais na cultura do algodão

Diamantino

Castellani²,

Forti

et al. 2014

Arq. Inst. Biol.

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O objetivo foi estudar a seletividade de inseticidas aos inimigos naturais na cultura do algodão (Gossypium hirsutum L.r. latifolium Hurtch), cultivar DeltaOpal, no município de Malhada (BA) e conhecer a fauna benéfica associada. O trabalho foi conduzido na safra 2010/2011, com delineamento experimental em blocos ao acaso, com seis tratamentos e quatro repetições, sendo os tratamentos: (1) Fipronil 200 SC (0,38 L.ha-1); (2) Alfacipermetrina 100 SC (0,30 L.ha-1); (3) Lufenuron 50 CE (0,30 L.ha-1); (4) Imidacloprid 200 SC (0,30 L.ha-1); (5) Paration Metil 600 CE (1,00 L.ha-1); e (6) Testemunha (água). A aplicação dos produtos foi feita 80 dias após a emergência, com avaliações um dia antes da aplicação e 1, 7 e 14 dias após a aplicação (DAA) por meio do pano de batida e armadilha Moericke. Em laboratório, os insetos foram triados, contados e identificados em famílias. A toxicidade dos produtos varia em função do grupo do inimigo natural. A Imidacloprida é seletiva às aranhas, sendo os demais inseticidas medianamente tóxicos (Alfacipermetrina e Paration Metil: 1º e 14º DAA; Lufenuron: 14º DAA) ou tóxicos (Fipronil e Alfacipermetrina: 7º DAA). Fipronil (1º DAA), Alfacipermetrina (7º DAA) e Paration Metil (14º DAA) são medianamente tóxicos aos adultos de joaninhas. Os inseticidas estudados são tóxicos às larvas de joaninhas, com mais impacto até os sete dias após a aplicação, com exceção do Paration Metil, classificado como inócuo até esse período. Registra-se a ocorrência de 13 famílias de aranhas e 18 famílias de hymenópteros parasitoides em agroecossistema de algodão na região de Malhada (BA).

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“…Laboratory and field studies conducted by Rhone Poulenc on different soil types under different temperature conditions identified five principal metabolites (desufinyl, sulfone, sulfide, amide, and a photodegradation product), which occur through degradation pathways of hydrolysis, photolysis, oxidation, and reduction (2). A comprehensive review of the environmental fate and toxicology of fipronil can be found in Gunasekara et al (3).…”

Section: Usda Forest Service Starkville Ms 39759 2 Clemson Universimentioning

confidence: 99%

Fipronil: Toxicity to Subterranean Termites and Dissipation in Soils

Mulrooney¹,

Wagner²,

Gerard³

2009

ACS Symposium Series

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Fipronil (Termidor 80 WG) was applied to covered and exposed plots at one secondary and four primary USDA Forest Service termiticide test sites in the U.S. Residue analyses and bioassays of soil samples were conducted over 5 y. Fipronil had an exponential decay at all sites. The DT 50 of fipronil in a silt loam soil in Oktibbeha Co., MS in covered and exposed plots was 202 and 177 d, respectively. Fipronil dissipation appeared to be faster at the secondary site (Oktibbeha Co, MS) compared to the primary tests sites. Dissipation was faster in covered plots in AZ and MS compared to FL and SC; while that in exposed plots was similar among sites. In 7 d bioassays, termite penetration of soil cores from primary test sites was significantly greater in exposed plots (33.9 ± 1.2 mm) than that from covered plots (25.7 ± 1.2 mm). Differences in termite penetration and termite mortality between covered and exposed plots at the secondary test site were not significant. Average distance penetrated by termites, averaged over treatments and primary sites, significantly increased during the last three years (37.2 mm) of sampling compared to the first three sampling times (20.7 mm). Termite mortality averaged over sites and years for covered and exposed plots was not significantly different. Freundlich adsorption coefficients (K f ), determined from adsorption isotherms, ranged from 0.14 on a gravelly sand (Pima Co., AZ) to 5.47 on a silt loam (Oktibbeha Co. MS).

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Environmental fate and toxicology of fipronil

Cited by 328 publications

References 35 publications

Potential of some soil amendments in reducing leaching of fipronil to groundwater

Potential of some soil amendments in reducing leaching of fipronil to groundwater

Seletividade de inseticidas a alguns dos inimigos naturais na cultura do algodão

Fipronil: Toxicity to Subterranean Termites and Dissipation in Soils

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