2015
DOI: 10.1590/s0100-83582015000100012
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Abstract: -the aims of this study were to determine imazapyr efficacy for floating macrophyte control and ecotoxicology for non-target organisms. For the floating macrophyte control efficacy tests were used the doses of 0,5; 1,0; 2,0; 2,5; 3,0; 3,5 and 4,0 L ha -1 and a control with 10 replicates. The acute toxicology for non-target organisms was estimated by lethal concentration 50% (LC50 and EC50). The floating macrophyte control efficacy was over 90%. Imazapyr was classified as moderately toxic for the following biom… Show more

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Cited by 13 publications
(15 citation statements)
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References 12 publications
(6 reference statements)
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“…Azolla filiculoide exposed to the mixture of herbicides atrazine, isoproturon and alachlor (50+35+15%) showed CE50;21d of 60.0 µg L -1 (Coutris et al, 2011), and for Azolla pinnata exposed at 0.001 and 0.002 mg L (Cruz et al, 2015), which indicates a higher sensitivity of A. caroliniana to these herbicides than to the ones tested on this study using the same plant (A. caroliniana). ); however, they differed from the ones obtained by Coors and Frische (2011) with pyraclostrobin exposed to the alga (CE50 of 0.15 mg L -1 ).…”
Section: Ecotoxicity For a Carolinianamentioning
confidence: 54%
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“…Azolla filiculoide exposed to the mixture of herbicides atrazine, isoproturon and alachlor (50+35+15%) showed CE50;21d of 60.0 µg L -1 (Coutris et al, 2011), and for Azolla pinnata exposed at 0.001 and 0.002 mg L (Cruz et al, 2015), which indicates a higher sensitivity of A. caroliniana to these herbicides than to the ones tested on this study using the same plant (A. caroliniana). ); however, they differed from the ones obtained by Coors and Frische (2011) with pyraclostrobin exposed to the alga (CE50 of 0.15 mg L -1 ).…”
Section: Ecotoxicity For a Carolinianamentioning
confidence: 54%
“…For L. minor, the lethal concentration of 50% (CL50;7d) of atrazine was 5.27 mg L (Cedergreen et al, 2007); to the atrazine, isoproturon and alachlor mixture (50+35+15%), with CL50;96h of 70.0 µg L -1 (Coutris et al, 2011); and than imazapyr, with CL50;7d of 1.06 mg L -1 (Cruz et al, 2015); however, it was more sensitive to glyphosate (CL50 of 19.6 mg L -1 ) and to mecoprop, with 12.2 mg L -1 (Cedergreen et al, 2007 , and epoxiconazole, of 1.14 mg L -1 ; therefore, these authors mention that the magnification factor of the toxicity corresponded to 13.6 times in relation to the individual toxicity of each compound; however, this effect was not characterized for toxicity on L. minor.…”
Section: Ecotoxicity For L Minormentioning
confidence: 99%
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“…O uso de herbicidas para o controle de plantas aquáticas é fundamental para o estabelecimento de estratégias de manejo. O bispyribac-sodium foi testado no controle de Sagittaria lancifolia (Glomski e Mudge, 2013); a mistura de glyphosate com saflufenacil foi utilizada no controle de Brachiaria decumbens (Queiroz et al, 2014); o 2,4-D para o Myriophyllum heterophyllum (Haug e Bellaud, 2013); o imazapyr para o controle de plantas aquáticas flutuantes (Cruz et al, 2015a); e o arylpicolinate para Alternanthera philoxeroides (Richardson et al, 2016). Outro ponto importante foi aprovação da Resolução nº 467 Publicada no DOU nº 135, de 17 de julho de 2015 que dispõe sobre critérios para a autorização de uso de produtos ou de agentes de processos físicos, químicos ou biológicos para o controle de organismos ou contaminantes em corpos hídricos superficiais (Brasil, 2015) que passou a regulamentar o uso do controle químico em ambientes onde a necessidade de intervenção de plantas aquáticas.…”
Section: Introductionunclassified