keyword
https://read.qxmd.com/read/32162474/estimating-sorption-of-monovalent-acidic-herbicides-at-different-ph-levels-using-a-single-sorption-coefficient
#21
JOURNAL ARTICLE
Claudio A Spadotto, Martin A Locke, Ronald L Bingner, Rafael Mingoti
BACKGROUND: Monovalent acidic pesticide sorption can be determined for any soil pH if the dissociation constant of the compound is known, and sorption coefficients are available for at least two different pH values, measured in a wide enough range to enable estimating both neutral and anionic form coefficients. Sorption estimates have also been made from a single sorption coefficient available, assuming a non-compound specific value of the anionic form sorption coefficient or considering a generic ratio between sorption coefficients of the two forms...
March 11, 2020: Pest Management Science
https://read.qxmd.com/read/31788953/a-novel-mutation-a212t-in-chloroplast-protoporphyrinogen-oxidase-ppo1-confers-resistance-to-ppo-inhibitor-oxadiazon-in-eleusine-indica
#22
JOURNAL ARTICLE
Bo Bi, Qiang Wang, Jeffrey J Coleman, Aimone Porri, John M Peppers, Jinesh D Patel, Michael Betz, Jens Lerchl, J Scott McElroy
BACKGROUND: Protoporphyrinogen oxidase (PPO) with two isoforms, chloroplast-targeted (PPO1) and mitochondrial-targeted (PPO2), catalyzes a step in the biosynthesis of chlorophyll and heme. PPO1 and PPO2 are herbicide target sites of PPO-inhibiting herbicides. Target-site mutations conferring resistance to PPO inhibitors have all thus far been in PPO2. Oxadiazon is a unique PPO inhibitor utilized for preemergence Eleusine indica control. In this research, we evaluated the response of two previously confirmed oxadiazon-resistant and susceptible E...
May 2020: Pest Management Science
https://read.qxmd.com/read/31400780/predicting-herbicide-movement-across-semi-permeable-membranes-using-three-phase-partitioning
#23
JOURNAL ARTICLE
Hudson K Takano, Eric L Patterson, Scott J Nissen, Franck E Dayan, Todd A Gaines
Herbicide efficacy depends on herbicides crossing cell and organelle membranes. We evaluated an artificial membrane system to understand how herbicides cross biological membranes. This understanding aids in predicting herbicide behavior in planta and, consequently, efficacy, mode of action, and whether active transporter-based herbicide resistance mechanisms may be possible. Five herbicides with different log Kow and pKa values were assessed: glyphosate, 2,4-D, clopyralid, sulfentrazone and glufosinate. The artificial membrane apparatus included four semipermeable membranes containing buffers with pH 2...
September 2019: Pesticide Biochemistry and Physiology
https://read.qxmd.com/read/31364395/tolerance-and-remedial-potential-of-trees-submitted-to-atrazine-and-sulfentrazone-in-the-rhizosphere
#24
JOURNAL ARTICLE
Edson Aparecido Dos Santos, Uelson Sabino da Silva Filho, Gabriela Madureira Barroso, Breno Preslei Júnio Silvestre Rocha, Ernani Lopes Possato
Residual herbicides are important for agricultural production but they may be lost underground. Trees capable of removing or degrading these products are interesting to the agro system. The objective was to evaluate the tolerance and remedial potential of trees in soil contaminated by atrazine and sulfentrazone. The experiment was arranged in a 7 × 3 factorial scheme. Factor one was composed of Inga edulis Mart., Myrsine gardneriana A.DC., Schizolobium parahyba (Vell.) Blake, Toona ciliata M. Roem., Trichilia hirta L...
2020: International Journal of Phytoremediation
https://read.qxmd.com/read/31190300/effects-of-ecologically-relevant-concentrations-of-boral%C3%A2-500-sc-glifosato%C3%A2-biocarb-and-a-blend-of-both-herbicides-on-markers-of-metabolism-stress-and-nutritional-condition-factors-in-bullfrog-tadpoles
#25
JOURNAL ARTICLE
Anike L L Wilkens, Artur A N Valgas, Guendalina T Oliveira
The aim of this study was to verify the effects of the isolated forms of Boral® SC 500, Glifosato® Biocarb herbicides, and a blend of both herbicides on metabolism and oxidative balance markers of Rana catesbeiana tadpoles and on their nutritional condition. Groups of tadpoles were divided into different treatments: control (no herbicides), Boral® 500 SC (sulfentrazone: 130 μg/L), Glifosato® Biocarb (glyphosate: 234 μg/L), and a blend of both herbicides. After 7 days, the liver, caudal muscle, and blood samples were taken to subsequently perform the biomarkers determination by spectrophotometry...
August 2019: Environmental Science and Pollution Research International
https://read.qxmd.com/read/30656954/phytoremediation-and-natural-attenuation-of-sulfentrazone-mineralogy-influence-of-three-highly-weathered-soils
#26
JOURNAL ARTICLE
Esequiel Santos, Fábio Ribeiro Pires, Amanda Duim Ferreira, Fernando Barboza Egreja Filho, João Carlos Madalão, Robson Bonomo, Paulo Roberto da Rocha Junior
This study evaluated remediation of the herbicide sulfentrazone in soils with three different mineralogies (kaolinite, hematite, and gibbsite) and three remediation sulfentrazone treatments (Canavalia ensiformis L., Crotalaria juncea L., and natural attenuation). This study was conducted in a factorial scheme, in triplicate with randomized block design. Sulfentrazone was applied at 0 and 400 g ha-1 . We analyzed sulfentrazone residue in the soils by high-performance liquid chromatography and confirmed the results with bioassays of Pennisetum glaucum...
January 18, 2019: International Journal of Phytoremediation
https://read.qxmd.com/read/30220066/behavioral-response-and-dynamics-of-eisenia-fetida-hemocytes-exposed-to-environmentally-relevant-concentration-of-sulfentrazone
#27
JOURNAL ARTICLE
Carlos Mesak, Raphael Pires de Campos, Marcela Amaral de Melo, Bruna de Oliveira Mendes, Guilherme Malafaia
Although the toxicity of the pesticide sulfentrazone in some aquatic organisms is known, its effects on edaphic organisms such as earthworms remain completely unknown. Thus, we aimed at evaluating the behavior and immune response of Eisenia fetida exposed to sulfentrazone at environmentally relevant concentrations (EC). E. fetida representatives exposed to this contaminant (for 48 h) were divided in the following groups: environmental concentration (EC1x: 318 ng sulfentrazone/g of dry weight soil) and EC100x (concentration 100 times higher than in EC1x)...
October 2018: Environmental Science and Pollution Research International
https://read.qxmd.com/read/29898110/effect-of-herbicides-in-the-oxidative-stress-in-crop-winter-species
#28
JOURNAL ARTICLE
Carla Alves, Eduarda Costa, Jessica R Sofiatti, Cesar T Forte, Fábio L Winter, Cinthia M Holz, Rosilene R Kaizer, Leandro Galon
Most herbicides applied in crop field, stay in the soil for a period, affecting next crop or even the plants using as green manure. Nowadays, the use of herbicides grow to increase productivity, mainly in the grain producing region north of Rio Grande do Sul state. The objective of this study was to evaluate the effects of herbicides fomesafen and sulfentrazone on antioxidant system in Avena sativa1, Vicia sativa2, Raphanus sativus and Lupinus albus. The plants were exposed to varying concentrations of fomesafen3 (0, 0...
April 2018: Anais da Academia Brasileira de Ciências
https://read.qxmd.com/read/29188326/bioavailability-of-metsulfuron-and-sulfentrazone-herbicides-in-soil-as-affected-by-amendment-with-two-contrasting-willow-biochars
#29
JOURNAL ARTICLE
Anna M Szmigielski, Ryan D Hangs, Jeff J Schoenau
This study investigated the effect of two willow (Salix spp.) biochars, produced using either fast- or slow-pyrolysis, on the bioavailability of metsulfuron and sulfentrazone herbicides in soil. Five rates (0%, 1%, 2%, 3%, and 4%; w/w) of each biochar were used, along with varying rates of metsulfuron (0-3.2 µg ai kg-1 ) and sulfentrazone (0-200 µg ai kg-1 ), followed by a sugar beet bioassay. The fast-pyrolysis biochar had minimal effect, while the slow-pyrolysis biochar decreased the bioavailability of both herbicides...
February 2018: Bulletin of Environmental Contamination and Toxicology
https://read.qxmd.com/read/28689076/near-near-infrared-thermal-lens-spectroscopy-to-assess-overtones-and-combination-bands-of-sulfentrazone-pesticide
#30
JOURNAL ARTICLE
M Ventura, J R Silva, L H C Andrade, R P Scorza Júnior, S M Lima
Thermal lens spectroscopy (TLS) in the near-near-infrared region was used to explore the absorptions of overtones and combination bands of sulfentrazone (SFZ) herbicide diluted in methanol. This spectroscopic region was chosen in order to guarantee that only thermal lens effect is noted during the experimental procedure. The results showed that it was possible to detect very low concentrations (~2ng/μL) of SFZ in methanol by determining its thermal diffusivity or the absorption coefficient due to the 3ν(NH)+1δ(CH) combination band...
January 5, 2018: Spectrochimica Acta. Part A, Molecular and Biomolecular Spectroscopy
https://read.qxmd.com/read/28457947/influence-of-temperature-on-the-antioxidant-responses-and-lipid-peroxidation-of-two-species-of-tadpoles-rhinella-schneideri-and-physalaemus-nattereri-exposed-to-the-herbicide-sulfentrazone-boral-500sc%C3%A2
#31
JOURNAL ARTICLE
Juliane Silberschmidt Freitas, Fabrício Barreto Teresa, Eduardo Alves de Almeida
Amphibians can experience large temperature fluctuations in their habitats, especially during the larval stage, when tadpoles are restricted to small and ephemeral ponds. Changes in water temperature can alter development, metabolism and behaviour of cold-blooded animals but also the toxicokinetics of chemicals in the environment. In Brazil, pesticides application is intensified during the rainy season, which is the period of reproduction for many amphibian species. We evaluated here the influence of temperature (28, 32, and 36°C) on the toxicity of the herbicide sulfentrazone (Boral®SC) in tadpoles of Physalaemus nattereri and Rhinella schneideri, by analysis of oxidative stress biomarkers...
July 2017: Comparative Biochemistry and Physiology. Toxicology & Pharmacology: CBP
https://read.qxmd.com/read/27820678/isolation-and-characteristics-of-sulfentrazone-degrading-bacteria
#32
JOURNAL ARTICLE
Christiane A D Melo, André M Massenssini, Ana Beatriz R J Passos, Felipe P Carvalho, Lino R Ferreira, Antonio Alberto Silva, Maurício D Costa
This study aimed to isolate and characterize bacteria able to use sulfentrazone in the commercial formulation as their sole carbon source. The isolation of the potential sulfentrazone-degrading bacteria was made from soil samples with a recent history of herbicide application and from isolates identified through rDNA sequencing. Subsequently, we assessed the growth of the isolates and their sulfentrazone degradation ability using high-performance liquid chromatography. Twenty-six potential sulfentrazone-degrading bacterial isolates were obtained in pure culture...
February 2017: Journal of Environmental Science and Health. Part. B, Pesticides, Food Contaminants, and Agricultural Wastes
https://read.qxmd.com/read/27779324/fate-and-risk-of-atrazine-and-sulfentrazone-to-nontarget-species-at-an-agriculture-site
#33
JOURNAL ARTICLE
Jordan L Thorngren, Amanda D Harwood, Tracye M Murphy, Kara E Huff Hartz, Courtney Y Fung, Michael J Lydy
The present study evaluated the risk associated with the application and co-occurrence of 2 herbicides, atrazine and sulfentrazone, applied to a 32-ha corn and soybean rotational field. Field concentrations of the compounds were measured in soil, runoff water, and groundwater, with peak mean atrazine and sulfentrazone concentrations found in the soil (144 ng/g dry wt, and 318 ng/g dry wt, respectively). Individual and mixture laboratory bioassays were conducted to determine the effects of atrazine and sulfentrazone on the survival of Daphnia magna and Pimephales promelas, the germination of Lactuca sativa, and the growth of Pseudokirchneriella subcapita and Lemna minor...
May 2017: Environmental Toxicology and Chemistry
https://read.qxmd.com/read/26865479/reduced-sulfentrazone-phytotoxicity-through-increased-adsorption-and-anionic-species-in-biochar-amended-soils
#34
JOURNAL ARTICLE
Kailin Liu, Bingqi Yu, Kun Luo, Xiangying Liu, Lianyang Bai
Burning straw in the field is a common agricultural practice. The effects of adding biochar derived from rice straw to soils on the phytotoxicity of sulfentrazone to Oryza sativa L. were observed. Overall, when 1 % biochar was added to three different soils, the phytotoxicity of sulfentrazone to O. sativa L. decreased, and the concentration that inhibits growth by 50 % (IC50) increased by 1.4 to 7.6 times. To illuminate the influencing mechanisms, the changes in sulfentrazone adsorption to the soil, the soil pH, and the bioavailable sulfentrazone extracted from the soil solution using hollow fiber-based liquid-phase microextraction were studied...
May 2016: Environmental Science and Pollution Research International
https://read.qxmd.com/read/26802513/sulfentrazone-dechlorination-by-iron-nickel-bimetallic-nanoparticles
#35
JOURNAL ARTICLE
Mayra A Nascimento, Renata P Lopes, Jean C Cruz, Antônio A Silva, Claudio F Lima
The sulfentrazone dechlorination using bimetallic nanoparticles of Fe/Ni was studied. Different variables that could influence the sulfentrazone conversion were investigated, such as nitrogen atmosphere, pH and dosage of the nanoparticles and initial concentration of sulfentrazone. The best results were obtained using controlled pH (pH 4.0) and 1.0 g L(-1) of nanomaterials, resulting in 100 % conversion in only 30 min. Kinetic studies were also conducted, evaluating the influence of different nanoparticle dosages (1...
April 2016: Environmental Pollution
https://read.qxmd.com/read/26728549/synthesis-herbicidal-activity-and-qsar-of-novel-n-benzothiazolyl-pyrimidine-2-4-diones-as-protoporphyrinogen-oxidase-inhibitors
#36
JOURNAL ARTICLE
Yang Zuo, Qiongyou Wu, Sun-Wen Su, Cong-Wei Niu, Zhen Xi, Guang-Fu Yang
Protoporphyrinogen oxidase (PPO, E.C. 1.3.3.4) is known as a key action target for several structurally diverse herbicides. As a continuation of our research work on the development of new PPO-inhibiting herbicides, a series of novel 3-(2'-halo-5'-substituted-benzothiazol-1'-yl)-1-methyl-6-(trifluoromethyl)pyrimidine-2,4-diones 9 were designed and synthesized. The bioassay results indicated that a number of the newly synthesized compounds exhibited higher inhibition activity against tobacco PPO (mtPPO) than the controls, saflufenacil and sulfentrazone...
January 27, 2016: Journal of Agricultural and Food Chemistry
https://read.qxmd.com/read/26386773/induction-of-mitotic-and-chromosomal-abnormalities-on-allium-cepa-cells-by-pesticides-imidacloprid-and-sulfentrazone-and-the-mixture-of-them
#37
JOURNAL ARTICLE
Jaqueline Bianchi, Thais Cristina Casimiro Fernandes, Maria Aparecida Marin-Morales
To evaluate the cytotoxic and genotoxic effects of low concentrations of pesticides in non-target organisms, seeds of Allium cepa were exposed for 24 h to the imidacloprid insecticide, sulfentrazone herbicide and to the mixture of them, followed by recovery periods of 48 and 72 h. Imidacloprid results indicated an indirect genotoxic effect by inducing different types of chromosome aberration (CA), mainly bridges and chromosomal adherences. Cells with micronucleus (MN) were not significant in the analyzed meristems...
February 2016: Chemosphere
https://read.qxmd.com/read/26074310/toxicogenetic-effects-of-low-concentrations-of-the-pesticides-imidacloprid-and-sulfentrazone-individually-and-in-combination-in-in-vitro-tests-with-hepg2-cells-and-salmonella-typhimurium
#38
JOURNAL ARTICLE
Jaqueline Bianchi, Diogo Cavalcanti Cabral-de-Mello, Maria Aparecida Marin-Morales
The insecticide imidacloprid and the herbicide sulfentrazone are two different classes of pesticides that are used for pest control in sugarcane agriculture. To evaluate the genotoxic potential of low concentrations of these two pesticides alone and in mixture, the comet assay and the micronucleus (MN) test employing fluorescence in situ hybridization (FISH) with a centromeric probe were applied in human hepatoma cell lines (HepG2), in a 24-h assay. Mutagenicity was assessed by Salmonella/microsome assay with TA98 and TA100 strains in the absence and presence of an exogenous metabolizing system (S9)...
October 2015: Ecotoxicology and Environmental Safety
https://read.qxmd.com/read/25072201/the-validation-of-an-analytical-method-for-sulfentrazone-residue-determination-in-soil-using-liquid-chromatography-and-a-comparison-of-chromatographic-sensitivity-to-millet-as-a-bioindicator-species
#39
JOURNAL ARTICLE
Marcelo Antonio de Oliveira, Fábio Ribeiro Pires, Mariana Ferraço, Alessandra Ferreira Belo
Commonly used herbicides, such as sulfentrazone, pose the risk of soil contamination due to their persistence, bioaccumulation and toxicity. Phytoremediation by green manure species has been tested using biomarkers, but analytical data are now required to confirm the extraction of sulfentrazone from soil. Thus, the present work was carried out to analyze sulfentrazone residues in soil based on liquid chromatography with a comparison of these values to the sensitivity of the bioindicator Pennisetum glaucum. The soil samples were obtained after cultivation of Crotalaria juncea and Canavalia ensiformis at four seeding densities and with three doses of sulfentrazone...
July 28, 2014: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://read.qxmd.com/read/24923624/a-quick-easy-cheap-effective-rugged-and-safe-method-for-the-simultaneous-detection-of-four-triazolone-herbicides-in-cereals-combined-with-ultrahigh-performance-liquid-chromatography-with-tandem-mass-spectrometry
#40
JOURNAL ARTICLE
Yan Tao, Jun Xu, Xingang Liu, Youpu Cheng, Na Liu, Zenglong Chen, Fengshou Dong, Yonguan Zheng
This paper describes a novel, rapid, and sensitive analytical method for monitoring four triazolone herbicides in cereals (wheat, rice, corn, and soybean), using a quick, easy, cheap, effective, rugged, and safe sample extraction procedure followed by ultrahigh performance liquid chromatography coupled with tandem mass spectrometry. The four triazolone herbicides (amicarbazone, carfentrazone-ethyl, sulfentrazone, and thiencarbazone-methyl) were extracted using acidified acetonitrile (containing 1% v/v formic acid) and subsequently purified with octadecylsilane (C18 ) prior to sample analysis...
September 2014: Journal of Separation Science
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