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Dissipation pattern of azoxystrobin and difenoconazole in red dragon fruit(Hylocereus polyrhizus)cultivated in Indonesian highland(West Java)and coastal area(***)and its implication for dietary risk assessment

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Food Quality and Safety 2019年第2期3卷 99-106页

作者： Sri Noegrohati Sri Sulasmi Elan Hernadi Syanti Asviastuti Post Graduate Program Faculty of PharmacyGadjah Mada UniversitySekip UtaraYogyakarta 55281Indonesia Directorate of Quality and Standardization D.G.of Processing and Marketing for Agric.ProductsMinistry of AgricultureKantor Pusat Kementerian PertanianGedung D Lantai 3Jl.Harsono RM.No.3RagunanJakarta SelatanIndonesia Plant Product Quality Testing Center Directorate of Food CropsMinistry of AgricultureJl.AUP PasarMingguKotakPos 236/Jks.PSMJakarta Selatan 12520Indonesia

Background:Cultivation of red dragon fruit(Hylocereus polyrhizus)in Indonesian orchards is hampered by anthracnose and stem canker.A mixture of azoxystrobin 200 g/L+difenoconazole 125 g/L is recommended in supporting the obligated integrated pest *** the consumer safety,dietary intake of the residues from fresh edible part should be assessed;therefore,information on correct dissipation pattern of the applied pesticide is *** and Methods:Field residue trials in Indonesian highland(West Java)and coastal area(Special Region of Yogyakarta)were done at recommended dose was 0.151 kg ai/ha azoxystrobin and 0.094 kg ai/ha difenoconazole,three times at 10 days *** fruit samples were collected at 70%-100%ripeness at−1,0,1,3,7,10,and 14 days after last application,processed and determined its residue as soon as *** and Discussion:Photoisomerization of azoxystrobin was observed at Day 0,especially in coastal area;however,it has been dissipated to below lowest validated level in the following *** Day 0,3%-5%of the deposited azoxystrobin and difenoconazole penetrate into the flesh;however,most residues(95%-97%)were retained in peel,and dissipated in prolonged *** dissipation pattern was *** dissipation data were better fit with bi-exponential double-first-order in parallel than single first-order kinetics *** DT50 of both azoxystrobin and difenoconazole was 3 *** harvest time,seventh day,only azoxystrobin residue was detected in flesh at 0.006 mg/kg;therefore,the long-term dietary risk was 0 per cent acceptable daily ***:Fresh red dragon fruit is safe to consume.

关键词： azoxystrobin difenoconazole red dragon fruit dissipation dietary risk

Validation of a SPME-GC Method for azoxystrobin and Pyraclostrobin in Blueberries, and Their Degradation Kinetics

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Agricultural Sciences 2014年第11期5卷 964-974页

作者： Martín S. Munitz Silvia L. Resnik María I. T. Montti Silvia Visciglio Facultad de Ciencias de la Alimentación Universidad Nacional de Entre Ríos Concordia Argentina Agencia Nacional de Promoción Científica y Tecnológica Buenos Aires Argentina Departamentos de Química Orgánica e Industrias Facultad de Ciencias Exactas y Naturales Universidad de Buenos Aires Buenos Aires Argentina Comisión de Investigaciones Científicas de la Provincia de Buenos Aires La Plata Argentina

Analytical method for the residues of strobilurins azoxystrobin and pyraclostrobin in blueberries was developed. Fungicide residues were determined by solid-phase microextraction (SPME) cou-pled to gas chromatography with micro-electron capture detector. The effect of pH values and fiber coatings were studied. The SPME fiber coating selected was 100 μm PDMS. The method is selective with adequate precision and high accuracy and sensitivity. Recoveries ranged within the 100% - 106% range for azoxystrobin, and 96% - 106% range for pyraclostrobin;and detection and quantification limits were 2.0 and 6.0 μg/kg for azoxystrobin, and 26.0 and 86.0 μg/kg for py-raclostrobin, respectively. Statistical parameters indicated the occurrence of matrix effect;con-sequently calibration was performed on spiked samples. Degradation of azoxystrobin and pyra-clostrobin was studied in blueberry fields located in Concordia, Argentina, with fruits from Emerald and Jewel varieties. The degradation of these fungicides in both blueberry varieties studied followed a first order rate kinetics, and the half-life for azoxystrobin was 11.6 and 17.8 days for Emerald and Jewel cultivars;and for pyraclostrobin was 5.5 and 8.0 days, respectively.

关键词： Blueberries azoxystrobin Pyraclostrobin Degradation Kinetics SPME/GC

Evolution of Dimethomorph and azoxystrobin Fungicides Resistance in Potato Pathogen Phytophthora infestans

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Evolution of Dimethomorph and Azoxystrobin Fungicides Resist...

Isolation and characterization of a azoxystrobin-degrading bacterial strain Ochrobactrum anthropi SH14

中国植物病理学会2017年学术年会

作者： Waheed Abdul Shen Linlin Zou Wenchao Xie Jiahui Wang Tian Zhan Jiasui Institute of Plant Virology Fujian Agriculture and Forestry University/Key Laboratory of Plant Virology of Fujian Province

Fungicide resistance is very important problem currently in agriculture ***-vitro research was conducted for the evolution of fungicide resistance to Phytophthora *** fungicides dimethomorph and azoxystrobin were used for training of two different genotypes of isolates for evolutionary *** the ECs for both fungicides,50%inhibition zone of dimethmorph and azoxystrobin fungicides were 0.lμg/mL and 0.2μg/mL *** measured the 50%inhibition zone,different concentrations of fungicides amended in rye agar media for growth of *** of pathogen started from wild types parental *** One year passage of original parental and mutant isolates from low concentration of fungicides to high *** isolates directly transferred to every concentration of fungicides but mutant isolates continuously *** suppressed the growth of Parental isolates at 0.9μg/mL of azoxystrobin and 1μg/mL of dimethmorph but mutant isolates still grown uptol.5μg/mL of both fungicides,its mean adaption of pathogen to fungicides due to continuously using of fungicides on same *** test was done by selection of 3 concentrations for each fungicide for all mutant and parental *** all the mutant and parental isolates were sensitive to selective concentrations of *** was no evidence of pathogen resistance to both fungicides on the base of phenotypic growth.

关键词： Phytophthora infestans Dimethomorph azoxystrobin Evolution Resistant

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Isolation and characterization of a azoxystrobin-degrading b...

英国允许嘧菌酯（azoxystrobin）在豆类作物上应用

中国植物病理学会第十二届青年学术研讨会

作者： Shaohua Chen Yinyue Deng Fei He Lianhui Zhang Guangdong Province Key Laboratory of Microbial Signals and Disease Control South China Agricultural University Institute of Molecular and Cell Biology Agency for ScienceTechnology and Research(A*STAR) Department of Biological Sciences National University of Singapore

Continuous use of the strobilurin fungicide azoxystrobin(AZX) has resulted in serious environmental contamination *** report here that a novel bacterial strain SH14,which was isolated from wastewater treatment system using an enrichment culture technique,was able to degrade and utilize AZX as the carbon and nitrogen source in minimal *** on the morphology,physio-biochemical characteristics,16 S rDNA gene analysis,and API 20 NE systems,strain SH14 was identified as Ochrobactrum *** SH14 degraded 86.3%of 50 mgL

关键词： azoxystrobin Ochrobactrum anthropi biodegradation kinetics

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新农药 2003年第2期7卷 24-24页

作者：邓金保

杀菌剂azoxystrobin获美环保局登记

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精细化工中间体 1999年第4期 48-48页

作者：邓金保

Electrocatalytic degradation of pesticide micropollutants in water by high energy pulse magnetron sputtered Pt/Ti anode

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Chinese Chemical Letters 2022年第12期33卷 5196-5199页

作者： Yuxin Zeng Siyao Zhang Lifeng Yin Yunrong Dai School of Environment Beijing Normal UniversityBeijing 100875China School of Water Resources and Environment China University of Geosciences(Beijing)Beijing 100083China

The increasing occurrence of pesticide micropollutants highlights the need for innovative water treatment technologies,particularly for small-community and household ***-oxidation is being widely studied in this area,unfortunately,safe,stable and efficient electrocatalytic anodes without released heavy metal ions are still highly *** this study,we fabricated a Pt/Ti anode by high energy pulse magnetron sputtering(HiPIMS-PtTi)which was used to decompose dichlorvos(DDVP)and azoxystrobin(AZX)in *** results show that the reaction rate constant(kENR)on HIPIMS was 35.7 min-1(DDVP)and 41.3 min-1(AZX),respectively,superior to electroplating Pt/Ti anode(EP-PtTi).The identification of radicals(^(·)OH,^(1)O_(2),^(·)O_(2)-)and micro-area analyses evidenced that Pt atoms were embedded into the TiO_(2) lattice on the surface of Ti plate by high-energy ions,which resulted in more adsorbed hydroxyls,and higher production of·OH under polarization ***,the electro-oxidation intermediates of DDVP and AZX were identified and the degradation pathways were speculated:(1)indirect oxidation dominated by·OH attack,and(2)direct electron transfer reaction of pesticides on the anode *** cooperated reactions achieve the complete degradation and highly efficient mineralization of DDVP and AZX.

关键词： Electrocatalysis Magnetron sputtering Pesticide Degradation mechanism Dichlorvos azoxystrobin

Field Control Efficacy of Several Reagents against Northern Leaf Blight of Maize(Exserohilum turcicum)

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Plant Diseases and Pests 2018年第2期9卷 14-15页

作者： Sha Honglin Chi Chang Ma Wei Agricultural Resources and Environment Research Institute Jilin Academy of Agricultural Sciences

[Objective] The paper was to screen suitable agents for controlling northern leaf blight of maize in field. [Method] Field efficacy test was conducted using the agents of propiconazole, azoxystrobin, propiconazole·azoxystrobin, coumoxystrobin·tebuconazole, coumoxystrobin·tebuconazole and azoxystrobin. [Result] At 14 d post secondary spraying, the control effects of 25% propionazole EC 168.8 g/hm^2, 25% azoxystrobin SC 300 g/hm^2, 18.7% propiconazole·azoxystrobin SC 196.4 g/hm^2, 40% coumoxystrobin·tebuconazole SC 180 m L/hm^2, 40% coumoxystrobin·tebuconazole SC 180 m L/hm^2＋ 25% azoxystrobin SC 300 g/hm^2 against northern leaf blight of maize were 77.35%, 77.11%, 78.13%, 74.60% and 80.94%, re-spectively. The agents were safe and harmless to maize. [Conclusion] Considering the production factors, 18.7% propiconazole·azoxystrobin SC196.4 g/hm^2 or 40% coumoxystrobin·tebuconazole SC 180 m L/hm^2＋ 25% azoxystrobin SC 300 g/hm^2 can be sprayed in production before the incidence or in the initial incidence of northern leaf blight of maize.

关键词： Propieonazole azoxystrobin Propieonazole-azoxystrobin Coumoxystrobin- tebueonazole Northern leaf blight of maize Control

Alleviation of Pesticide Residue in Surface Water

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Journal of Water Resource and Protection 2017年第5期9卷 523-535页

作者： Olubode Adeniyi Amy Hernandez Mark LeBlanc Joan M. King Marlene Janes Agricultural Chemistry Department Ag Center Louisiana State University Baton Rouge Louisiana USA Pesticide Unit Louisiana State Department of Agriculture and Forestry Baton Rouge Louisiana USA School of Nutrition and Food Science Ag Center Louisiana State University Baton Rouge Louisiana USA

Reduction of environmental pollution incurred from pesticide use is very important. Zeolite is a natural mineral capable of removing certain chemical contaminants from water. This study was carried out to test the effect of zeolite treatment on pesticide residue alleviation in surface water. Ten surface water samples were treated with natural zeolite by filtering through. An EPA method was used to extract pesticide residue from the water samples and the surfactant used to modify the net charge on the zeolite was hexadecyltrimethylammonium chloride (HDTMA-Cl). Gas chromatography-mass spectrometry was used to analyze water samples. Alleviation was achieved in all the 10 water samples that were filtered through zeolite. The highest removal of pesticides from water with zeolite included 100% of bifenthrin in sample CLC, atrazine in BPH, CDG and LBT;metolachlor in CLC, LBT, BCH, TRH2 and BPI;acetolachlor in BBH and BCH;azoxystrobin in BBH;desethylatrazine in BCH and BPI;metribuzin in BCH, TRH2 and BPI;and both clomazone and bromacil in sample BDC. A minimum reduction of 10.9% was found for metolachlor in sample BRH. Further reduction of pesticide residues up to 50% was recorded in the SMZ treatment as the concentrations of 4 out of 8 pesticide residues were reduced. This study confirms the potential of both the natural zeolite-Clinoptilolite, and SMZ of alleviating pesticide residues in water.

关键词： EPA (United States Environmental Protection Agency) Gas Chromatography Mass Spectrometry Zeolite Hexadecyltrimethylammonium Chloride (HDTMA-Cl) Surface-Modified-Zeolite (SMZ) Bifenthrin Metolachlor Metribuzin Acetolachlor azoxystrobin Desethylatrazine Clomazone Bromacil Atrazine Clinoptilolite Alleviation