Pesticide residues

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Sat, 11/16/2019 - 03:26
In this study, a simple and reliable sample preparation method based on an efficient version of homogeneous liquid-liquid extraction combined with dispersive liquid-liquid microextraction solidification of floating organic drop has been introduced to analyze some pesticide residues in fruit and fruit juice samples with gas chromatography-flame ionization detection. Under the optimum experimental...
Sat, 11/16/2019 - 03:26
Many pesticides are used for pest control during oat production and storage, making necessary to employ multiclass methods for pesticide residue determination. In this work, an efficient QuEChERS method was established for multiresidue determination of 60 pesticides in oats by liquid chromatography with tandem mass spectrometry (LC-MS/MS). Different sorbents, such as chitosan, Forisil®, C18, PSA...
Thu, 11/14/2019 - 03:27
Three types of molecularly imprinted solid phase microextraction fibers were fabricated through sol‐gel method using diazinon, parathion‐methyl and isocarbophos as templates, respectively, and assembled together to construct a multifiber for analysis of organophosphorus pesticides in complex matrices. The multifiber provided large extraction capacity and high imprinting factor up to 3.89. In...
Tue, 11/12/2019 - 03:32
Author(s): Julian R. Golec, Brianna Hoge, James F. WalgenbachAbstractTetranychus urticae Koch management in many specialty crops relies on intensive pesticide use and has led to rapid evolution of acaricide-resistant populations. These concerns, along with public concern regarding conventional pesticide safety, has generated interest in the use of biopesticides for managing T. urticae....
Mon, 11/11/2019 - 03:26
Organochlorine pesticides (OCPs) have been used for many decades, both for the control of pests in agriculture and for the control of vectors of human and animal diseases. Several recent studies have reported significant concentrations of these compounds in multiple environmental substrates due to their persistence, as well as the effect they have on ecosystem health, human health, and wildlife...
Mon, 11/11/2019 - 03:26
The dissipation behaviour and left-over residues of Hexaconazole fungicide and Lambda-Cyhalothrin pesticide in potato plant and soil were analysed by gas chromatography mass spectrometry (GC-MS). At fortified levels of 10, 100 and 500 μg/kg, the recoveries of Lambda-Cyhalothrin and Hexaconazole were in the range 81.66–93.25% and 76.11–93.92% with standard deviations of 0.87–8.13% and 0.88–7.68%,...
Sun, 11/10/2019 - 03:31
Author(s): Le Song, Zezhi Zhong, Yongtao Han, Qinglin Zheng, Yuhong Qin, Qian Wu, Xiaoping He, Canping PanAbstractTwelve commercial pesticide formulations containing sixteen active ingredients were applied on greenhouse strawberries at recommended and double doses. The dynamics and dietary risk analysis were investigated. A modified QuEChERS method based on the use of multi-walled carbon...
Sun, 11/10/2019 - 03:31
Author(s): Huatao Li, Pengfei Zhang, Yong Zhao, Hongfu ZhangAbstractPesticides have been extensively produced and used to help the agricultural production which leads to the contamination of the environment, soil, groundwater sources, and even foodstuffs. Fungicides carbendazim (CBZ) and chlorothalonil (Chl) are widely applied in agriculture and other aspects. CBZ or Chl have been reported to...
Thu, 11/07/2019 - 03:32
Author(s): Yuhang Hong, Hongmei Yin, Yi Huang, Qiang Huang, Xiaozhen YangAbstractIt is known that abamectin (ABM) inflicts oxidative damage on aquatic animals; however, knowledge about the immune response under pesticide-induced oxidative stress is incomplete. In the present study, several cellular and humoral immune parameters, including total haemocyte counts (THC), lysosomal membrane stability...
Thu, 11/07/2019 - 03:32
Author(s): Afaf.Abd El Megid, Mohammad E. Abd Al Fatah, Amel El Asely, Yakout El Senosi, Mahmoud M.A. Moustafa, Mahmoud A.O. DawoodAbstractThis study aimed to assess the levels of pyrethroids and organochlorine residues in the tissues of cultured Mugil capito and in water samples obtained from three different sites (Al-Hamol, Al-Riad and Sidi Salem; referred to as Area 1, Area 2, and Area 3,...
Tue, 11/05/2019 - 03:34
Author(s): Madelaine Venzon, Pedro H.B. Togni, André L. Perez, Juliana M. OliveiraAbstractNeem-based pesticides can be a valuable tool to control the two-spotted spider mite, Tetranychus urticae Koch (Acari: Tetranychidae), in leafy minor crops that lack pest management options and often have pesticide level residues reported. We evaluated the efficacy of three commercially available neem-based...
Sun, 11/03/2019 - 02:34
Author(s): Hélène Licandro, Phu Ha Ho, Thi Kim Chi Nguyen, Awanwee Petchkongkaew, Hai Van Nguyen, Son Chu-Ky, Thi Viet Anh Nguyen, Da Lorn, Yves WachéAbstractFermented Asian foods have recently gained popularity, crossing from Asian communities to mainstream markets, in many western countries. However, less attention has been paid to the safety of these foods. In South-East Asia, fermented...
Sat, 11/02/2019 - 03:27
In this study, a simple and rapid dispersive liquid-liquid microextraction method was established, and the residuals of four isomers of hexachlorocyclohexane and six kinds of pyrethroid pesticides in milk were simultaneously determined by gas chromatography electron capture detector (GC-ECD). The milk sample was first extracted with acetonitrile and cleaned with primary secondary amine (PSA)....
Fri, 11/01/2019 - 03:35
Author(s): Xianli Yang, Zhiyong Zhao, Yanglan Tan, Bo Chen, Changyan Zhou, Aibo WuAbstractThe co-occurrence of food contaminants has caught the public concern worldwide owing to their extensive distribution and the potential risk on human health. In this study, a total of 6471 samples of cereals and cereal-based products was collected from Shanghai between 2008 and 2011. The food contaminants co-...
Fri, 11/01/2019 - 03:32
Author(s): Mengyun Jiang, Wei Zhang, Tingting Zhang, Gang Liang, Bin Hu, Ping Han, Wenwen GongAbstractChrysanthemum (Dendranthema grandiflora) flowers are consumed as a popular, traditional herbal tea worldwide. During tea infusion with hot water pesticide residues in chrysanthemum flowers can be transferred into tea solution, posing potential health risks to consumers. Using greenhouse...
Fri, 11/01/2019 - 03:32
Author(s): Falin He, Shiang Sun, Lifei He, Chao Qin, Xiangdong Li, Jiwang Zhang, Xingyin JiangAbstractHarmonia axyridis is an important predator of several pest species and is part of many Integrated Pest Management (IPM) programs. To assess the risks of pesticide application to H. axyridis, we studied the effects of sulfoxaflor on H. axyridis larvae. At 72 h after treatment, the acute toxicity...
Sun, 10/27/2019 - 03:45
Author(s): Xuejin Mao, Yiqun Wan, Zhanming Li, Lin Chen, Hueylee Lew, Hongshun YangAbstractA simple, sensitive and environmentally-friendly method for determining organophosphorus and pyrethroid pesticides in vegetables was developed to better evaluate the risk of consuming them. The pesticides in vegetables were extracted, purified and concentrated by using the QuEChERS (quick, easy, cheap,...
Fri, 10/25/2019 - 03:44
Author(s): Xue Hou, Xu Xu, Xiaoying Xu, Mei Han, Shiting QiuAbstractA multi-class screening method for the determination of veterinary drugs and pesticides in eggs was developed by high performance liquid chromatography quadrupole-time-of-flight mass spectrometry (HPLC-QTOF-MS). A single-injection workflow was developed for qualitative analysis, and method validation was conducted in terms of...
Tue, 10/22/2019 - 03:33
In this study, an effective speed‐regulated directly suspended droplet microextraction method was developed to condense pesticide residues from teas through dispersive solid‐phase extraction prior to analysis by GC–MS/MS. The extractant was intentionally dispersed into the sample solution in the form of globules through high‐speed agitation. This procedure increases the contact area between the...
Sun, 10/20/2019 - 03:31
Climate change is expected to alter hydrological cycles on global and regional scales, impacting groundwater and surface water inputs to stream habitats. In the midwestern United States, the volume and frequency of inputs are expected to become increasingly variable. This region has a high incidence of agriculture, creating enormous potential for transport of pesticides and herbicides into...
Wed, 10/16/2019 - 03:30
Little is known about the presence and effects of polychlorinated biphenyls (PCBs) and organochlorine pesticides (OCPs) in Puerto Rico’s waters. Four coastal aquatic systems were investigated using low-density polyethylene passive sampling for PCBs and OCPs in water and its overlying air. The highest total freely dissolved and gaseous concentrations of PCBs were found in Guánica Bay, with 4000 pg...
Wed, 10/16/2019 - 03:29
Functional foods provide nutritional and health benefits, yet they could be contaminated with residues like pesticides and polychlorobiphenyls. These residues affect the safety, quality, and consequently the commercial value of functional foods. Therefore, the validity and efficiency of residue determination methods constitute a major analytical concern. Reduction of matrix effect (ME) has always...
Tue, 10/15/2019 - 03:35
Dichlorvos (DDVP) is widely applied in the agricultural industry, and its residues are considered hazardous to the environment. Microbial bioremediation is an innovative technology with the potential to mitigate such pollution. Trichoderma atroviride strain T23, a filamentous fungus, is very efficient at degrading DDVP. Therefore, we used DDVP as a model organophosphate pesticide to study the...
Fri, 10/11/2019 - 03:40
Author(s): Jesus D. Fernandez-Bayo, Emily A. Shea, Amy E. Parr, Yigal Achmon, James J. Stapleton, Jean S. VanderGheynst, Amanda K. Hodson, Christopher W. SimmonsAbstractBiosolarization utilizes organic amendments to produce biopesticide compounds in soil that can work in tandem with other stresses to inactivate agricultural pests. The prospect of using by-products from industrial almond...
Wed, 10/09/2019 - 03:29
In this study, a binary mixture in dispersive liquid-liquid microextraction was used for the preconcentration and determination of selected pesticides, pharmaceutical and hormone by GC–MS. A Box–Behnken experimental design was used to optimize the amounts of binary mixture, dispersive solvent and salt. The optimum parameters obtained were dichloromethane/1,2-dichloroethane binary mixture (200 µL...
Wed, 10/09/2019 - 03:29
To maintain self-sufficiency in rice production and national food security, the Chinese government strongly supports research that aims at increasing the productivity of rice cultivation. Rice with genetic material from Bacillus thuringiensis (Bt rice) is transgenic rice that can reduce lepidopteran pest damage and the use of insecticides. It was developed in the 1990s and earned biosafety...
Mon, 10/07/2019 - 03:31
Molecular imprinted polymers prepared by Pickering emulsion method with lignin as stable particle were used as dispersants in matrix solid phase dispersion, followed by ultra performance liquid chromatography‐tandem mass spectrometry analysis to research the degradation behavior of matrine in soil. The molecular imprinted polymers have regularly morphology and uniformly particles. Moreover, the...
Sat, 10/05/2019 - 03:36
Author(s): Amira M. Hegazy, Rehab M. Abdelfatah, Hamada M. Mahmoud, Mohamed A. ElsayedAbstractCombination of pesticides; acetamiprid, flutolanil and etofenprox are usually used for tomato fruits for protecting them against pest infection. Generally, pesticides, residues could be one of the health hazard sources. Two specific simple sensitive chromatographic methods are developed for simultaneous...
Fri, 10/04/2019 - 03:32
ABSTRACT In this study, quick, easy, cheap, effective, rugged and safe combined with dispersive liquid‐liquid microextraction is developed for extraction of ten pesticides in complex sample matrices of water and milk. In this regard, effective factors of proposed extraction technique combined with gas chromatography‐flame ionization detector were designed, modeled and optimized using central...
Thu, 10/03/2019 - 03:31
BACKGROUND Several diseases and insects may cause potential damage to the normal growth of cucumber. Azoxystrobin and meptyldinocap are effective against pathogens which have developed reduced sensitivity to other fungicides because of their novel mode of action. Azoxystrobin is persistent in various crops and environment. However, there is a lack of research on dissipation of these two...
Tue, 10/01/2019 - 03:38
Author(s): M.S. Hossain, B.C. Sarkar, M.M. Hossain, M.Y. Mian, E.G. Rajotte, R. Muniappan, M.E. O'RourkeAbstractMango (Mangifera indica L.) is a major fruit crop throughout the tropical and sub-tropical regions of the world including Bangladesh. The Oriental fruit fly, Bactrocera dorsalis (Hendel) (Diptera: Tephritidae) is a major pest of mango causing both quantitative and qualitative losses as...
Tue, 10/01/2019 - 03:38
Author(s): Honest Machekano, Brighton M. Mvumi, Peter Chinwada, Susan J. Kageler, Richard RwafaAbstractReducing farm-level grain storage losses for small-scale rural farmers is important for sustainable household food security in Africa. Farmer-managed trials were conducted over two 32-week grain storage seasons in Zimbabwe to evaluate the effectiveness of diatomaceous earths (DEs); Protect-It®...
Tue, 10/01/2019 - 03:38
Author(s): R.R. Sharma, S.C. Datta, Eldho VargheseAbstractSeveral pests and diseases infest apple during production, potentially causing heavy losses. Numerous pesticides are used to control pests and diseases, sprays of which contaminate the environment and result in pesticide residues. Among Good Agricultural Practices (GAPs), particle film technology (PFT) is promising for organic fruit...
Tue, 10/01/2019 - 00:00
A novel multiresidue analytical method based on disposable pipette extraction (DPX) to determine the trace level of 28 pesticides in wine samples using liquid chromatography–tandem mass spectrometry (LC–MS/MS) has been developed. The DPX method is used for both extraction and purification. After the optimization, targets were eluted with 1% HCl in acetonitrile and the eluent...
Mon, 09/30/2019 - 17:15
Global climatic fluctuations and the increasing population have been responsible for the decline in the crop productivity. The chemical fertilizers, pesticides, and suitable genetic resources are commonly used for improving the crop yield. Magnetic field (MF) therapy for plants and animals has been found to be an effective and emerging tool to control diseases and increase tolerance against the...
Sat, 09/28/2019 - 03:30
by Markus Rienth, Julien Crovadore, Sana Ghaffari, François Lefort The reduction of synthetic fungicides in agriculture is necessary to guarantee a sustainable production that protects the environment and consumers’ health. Downy mildew caused by the oomycete Plasmopara viticola is the major pathogen in viticulture worldwide and responsible for up to 60% of pesticide treatments. Alternatives to...
Sat, 09/28/2019 - 03:29
Author(s): J. Ho, R. Prosser, M. Hasani, H. Chen, B. Skanes, W.D. Lubitz, K. WarrinerAbstractChlorpyrifos is a widely used insecticide in apple production but there are concerns that residues ingested by consumers can lead to chronic neurological conditions. In the following, a method based on Advanced Oxidation Process (AOP) was validated for the degradation of chlorpyrifos on apples and...
Sat, 09/28/2019 - 03:29
Author(s): Anil Kumar Anal, Giorgia Perpetuini, Awanwee Petchkongkaew, Reasmey Tan, Sylvie Avallone, Rosanna Tofalo, Hai Van Nguyen, Son Chu-Ky, Phu Ha Ho, Thanh Tam Phan, Yves WachéAbstractSouth-East Asia is well-known for traditionally fermented foods. However, these products are generally still produced at small scale following traditional procedures. Nowadays, consumers are particularly aware...
Thu, 09/26/2019 - 03:22
The recently published study by Truong and Pessah (2018) raised severe food safety concerns about the application of the diamide pesticides chlorantraniliprole and flubendiamide. In the present letter we wish to share our thoughts provoked by their paper and provide important future research perspectives.
Wed, 09/25/2019 - 03:34
Author(s): He Xiao, Asfandyar Shahab, Jieyue Li, Beidou Xi, Xiaojie Sun, Huijun He, Guo YuAbstractIn this study, heavy metals including Cd, Pb, Zn, Mn, Cu, Ni, Cr, As, and Hg, in the surface sediment (0–10 cm) of the Huixian wetland in a karst region were investigated in terms of their spatial distribution, ecological risks, and possible sources. Samples were collected from 13 typical sites...
Tue, 09/24/2019 - 03:38
Author(s): Herbert Musarurwa, Luke Chimuka, Vusumzi Emmanuel Pakade, Nikita Tawanda TavengwaAbstractQuEChERS (quick, easy, cheap, effective, rugged, and safe) is one of the pre-treatment techniques that has gained tremendous popularity among researchers during pesticide analysis of food and agricultural samples. Since its inception, this method is considered particularly suitable and effective in...
Sun, 09/22/2019 - 03:28
Author(s): Gomaa R.M. Ramadan, Samir A.M. Abdelgaleil, Mohamed S. Shawir, Ahmed S. El-bakary, Peter A. Edde, Thomas W. PhillipsAbstractEthanedinitrile (EDN) is used to fumigate logs and timber products, and it has the potential as an alternative fumigant for stored food products. Other work has demonstrated efficacy of EDN for controlling stored grain pests, but information on EDN residues in...
Sun, 09/22/2019 - 03:25
The aim of this work was to develop an efficient method for the selective extraction and analysis of fenoxycarb, a carbamate pesticide, in mussel samples using a molecularly imprinted solid‐phase extraction device. The optimization of molecularly imprinted polymer synthesis was performed using the experimental design under the response surface methodology approach. A fast rebinding study and...

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