Pesticide residues

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Mon, 05/17/2021 - 00:00
Bacillus thuringiensis (Bt), a natural pathogen of different invertebrates, primarily insects, is widely used as a biological control agent. While Bt-based preparations are claimed to be safe for non-target organisms due to the immense host specificity of the bacterium, the growing evidence witnesses the distant consequences of their application for natural communities. For instance, upon...
Fri, 05/14/2021 - 02:03
In this study, a multi-component analytical method for the detection of pesticide residues in paprika by ultra-high-performance liquid chromatography coupled with quadrupole time-of-flight mass spectrometry (UHPLC-Q-TOF/MS) was developed and validated. The sample preparation is based on an extraction step with acetonitrile followed by a cleanup step using dispersive solid-phase extraction. Mass...
Thu, 05/13/2021 - 16:00
The impact of two pesticides (S-metolachlor and propiconazole) and their respective main metabolites (ESA-metolachlor and 1,2,4-triazole) on bacterial denitrification in groundwater was studied. For this, the denitrification activity and the bacterial diversity of a microbial community sampled from a nitrate-contaminated groundwater were monitored during 20 days in lab experiments in the presence...
Wed, 05/12/2021 - 10:02
Strobilurin fungicides are widely used in agricultural production due to their broad-spectrum and fungal mitochondrial inhibitory activities. However, their massive application has restrained the growth of eukaryotic algae and increased collateral damage in freshwater systems, notably harmful cyanobacterial blooms (HCBs). In this study, a strobilurin fungicide-degrading strain, Hyphomicrobium sp...
Wed, 05/12/2021 - 02:03
This study was designed to determine the occurrence, potential sources, human and ecological risks of organochlorine pesticides (OCPs) in soil from Wuhan, central China. The soil samples were collected from twenty-six sites at soil depth of 1–20 cm from three land-use types and analyzed for the presence of eight OCPs. The instrumental analysis was carried out using Gas Chromatography-Electron...
Sat, 05/08/2021 - 02:02
The application of plant growth-promoting bacteria in agricultural systems is an efficient and environment-friendly strategy to improve crop yields and maintain soil quality. However, as different soils have diverse and specific ecological characteristics and may represent adverse abiotic conditions, in vivo application requires the careful selection of the desired beneficial microorganisms. In...
Fri, 05/07/2021 - 06:09
Author(s): Christina I. Kosma, Ourania L. Koloka, Triantafyllos A. Albanis, Ioannis K. Konstantinou In this research, a quick, easy, cheap, effective, rugged, and safe (QuEChERS) extraction procedure and Ultra-High Performance Liquid Chromatography-Orbitrap-Mass Spectrometry (UHPLC-Orbitrap-MS), were combined to obtain a sensitive and rapid method for the determination of multiclass pesticides in...
Fri, 05/07/2021 - 04:02
Edible insects are a novel food in most countries; their popularity is growing because of their high protein/low fat content, ease of cultivation, and small environmental impact. To our knowledge, this is the first report that addresses both microbiological and chemical hazards in edible insects. Samples were collected from retail stores or purchase through e-commerce. A total of 51 samples of...
Wed, 05/05/2021 - 02:03
Agricultural drainage ditches help remove excess water from fields and provide habitat for wildlife. Drainage ditch management, which includes various forms of vegetation clearing and sediment dredging, can variably affect the ecological function of these systems. To determine whether ditch conditions following dredging/vegetation clearing management affected the survival, growth, and development...
Fri, 04/30/2021 - 06:09
Author(s): Xiaohuan Zang, Qingyun Chang, Yachao Pang, Ling Wang, Shuaihua Zhang, Chun Wang, Zhi Wang A boron nitride modified multiwalled carbon nanotube material (BN@MWCNTs) was synthesized, and the synthesis conditions were optimized. The BN@MWCNTs was then used as the SPME fiber coating adsorbent for the extraction of eleven organochlorine pesticides (OCPs) from fruit and vegetable samples....
Fri, 04/30/2021 - 06:09
Author(s): Aijuan Bai, Shaowen Liu, Ang Chen, Wuying Chen, Xiangwen Luo, Yong Liu, Deyong Zhang The fate of eighteen pesticides in field-collected rice samples during Chinese Baijiu production was systematically studied. The results indicated that steeping decreased flonicamid residue by 73.2% due to its high water-solubility and low octanol/water partition coefficient. The steaming step reduced...
Thu, 04/29/2021 - 12:06
Author(s): Maria Constantinou, Despo Louca-Christodoulou, Agapios Agapiou A multi-residue method for the simultaneous analysis of a wide range of pesticides in raisins using liquid and gas chromatography-tandem mass spectrometry (LC-MS/MS and GC-MS/MS) has been validated. Pesticides are extracted from raisins with ethyl acetate, followed by centrifugation. The validation study was in accordance...
Wed, 04/28/2021 - 12:00
Epitranscriptomics, the study of chemically modified RNAs, is a burgeoning field being explored in a variety of scientific disciplines. Of the currently known epitranscriptomic modifications, N6-methyladenosine (m6A) methylation is the most abundant. The m6A modification is predominantly regulated by 3 tiers of protein modulators classified as writers, erasers, and readers. Depending upon...
Wed, 04/28/2021 - 06:09
Author(s): Saida Belarbi, Martin Vivier, Wafa Zaghouani, Aude De Sloovere, Valérie Agasse-Peulon, Pascal Cardinael Performances of multiresidue analysis of one hundred of pesticides and contaminants, using GC-Q-Orbitrap method in full scan mode were compared to those obtained with GC-triple-quadrupole method in multiple reaction monitoring mode. In terms of sensitivity, 86% of molecules exhibited...
Mon, 04/26/2021 - 02:02
The use of ozone as a tool in the storage of some horticultural produces is recommended for all steps from harvest to consumption. However, little is known about its effects on the removal of pesticides and postharvest physiology of fresh peppers. In the present study, the effects of ozone treatment on the removal of pesticides, storage life and quality of green peppers were investigated....
Sat, 04/24/2021 - 06:13
LWT
Author(s): Changjian Li, Jian Ju, Yunfei Xie, Hang Yu, Yahui Guo, Weirong Yao, He Qian In industry, Polygalacturonase (PG) is typically used for enzymatic hydrolysis of fruit juice to increase the yield. In the present study, it was found that two pesticides, namely trichlorfon and carbosulfan, which are frequently applied to fruit trees, inhibited the activity of PG and reduced the yield of...
Sat, 04/17/2021 - 06:24
Author(s): Guijie Li, Xu Zhang, Tingting Liu, Hongxiu Fan, Hongcheng Liu, Shangyu Li, Dawei Wang, Lan Ding A convenient, cost-effective and fast method using dynamic microwave-assisted extraction and liquid phase microextraction based on the solidification of a floating drop was proposed to analyze organochlorine pesticides in grains including rice, maize and millet. Twelve samples can be...
Sat, 04/17/2021 - 04:03
Plant bacterial diseases can potentially damage agricultural products around the world, and few effective bactericides can manage these infections. Herein, to sequentially explore highly effective antibacterial alternatives, 1,2,3-triazole-tailored carbazoles were rationally fabricated. These compounds could suppress the growth of three main intractable pathogens including Xanthomonas oryzae pv...
Fri, 04/16/2021 - 18:03
The organochlorine insecticide dichlorodiphenyltrichloroethane (DDT) and heavy metal cadmium (Cd) are widespread environmental pollutants. They are persistent in the environment and can accumulate in organisms. Although the individual toxicity of DDT and Cd has been well documented, their combined toxicity is still not clear. Since liver is their common target, in this study, the individual and...
Fri, 04/16/2021 - 02:02
Abstract The concentration levels of some important pesticides were evaluated in soil samples from different areas of the North of Iran (Golestan province) and to indicate the possible sources and risks of contamination. A multiresidue analytical procedure using the QuEChERS approach was developed to extract and measure 12 pesticide residues from ten different classes in 145 soil samples...
Wed, 04/14/2021 - 04:03
A multiclass analytical method to determine pesticides and mycotoxins in beer-related matrices based on the dilute and shoot approach was optimized and validated according to the European guidelines SANTE/12682/2019 and EC/401/2006. Extraction used acidified acetonitrile at 1% (v/v) acetic acid, followed by horizontal shaking homogenization, centrifugation, freeze-out step for cleanup, another...
Wed, 04/14/2021 - 02:02
Injudicious and ever-increasing use of pesticides has made consumers more aware and critical about quality control and quality assurance in fruits and vegetables. Presence of pesticide residues in food commodities is one of the most indispensable parameters in quality control and quality assurance. To meet out the demand of acceptable or no residues in crops, different agencies viz. Codex...
Mon, 04/12/2021 - 02:02
Abstract Industrialisation, directly or indirectly, exposes humans to various xenobiotics. The increased magnitude of chemical pesticides and toxic heavy metals in the environment, as well as their intrusion into the food chain, seriously threatens human health. Therefore, the surveillance of xenobiotics is crucial for social safety and security. Online investigation by traditional methods is...
Sun, 04/04/2021 - 02:02
One hundred and twenty samples of breast milk were collected from five northern governorates and districts in Jordan in 2019 and 2020 to monitor results for organochlorine pesticides as organic contaminants. The results showed that 36 samples (30%) of total 120 analyzed samples were contaminated as follows: 16 samples (13.3%) were contaminated with dieldrin, 4 samples (3.3%) with p,p′-DDE, 4...
Sat, 04/03/2021 - 06:18
Author(s): Vahideh Mahdavi, Arnavaz Keikavousi Behbahan, Gholamreza Golmohammadi, Behrouz Tajdar, Zahra Eslami, Amin Mousavi Khaneghah Saffron is a strategic agricultural product having extensive flavoring applications in Asia. Although utilization of pesticides for its cultivation is limited, there is a possible risk of contamination in this prominent spice. Herein, 88 pesticides were analyzed...
Fri, 04/02/2021 - 06:09
Author(s): Philipp Eyring, Marc Tienstra, Hans Mol, Susan Strange Herrmann, Peter Have Rasmussen, Henrik Lauritz Frandsen, Mette Erecius Poulsen Various generic extraction methods have been used to determine pesticide residues, mycotoxins, and polycyclic aromatic hydrocarbons (PAHs) in food and animal feed to ensure consumer safety. However, these methods cannot extract all relevant compounds at...
Sat, 03/27/2021 - 22:09
Journal of Separation Science, Accepted Article. Pesticides and veterinary drugs are generally employed to control pests and insects in crop and livestock farming. However, remaining residues are considered potentially hazardous to human health and the environment. Therefore, regular monitoring is required for assessing and legislation of pesticides and veterinary drugs. Various approaches to...
Thu, 03/25/2021 - 00:00
Bacillus cytotoxicus belongs to the Bacillus cereus group that also comprises the foodborne pathogen Bacillus cereus sensu stricto, Bacillus anthracis causing anthrax, as well as the biopesticide Bacillus thuringiensis. The first B. cytotoxicus was isolated in the context of a severe food poisoning outbreak leading to fatal cases of diarrheal disease. Subsequent characterization of the outbreak...
Wed, 03/24/2021 - 06:10
Author(s): Huijun Li, Jieshan Wu, Chao Chen, Wenfeng Xin, Wensheng Zhang This study established a method for the simultaneous determination of 74 pesticide residues in Panax notoginseng by QuEChERS pretreatment method coupled with GC-MS/MS, and carried out pesticide residue analysis on 20 batches of market samples in China. The samples were extracted with acetonitrile, cleaned up with primary...
Fri, 03/19/2021 - 00:00
Cordyceps fumosorosea, an insect pathogenic fungus, produces different toxins/secondary metabolites which can act as pest control agents. This study reports the extraction and characterization of crude mycelial extracts of C. fumosorosea isolate SP502 along with their bio-efficacy against Bemisia tabaci and Aphis craccivora. Fourier transform infrared spectroscopy, liquid chromatography, mass...
Thu, 03/18/2021 - 16:00
Thailand is an agricultural country. However, agricultural productivity relies on the heavy use of herbicides, especially paraquat. Paraquat accumulation is emerging as a problem in an ever-growing portion of agricultural land. Paraquat residues are toxic to plants, animals, and aquatic organisms in the environment. Biological remediation is a process that can mitigate agricultural chemical...
Thu, 03/18/2021 - 06:13
Author(s): Ljilja Torović, Gorica Vuković, Nina Dimitrov The occurrence of pesticide residues in food and the consequent health risks attract considerable attention. The current study comprised 139 samples of fruit juice present on the Serbian market. Out of 69 pesticide active substances analysed by liquid chromatography tandem mass spectrometry with electrospray ionisation, 19 were detected,...
Sun, 03/14/2021 - 05:02
Oxathiapiprolin is a novel chiral piperidine thiazole isooxazoline fungicide that contains a pair of enantiomers. An effective analytical method was established for the enantioselective detection of oxathiapiprolin in fruit, vegetable, and soil samples using ultraperformance liquid chromatography-tandem triple quadrupole mass spectrometry. The optimal enantioseparation was achieved on a Chiralpak...
Sat, 03/13/2021 - 06:15
Author(s): Changjian Li, Huimin Zhu, Changyan Li, He Qian, Weirong Yao, Yahui Guo Pesticide residues are one of the most important issues affecting food safety. In this review, the general situation of pesticide residues in fruits and vegetables based on the background of the Chinese fruit and vegetable industry is first described. On the basis of primary processing of agricultural products, the...
Sat, 03/13/2021 - 06:14
Author(s): Marjan Koushkestani, Samira Abbasi-Moayed, Forough Ghasemi, Vahideh Mahdavi, M. Reza Hormozi-Nezhad In this work, a colorimetric sensor array has been designed for the identification and discrimination of thiometon (TM) and phosalone (PS) as organophosphate pesticides and prothioconazole (PC) as a triazole pesticide. For this purpose, two different plasmonic nanoparticles including...
Sat, 03/13/2021 - 02:02
As a novel detection method of CuSO4, terahertz (THz) spectroscopy detection has great application prospects, but the terahertz detection with the tablet method has low sensitivity, and with the metamaterials has complicated manufacture. This work has proposed a high-sensitivity pesticide THz spectroscopic detection method with a novel metal grating. The metal grating was composed of a circular...
Fri, 03/12/2021 - 08:04
by Iliana Julieta Cortese, María Lorena Castrillo, Andrea Liliana Onetto, Gustavo Ángel Bich, Pedro Darío Zapata, Margarita Ester Laczeski Plant growth-promoting bacteria (PGPB) are a heterogeneous group of bacteria that can exert beneficial effects on plant growth directly or indirectly by different mechanisms. PGPB-based inoculant formulation has been used to replace chemical fertilizers and...
Thu, 03/11/2021 - 14:04
This study developed an in-field analytical technique for food samples by integrating filtration into a surface-enhanced Raman spectroscopy (SERS) microchip. This microchip embedded a filter membrane in the chip inlet to eliminate interfering particulates and enrich target analytes. The design and geometry of the channel were optimised by finite-elemental method (FEM) to tailor variations of flow...
Wed, 03/10/2021 - 06:10
Author(s): Zahra Sarlak, Kianoush Khosravi-Darani, Milad Rouhi, Farhad Garavand, Reza Mohammadi, Mohammad Reza Sobhiyeh Organophosphorus pesticides (OPPs) are widely used to control agricultural and domestic pests. Exposure to OPP residues poses serious health threats to human health through consumption of contaminated foods and water. Therefore, it is required to remove the OPP residues from...
Wed, 03/10/2021 - 06:09
Author(s): Guozheng Zhao, Binhua Zhou, Xiuwen Wang, Jian Shen, Bo Zhao Based on the successful synthesis of mercaptomethamidophos as a substrate, a novel nanogold/mercaptomethamidophos multi-residue electrochemical biosensor was designed and fabricated by combining nanoscale effect, strong Au−S bonds as well as interaction between acetylcholinesterase (AChE) and mercaptomethamidophos, which can...
Sun, 03/07/2021 - 02:02
Tomato is well-known to be one of the most cultivated and consumed vegetables worldwide and frequently contain pesticide residues. Therefore, a simple multiresidue method was established and validated to determine 129 pesticides and metabolites in tomato samples using a modified acetate QuEChERS without cleanup for sample preparation and determination by ultrahigh-performance liquid...
Sun, 03/07/2021 - 02:02
Sugarcane is a major crop in Brazil as well as other tropical areas. The rise of green cane systems that maintain straw on the soil surface after mechanical harvesting alongside extreme precipitation has changed the use and environmental fate of pesticides, mainly herbicides. The goal of this research was to evaluate the effects of straw amounts (0, 7, and 14 t ha−1), soil water contents (10 and...
Fri, 03/05/2021 - 06:08
Author(s): Stuart Ben Mukiibi, Steven Allan Nyanzi, Justus Kwetegyeka, Chijioke Olisah, Adewale Matthew Taiwo, Edward Mubiru, Emmanuel Tebandeke, Henry Matovu, Silver Odongo, Juma John Moses Abayi, Emily Chelangat Ngeno, Mika Sillanpää, Patrick Ssebugere Honey has multifaceted nutritional and medicinal values; however, its quality is hinged on the floral origin of the nectar. Taking advantage of...
Wed, 03/03/2021 - 22:10
Journal of Separation Science, Accepted Article. The intensive application of pesticides to increase crop production has resulted in contamination of the agricultural products. Due to their occurrence at trace levels and the complexity of food samples, analysis of pesticide residues requires selective and efficient sample preparation methods. For this purpose, an extraction method based on...
Tue, 03/02/2021 - 04:02
Development of simple, sensitive, and reliable fluorescence sensors for monitoring the residue, distribution, and variation of organophosphorus pesticides (OPs) in agricultural crops is highly urgent but remains challenging, which is ascribed to deprivation of an ideal fluorophore and ingenious detection strategy. Herein, we report the fabrication of cadmium telluride quantum dots (CdTe QDs) with...
Tue, 03/02/2021 - 04:02
Nowadays, a lot of pesticides have been used in the agriculture field due to the global demand for food production. Carbofuran (CF) is the most commonly used carbamate compound that is responsible for the highest toxicity to humans compared to any other pesticide used in agricultural settings. Thus, rapid, portable, and low-cost sensors are needed for the detection of CF in the environment and...
Tue, 03/02/2021 - 04:02
Pesticide residues are a food safety concern. A good detection method is critical for rapid and accurate determination of pesticide metabolites in crops and studying metabolism. The pretreatment methods have mainly been ultrasonic extraction–solid-phase extraction and QuEChERS, while detection methods have been radio-chromatography, nuclear magnetic resonance, and mass spectrometry. This...
Mon, 03/01/2021 - 06:09
Author(s): Mehmet Fatih Cengiz, Onur Basançelebi, Mehmet Başlar, Muharrem Certel In this study, effects of low-intensity electrical currents (200, 800 and 1400 mA), ultrasound frequencies (24 and 40 kHz) and their combinations were applied at the duration period of 2, 4, 6, 8, and 10 minutes for the degradation of captan, thiamethoxam and metalaxyl residues in lettuce samples. Residues of the...
Fri, 02/26/2021 - 16:00
Maize is one of the most important crops worldwide and is the number one arable crop in Portugal. A transition from the conventional farming system to organic agriculture requires optimization of cultivars and management, the interaction of plant–soil rhizosphere microbiota being pivotal. The objectives of this study were to unravel the effect of population genotype and farming system on...
Mon, 02/22/2021 - 06:10
Author(s): Xu Pang, Xiuhua Liu, Liangrui Peng, Zhijun Chen, Jing Qiu, Xin Su, Changyuan Yu, Jiguang Zhang, Rui Weng Increasing pesticide contamination in foods of animal origin has made the wide-scope multi-residue analysis of pesticides an international concern. In this study, a sensitive and reliable multi-residue pesticide analysis method for beef was developed with the use of 129 pesticides...

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