Pesticide residues

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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...
Sat, 09/21/2019 - 03:32
Author(s): Jiehong Zhou, Zhiying Yang, Kai Li, Xiaohua YuAbstractIn recent years, labor-intensive agricultural products from developing countries have exhibited inferior performance in international trade due to quality and safety incidents, among which pesticide residue is a major issue. Aiming to improve food quality and safety in the context of cooperatives, we introduced three categories of...
Sat, 09/21/2019 - 03:28
Sour rot, caused by Geotrichum citriaurantii (G. citri-aurantii.), is one of the most serious grapevine secondary infection diseases in China. We have determined that pterostilbene, the most important phytoalexin, effectively inhibits the activity of G. citri‐aurantii. To study the synthesis mechanism of pterostilbene against G. citri‐aurantii in grape, we initially detected the content of...
Sat, 09/21/2019 - 03:28
Ion chromatography coupled with mass spectrometry is an established technique for determination of ionic analytes, however, sophisticated buffer removal equipment is required to eliminate inorganic compounds from the eluate before introduction into the ion source of mass spectrometer. A standard high‐performance liquid chromatography coupled with tandem mass spectrometry setup using an ion...
Sat, 09/21/2019 - 03:26
Permethrin, a pyrethroid chemical, is widely used as a pesticide because of its rapid insecticidal activity. Although permethrin is considered to exert very low toxicity in mammals, the effects of early, low‐level, chronic exposure on the adult central nervous system are unclear. In this study, we investigated the effects of low‐level, chronic permethrin exposure in early life on the brain...
Sat, 09/21/2019 - 03:26
BACKGROUND Grape is an important fruit consumed either fresh or processed, therefore, fungicide misuse of grape has become an issue of global food safety and human health. Pyraclostrobin, and cyazofamid have been applied to grape frequently. RESULTS Here a simple QuEChERS (quick, easy, cheap, effective, rugged, and safe) liquid chromatography mass spectrometry technique has been developed and...
Sat, 09/21/2019 - 03:26
The occurrence and distribution of 11 organochlorine pesticides (OCPs) and their degradation products as well as of 17 polychlorinated biphenyl congeners (PCBs) were investigated for the first time in sediments of three (Lake Prošće, Lake Kozjak, Lake Kaluđerovac) out of 16 cascading karst lakes within the protected area of the Plitvice Lakes National Park in central Croatia. The 15-cm-long...

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