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https://www.readbyqxmd.com/read/28636110/cumulative-toxicity-of-neonicotinoid-insecticide-mixtures-to-chironomus-dilutus-under-acute-exposure-scenarios
#1
Erin M Maloney, Christy A Morrissey, John V Headley, Kerry M Peru, Karsten Liber
Extensive agricultural use of neonicotinoid insecticide products has resulted in the presence of neonicotinoid mixtures in surface waters worldwide. Although many aquatic insect species are known to be sensitive to neonicotinoids, the impact of neonicotinoid mixtures is poorly understood. In the present study, the cumulative toxicity of binary and ternary mixtures of select neonicotinoids (imidacloprid, clothianidin, and thiamethoxam) was characterized under acute (96-h) exposure scenarios using the larval midge Chironomus dilutus as a representative aquatic insect species...
June 21, 2017: Environmental Toxicology and Chemistry
https://www.readbyqxmd.com/read/28633115/occurrence-of-commonly-used-pesticides-in-personal-air-samples-and-their-associated-health-risk-among-paddy-farmers
#2
Hazwanee Hamsan, Yu Bin Ho, Siti Zulfa Zaidon, Zailina Hashim, Nazamid Saari, Ali Karami
Tanjung Karang, Selangor, is widely known for its paddy cultivation activity and hosts the third largest paddy field in Malaysia. Pesticides contamination in agriculture fields has become an unavoidable problem, as pesticides are used to increase paddy productivity and reduce plant disease. Human exposure to agrichemicals is common and could results in both acute and chronic health effects, such as acute and chronic neurotoxicity. This study aims to determine the concentrations of commonly used pesticides (azoxystrobin, buprofezin, chlorantraniliprole, difenoconazole, fipronil, imidacloprid, isoprothiolane, pretilachlor, propiconazole, pymetrozine, tebuconazole, tricyclazole, and trifloxystrobin) in personal air samples and their associated health risks among paddy farmers...
June 17, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28631831/spatial-and-temporal-trends-and-flow-dynamics-of-glyphosate-and-other-pesticides-within-an-agricultural-watershed-in-argentina
#3
Débora J Pérez, Elena Okada, Eduardo De Gerónimo, Mirta L Menone, Virginia C Aparicio, José L Costa
In the present study, we evaluated the spatial and temporal trends of current use pesticides in surface water and sediments and to determine its relation with hydrological stream dynamics within the agricultural watershed of El Crespo stream. We sampled two contrasting sites: Site 1 (upstream) surrounded by agricultural lands, and Site 2 (downstream) surrounded by natural grasslands. Most of the applied pesticides (i.e. glyphosate, 2,4-D, atrazine, tebuconazole and imidacloprid) were detected in high frequencies in surface water samples at both sites...
June 20, 2017: Environmental Toxicology and Chemistry
https://www.readbyqxmd.com/read/28616862/loops-d-e-and-g-in-the-drosophila-d%C3%AE-1-subunit-contribute-to-high-neonicotinoid-sensitivity-of-d%C3%AE-1-chicken-%C3%AE-2-nicotinic-acetylcholine-receptor
#4
Makoto Ihara, Mai Hikida, Hiroyuki Matsushita, Kyosuke Yamanaka, Yuya Kishimoto, Kazuki Kubo, Shun Watanabe, Mifumi Sakamoto, Koutaro Matsui, Akihiro Yamaguchi, Daiki Okuhara, Shogo Furutani, David B Sattelle, Kazuhiko Matsuda
BACKGROUND AND PURPOSE: Neonicotinoid insecticides interact with the orthosteric site formed at subunit interfaces of insect nicotinic acetylcholine receptors (insect nACh receptors). However, their interactions with the orthosteric sites at α-non α and α-α subunit interfaces remain poorly understood. The aim of this study was to elucidate the mechanism of neonicotinoid actions using the Drosophila Dα1-chicken β2 hybrid nACh receptor. EXPERIMENTAL APPROACH: Computer models of the (Dα1)3 (β2)2 nACh receptor in complex with imidacloprid and thiacloprid were generated...
June 14, 2017: British Journal of Pharmacology
https://www.readbyqxmd.com/read/28614939/-2-cases-of-acute-imidacloprid-poisoning-clinical-analysis
#5
X L Yuan, X D Jian, K Wang
No abstract text is available yet for this article.
April 20, 2017: Chinese Journal of Industrial Hygiene and Occupational Diseases
https://www.readbyqxmd.com/read/28609661/the-use-of-pesticides-in-belgian-illicit-indoor-cannabis-plantations
#6
Eva Cuypers, Wouter Vanhove, Joachim Gotink, Arne Bonneure, Patrick Van Damme, Jan Tytgat
Cannabis (Cannabis spp.) use and cultivation continue to increase in many (European) countries. The illicit indoor cannabis plantations that supply Belgian and European cannabis markets create problems and concerns about health and safety of intervention staff, dismantling companies, the direct environment of cannabis plantations and, eventually, of cannabis users. Main risks may come from pesticide residues on plants, cultivation infrastructure and materials; left-over plant growth-promoting substances; mycotoxins from fungal pathogens on harvested plants; and/or high levels of cannabinoids in cannabis plant parts for consumption...
May 25, 2017: Forensic Science International
https://www.readbyqxmd.com/read/28608930/risk-assessment-of-imidacloprid-use-in-forest-settings-on-the-aquatic-macroinvertebrate-community
#7
Elizabeth P Benton, Jerome F Grant, Rebecca J Nichols, R Jesse Webster, John S Schwartz, Joseph K Bailey
The isolated effects of a single insecticide can be difficult to assess in natural settings due to the presence of numerous pollutants in many watersheds. Imidacloprid use for suppressing hemlock woolly adelgid (HWA), Adelges tsugae (Annand) (Hemiptera: Adelgidae), in forests offers a rare opportunity to assess potential impacts to aquatic macroinvertebrates in relatively pristine landscapes. Aquatic macroinvertebrate communities were assessed in 9 streams in Great Smoky Mountains National Park (GRSM). The streams flow through hemlock conservation areas where imidacloprid soil drench treatments were applied for HWA suppression...
June 13, 2017: Environmental Toxicology and Chemistry
https://www.readbyqxmd.com/read/28605838/dietary-risk-assessment-of-pesticides-from-vegetables-and-drinking-water-in-gardening-areas-in-burkina-faso
#8
Edouard Lehmann, Nuria Turrero, Marius Kolia, Yacouba Konaté, Luiz Felippe de Alencastro
Vegetables and water samples have been collected around the lake of Loumbila in Burkina Faso. Pesticides residues in food commodities were analyzed using a modified QuEChERS extraction method prior analysis on GC-MS and UPLC-MS/MS of 31 pesticides. Maximum Residue Limits (MRLs) were exceeded in 36% of the samples for seven pesticides: acetamiprid, carbofuran, chlorpyrifos, lambda-cyhalothrin, dieldrin, imidacloprid and profenofos. Exceedance of MRLs suggests a risk for the consumers and limits the opportunities of exportation...
June 6, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28605646/imidacloprid-application-changes-microbial-dynamics-and-enzymes-in-rice-soil
#9
Bibhab Mahapatra, Totan Adak, Naveen K B Patil, Guru P Pandi G, G Basana Gowda, N N Jambhulkar, Manoj Kumar Yadav, P Panneerselvam, Upendra Kumar, Sushmita Munda, Mayabini Jena
Extensive use of imidacloprid in rice ecosystem may alter dynamics of microorganisms and can change soil biochemical properties. The objective of this study was to assess the effect of imidacloprid on growth and activities of microbes in tropical rice soil ecosystem. Four treatments, namely, recommended dose (at 25g a.i. ha(-1), RD), double the recommended dose (at 50g a.i. ha(-1), 2RD), five times the recommended dose (at 125g a.i. ha(-1), 5RD) & ten times the recommended dose (at 250g a.i. ha(-1), 10RD) along with control were imposed under controlled condition...
June 9, 2017: Ecotoxicology and Environmental Safety
https://www.readbyqxmd.com/read/28593544/the-environmental-risks-of-neonicotinoid-pesticides-a-review-of-the-evidence-post-2013
#10
Thomas James Wood, Dave Goulson
Neonicotinoid pesticides were first introduced in the mid-1990s, and since then, their use has grown rapidly. They are now the most widely used class of insecticides in the world, with the majority of applications coming from seed dressings. Neonicotinoids are water-soluble, and so can be taken up by a developing plant and can be found inside vascular tissues and foliage, providing protection against herbivorous insects. However, only approximately 5% of the neonicotinoid active ingredient is taken up by crop plants and most instead disperses into the wider environment...
June 7, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28591204/feeding-toxicity-and-impact-of-imidacloprid-formulation-and-mixtures-with-six-representative-pesticides-at-residue-concentrations-on-honey-bee-physiology-apis-mellifera
#11
Yu Cheng Zhu, Jianxiu Yao, John Adamczyk, Randall Luttrell
Imidacloprid is the most widely used insecticide in agriculture. In this study, we used feeding methods to simulate in-hive exposures of formulated imidacloprid (Advise® 2FL) alone and mixtures with six representative pesticides for different classes. Advise, fed at 4.3 mg/L (equal to maximal residue detection of 912 ppb active ingredient [a.i.] in pollen) induced 36% mortality and 56% feeding suppression after 2-week feeding. Treatments with individual Bracket (acephate), Karate (λ-cyhalothrin), Vydate (oxamyl), Domark (tetraconazole), and Roundup (glyphosate) at residue level had a mortality range of 1...
2017: PloS One
https://www.readbyqxmd.com/read/28582726/the-vibrational-properties-of-the-bee-killer-imidacloprid-insecticide-a-molecular-description
#12
Antônio A G Moreira, Pedro De Lima-Neto, Ewerton W S Caetano, Ito L Barroso-Neto, Valder N Freire
The chemical imidacloprid belongs to the neonicotinoids insecticide class, widely used for insect pest control mainly for crop protection. However, imidacloprid is a non-selective agrochemical to the insects and it is able to kill the most important pollinators, the bees. The high toxicity of imidacloprid requires controlled release and continuous monitoring. For this purpose, high performance liquid chromatography (HPLC) is usually employed; infrared and Raman spectroscopy, however, are simple and viable techniques that can be adapted to portable devices for field application...
May 29, 2017: Spectrochimica Acta. Part A, Molecular and Biomolecular Spectroscopy
https://www.readbyqxmd.com/read/28578396/neonicotinoid-induced-pathogen-susceptibility-is-mitigated-by-lactobacillus-plantarum-immune-stimulation-in-a-drosophila-melanogaster-model
#13
Brendan A Daisley, Mark Trinder, Tim W McDowell, Hylke Welle, Josh S Dube, Sohrab N Ali, Hon S Leong, Mark W Sumarah, Gregor Reid
Pesticides are used extensively in food production to maximize crop yields. However, neonicotinoid insecticides exert unintentional toxicity to honey bees (Apis mellifera) that may partially be associated with massive population declines referred to as colony collapse disorder. We hypothesized that imidacloprid (common neonicotinoid; IMI) exposure would make Drosophila melanogaster (an insect model for the honey bee) more susceptible to bacterial pathogens, heat stress, and intestinal dysbiosis. Our results suggested that the immune deficiency (Imd) pathway is necessary for D...
June 2, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28551560/ornamental-plants-on-sale-to-the-public-are-a-significant-source-of-pesticide-residues-with-implications-for-the-health-of-pollinating-insects
#14
A Lentola, A David, A Abdul-Sada, A Tapparo, D Goulson, E M Hill
Garden centres frequently market nectar- and pollen-rich ornamental plants as "pollinator-friendly", however these plants are often treated with pesticides during their production. There is little information on the nature of pesticide residues present at the point of purchase and whether these plants may actually pose a threat to, rather than benefit, the health of pollinating insects. Using mass spectrometry analyses, this study screened leaves from 29 different 'bee-friendly' plants for 8 insecticides and 16 fungicides commonly used in ornamental production...
May 25, 2017: Environmental Pollution
https://www.readbyqxmd.com/read/28549715/direct-residue-analysis-of-systemic-insecticides-and-some-of-their-relevant-metabolites-in-wines-by-liquid-chromatography-mass-spectrometry
#15
J D Berset, S Mermer, A E Robel, V M Walton, M L Chien, J A Field
A direct large volume injection (DI-LVI) high performance liquid chromatography - tandem mass spectrometry (HPLC-MS/MS) method was developed and validated for the quantitative determination of 16 systemic insecticides and their main plant metabolites. The assays were conducted on commercial red and white wines made from grapes grown in major wine-producing regions nationally and internationally. Using a 1:20 dilution and an injection volume of 800μL, a limit of quantitation (LOQ) of 1μgL(-1) for all analytes was achieved...
May 13, 2017: Journal of Chromatography. A
https://www.readbyqxmd.com/read/28543984/cycle-affects-imidacloprid-efficiency-by-mediating-cytochrome-p450-expression-in-the-brown-planthopper-nilaparvata-lugens
#16
K Kang, P Yang, R Pang, L Yue, W Zhang
Circadian clocks influence most behaviours and physiological activities in animals, including daily fluctuations in metabolism. However, how the clock gene cycle influences insects' responses to pesticides has rarely been reported. Here, we provide evidence that cycle affects imidacloprid efficacy by mediating the expression of cytochrome P450 genes in the brown planthopper (BPH) Nilaparvata lugens, a serious insect pest of rice. Survival bioassays showed that the susceptibility of BPH adults to imidacloprid differed significantly between the two time points tested [Zeitgeber Time 8 (ZT8) and ZT4]...
May 23, 2017: Insect Molecular Biology
https://www.readbyqxmd.com/read/28536793/detection-of-insecticide-resistance-in-bradysia-odoriphaga-yang-et-zhang-diptera-sciaridae-in-china
#17
Chengyu Chen, Xueyan Shi, Nicolas Desneux, Peng Han, Xiwu Gao
Bradysia odoriphaga Yang et Zhang is a destructive insect pest of Chinese chives. To understand the current status of insecticide resistance of B. odoriphaga in China, the sensitivity variation of eight field populations to six commonly used insecticides, including chlorpyrifos, phoxim, imidacloprid, thiamethoxam, clothianidin and beta-cypermethrin were evaluated. The results showed that almost all the tested B. odoriphaga populations had developed moderate to high resistance to chlorpyrifos and phoxim. There were different resistance levels found in the eight field populations among the three neonicotinoids, imidacloprid, thiamethoxam and clothianidin...
May 23, 2017: Ecotoxicology
https://www.readbyqxmd.com/read/28531918/protective-effect-of-ethanolic-extract-of-urtica-urens-l-against-the-toxicity-of-imidacloprid-on-bone-remodeling-in-rats-and-antioxidant-activities
#18
Massara Mzid, Riadh Badraoui, Sameh Ben Khedir, Zouheir Sahnoun, Tarek Rebai
Imidacloprid (IMI) is very harmful to human health and cause problems. Recently, plants have been considered as potential agents for protection against these disorders. Urtica urens L. (UU) is very useful for relieving rheumatic pains and there is no scientific evidence justifying its use, which lets us think of its direct effect on the bone. This study aimed to investigate the protective effect of UU against toxicity effects of IMI in female rat. Rats were divided into control group, 3 groups treated with IMI at 50, 200 or 300mg/kg/day and 3 groups co-treated with IMI (50, 200 or 300mg/kg/day)+100mg/kg/day of UU...
July 2017: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/28526088/assessment-of-parasitological-findings-in-heartworm-infected-beagles-treated-with-advantage-multi%C3%A2-for-dogs-10-imidacloprid%C3%A2-%C3%A2-2-5-moxidectin-and-doxycycline
#19
Molly D Savadelis, Cameon M Ohmes, Joe A Hostetler, Terry L Settje, Robert Zolynas, Michael T Dzimianski, Andrew R Moorhead
BACKGROUND: Anecdotal reports support the position that the adulticidal heartworm treatment utilizing doxycycline and Advantage Multi®/Advocate® for Dogs (10% imidacloprid + 2.5% moxidectin) has successfully converted antigen-positive dogs to antigen-negative. To date, no controlled experimental studies have demonstrated the adulticidal efficacy of this treatment regimen. The aim of this study was to evaluate the parasitological and clinical efficacy of Advantage Multi® for Dogs (IMD + MOX) and doxycycline in heartworm-infected beagles...
May 19, 2017: Parasites & Vectors
https://www.readbyqxmd.com/read/28526068/heat-pretreatment-of-canine-samples-to-evaluate-efficacy-of-imidacloprid%C3%A2-%C3%A2-moxidectin-and-doxycycline-in-heartworm-treatment
#20
Alexandre José Rodrigues Bendas, Flavya Mendes-de-Almeida, Cristiano Von Simson, Norma Labarthe
BACKGROUND: Considering the recent information on the increase of Dirofilaria immitis antigen detection by rapid assays in canine blood samples after heat treatment, the proposal that immune complexes block D. immitis antigen detection and that macrocyclic lactone + doxycycline (alternative protocol) might lead to increased production of those immune complexes, resulting in the erroneous diagnosis of adult worm elimination, and that there is no recommended adulticide marketed in Brazil, a study was performed to evaluate the interference of moxidectin + doxycycline (moxi-doxy) on diagnostic procedures when heartworm positive dogs are treated with this alternative protocol...
May 19, 2017: Parasites & Vectors
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