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https://www.readbyqxmd.com/read/27912787/a-comparative-laboratory-trial-evaluating-the-immediate-efficacy-of-fluralaner-afoxolaner-sarolaner-and-imidacloprid%C3%A2-%C3%A2-permethrin-against-adult-rhipicephalus-sanguineus-sensu-lato-ticks-attached-to-dogs
#1
Federica Burgio, Leon Meyer, Rob Armstrong
BACKGROUND: Acaricides are used to treat and prevent tick infestations, and a common clinical scenario is to administer an acaricide on observing an attached tick. Consequently, immediate acaricidal efficacy (onset of activity and speed of kill) results are clinically valuable. This study evaluated the immediate efficacy of four commercially available acaricides against adult Rhipicephalus sanguineus (sensu lato). METHODS: Forty dogs were blocked on hair length and tick carrying capacity, then randomly assigned to receive one of four treatments (fluralaner, sarolaner, imidacloprid + permethrin, or afoxolaner) or left untreated as controls...
December 3, 2016: Parasites & Vectors
https://www.readbyqxmd.com/read/27905515/neonicotinoid-induced-impairment-of-odour-coding-in-the-honeybee
#2
Mara Andrione, Giorgio Vallortigara, Renzo Antolini, Albrecht Haase
Exposure to neonicotinoid pesticides is considered one of the possible causes of honeybee (Apis mellifera) population decline. At sublethal doses, these chemicals have been shown to negatively affect a number of behaviours, including performance of olfactory learning and memory, due to their interference with acetylcholine signalling in the mushroom bodies. Here we provide evidence that neonicotinoids can affect odour coding upstream of the mushroom bodies, in the first odour processing centres of the honeybee brain, i...
December 1, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27898329/simultaneous-removal-of-structurally-different-pesticides-in-a-biomixture-detoxification-and-effect-of-oxytetracycline
#3
Alejandra Huete-Soto, Mario Masís-Mora, Verónica Lizano-Fallas, Juan Salvador Chin-Pampillo, Elizabeth Carazo-Rojas, Carlos E Rodríguez-Rodríguez
The biopurification systems (BPS) used for the treatment of pesticide-containing wastewater must present a versatile degrading ability, in order to remove different active ingredients according to the crop protection programs. This work aimed to assay the simultaneous removal of several pesticides (combinations of herbicides/insecticides/fungicides, or insecticides/fungicides) in a biomixture used in a BPS over a period of 115 d, and in the presence of oxytetracycline (OTC), an antibiotic of agricultural use that could be present in wastewater from agricultural pesticide application practices...
November 26, 2016: Chemosphere
https://www.readbyqxmd.com/read/27894057/factors-influencing-the-occurrence-and-distribution-of-neonicotinoid-insecticides-in-surface-waters-of-southern-ontario-canada
#4
John Struger, Josey Grabuski, Steve Cagampan, Ed Sverko, Daryl McGoldrick, Christopher H Marvin
The widespread use of neonicotinoid insecticides and recent increased regulatory scrutiny requires the generation of monitoring data with sufficient scope and resolution to provide decision makers with a better understanding of occurrence and distribution in the environment. This study presents a wide-scale investigation of neonicotinoid insecticides used across the range of agricultural activities from fifteen surface water sites in southern Ontario. Using statistical analysis, the correlation of individual compounds with land use was investigated, and the relationship between neonicotinoid occurrence and hydrologic parameters in calibrated water courses was also assessed...
November 25, 2016: Chemosphere
https://www.readbyqxmd.com/read/27889893/monitoring-and-distribution-patterns-of-pesticide-residues-in-soil-from-cotton-wheat-fields-of-pakistan
#5
Nazia Rafique, Saadia R Tariq, Dildar Ahmed
The excessive use of hazardous pesticides for massive cotton and wheat production has deteriorated the quality of Okara district's soil. Thus, in order to sustain the production of good-quality food, it is essential to determine the residue levels of pesticides in the agricultural soil and define their possible sources. Thus, the present study focused on the determination of selected pesticides in the soil samples obtained from cotton/wheat fields by using the modified multi-residue pesticide analysis method based on GCMS and HPLC-UV...
December 0: Environmental Monitoring and Assessment
https://www.readbyqxmd.com/read/27887834/neonicotinoids-and-bees-the-case-of-the-european-regulatory-risk-assessment
#6
Auteri Domenica, Arena Maria, Barmaz Stefania, Ippolito Alessio, Linguadoca Alberto, Molnar Tunde, Sharp Rachel, Szentes Csaba, Vagenende Benedicte, Verani Alessia
Neonicotinoid insecticides are systemic pesticides authorised in Europe since 1991. From their introduction on the market, they have received significant attention from the scientific community, particularly regarding the assessment of lethal and sublethal effects on bees. The availability of scientific evidence alongside some concerns raised on the bee health led to the development of more articulate risk assessment methodologies for pesticides. To support the European Commission in its decision-making process, since 2012 EFSA has been requested to evaluate the risk to bees posed by the exposure to neonicotinoids...
November 22, 2016: Science of the Total Environment
https://www.readbyqxmd.com/read/27885794/a-beekeepers-perspective-on-the-neonicotinoid-ban
#7
REVIEW
Norman L Carreck
Bees and agrochemicals have a long history. For example the first volume of IBRA's journal Bee World in 1919 contains mention of poisoning of bees by spraying an orchard with lead arsenate. Being insects, it is self-evident that the use of insecticides to control crop pests poses a risk to bees. Bee poisoning incidents became a very serious problem in the 1960s and 1970s with spraying of, in particular, oilseed rape with organophosphorus compounds. The introduction of carbamates and then especially synthetic pyrethroids reduced these problems...
November 25, 2016: Pest Management Science
https://www.readbyqxmd.com/read/27870235/efficacy-and-duration-of-action-of-oral-fluralaner-and-spot-on-moxidectin-imidacloprid-in-cats-infested-with-lynxacarus-radovskyi
#8
Hock Siew Han, Chiara Noli, Tiziana Cena
BACKGROUND: Lynxacarus radovskyi has been observed in cats in Malaysia; previously treatment with fipronil and moxidectin/imidacloprid spot-on has been described. OBJECTIVES: To compare the efficacy of two spot-on treatments of moxidectin/imidacloprid, two weeks apart to a single oral dose of fluralaner against Lynxacarus radovskyi and evaluate time to re-infestation. METHODS: Thirty cats were assigned to three groups of ten cats each. Group 1 received one 250 mg fluralaner tablet...
December 2016: Veterinary Dermatology
https://www.readbyqxmd.com/read/27862872/temporal-patterns-of-imidacloprid-resistance-throughout-a-growing-season-in-leptinotarsa-decemlineata-populations
#9
Justin Clements, Sean Schoville, Nathan Clements, Scott Chapman, Russell L Groves
BACKGROUND: The Colorado potato beetle, Leptinotarsa decemlineata (Say), is a major agricultural pest of commercial potatoes. Pest managers use a combination of control tactics to limit populations, including multiple insecticides. Finding a window of insecticide susceptibility and understanding genetic responses to insecticide exposure during a growing season may provide novel management recommendations for L. decemlineata. RESULTS: We examined temporal changes (during one growing season) in phenotypic response between a susceptible population and an imidacloprid-resistant population...
November 11, 2016: Pest Management Science
https://www.readbyqxmd.com/read/27853460/pre-sowing-seed-treatment-with-24-epibrassinolide-ameliorates-pesticide-stress-in-brassica-juncea-l-through-the-modulation-of-stress-markers
#10
Anket Sharma, Sharad Thakur, Vinod Kumar, Mukesh K Kanwar, Anup K Kesavan, Ashwani K Thukral, Renu Bhardwaj, Pravej Alam, Parvaiz Ahmad
The present experiment was designed to assess the effects of seed soaking with 24-epibrassinolide (EBR) on the physiology of Brassica juncea L. seedlings grown under imidacloprid (IMI) toxicity. Application of EBR increased the length of seedlings, dry weight, and pigment contents, polyphenols, total phenols, and organic acids under IMI toxicity. The expression of genes coding key enzymes of pigment, phenols, polyphenols, and organic acid biosynthetic pathways was also studied including CHLASE (chlorophyllase), PSY (phytoene synthase), CHS (chalcone synthase) and PAL (phenylalanine ammonialyase), CS (citrate synthase), SUCLG1 (succinyl Co-A ligase,), SDH (succinate dehydrogenase), FH (fumarate hydratase), MS (malate synthase)...
2016: Frontiers in Plant Science
https://www.readbyqxmd.com/read/27847184/non-stereoselective-transformation-of-the-chiral-insecticide-cycloxaprid-in-aerobic-soil
#11
Min Chen, Yupeng He, Yatian Yang, Lei Huang, Hanxue Zhang, Qingfu Ye, Haiyan Wang
Cycloxaprid (CYC) is one of the most effective neonicotinoid insecticides and is proposed to be a replacement of imidacloprid that has caused concerns over non-targeted resistance and ecological toxicity worldwide. The present study was performed with the (14)C-labeled racemic CYC and its two enantiomers in aerobic soil. Racemic CYC and the enantiomers 1S2R-CYC and 1R2S-CYC underwent non-stereoselective degradation in the three soils tested. During the incubation period, CYC was transformed into three achiral degradation products which displayed varying degradation kinetics dependent upon soil properties...
November 12, 2016: Science of the Total Environment
https://www.readbyqxmd.com/read/27846310/improving-mitochondrial-function-protects-bumblebees-from-neonicotinoid-pesticides
#12
Michael B Powner, Thomas E Salt, Chris Hogg, Glen Jeffery
Global pollination is threatened by declining insect pollinator populations that may be linked to neonicotinoid pesticide use. Neonicotinoids over stimulate neurons and depolarize their mitochondria, producing immobility and death. However, mitochondrial function can be improved by near infrared light absorbed by cytochrome c oxidase in mitochondrial respiration. In flies, daily exposure to 670nm light throughout life increases average lifespan and aged mobility, and reduces systemic inflammation. Here we treat bumble bees with Imidacloprid a common neonicotinoid...
2016: PloS One
https://www.readbyqxmd.com/read/27817922/characterization-of-pesticide-sorption-behaviour-of-slow-pyrolysis-biochars-as-low-cost-adsorbent-for-atrazine-and-imidacloprid-removal
#13
Abhishek Mandal, Neera Singh, T J Purakayastha
Agri-wastes biochars viz. eucalyptus bark (EBBC), corn cob (CCBC), bamboo chips (BCBC), rice husk (RHBC) and rice straw (RSBC) and acid treated RSBC (T-RSBC), were characterized for their physico-chemical properties and sorption behaviour of atrazine and imidacloprid was studied. Kinetics study suggested that except atrazine adsorption on RSBC, which was best explained by the pseudo second order model, sorption of atrazine and imidacloprid on biochars was well explained by the modified Elovich model. Among the five normal biochars, the RSBC showed the maximum atrazine (37...
January 15, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/27808432/passage-of-fiproles-and-imidacloprid-from-urban-pest-control-uses-through-wastewater-treatment-plants-in-northern-california
#14
Akash M Sadaria, Rebecca Sutton, Kelly D Moran, Jennifer Teerlink, Jackson Vanfleet Brown, Rolf U Halden
Urban pest control insecticides, specifically fipronil and its four major degradates (fipronil sulfone, sulfide, desulfinyl, and amide) and imidacloprid, were monitored during drought conditions in eight San Francisco Bay wastewater treatment plants (WWTPs). In influent and effluent, ubiquitous detections were obtained in units of ng/L for fipronil (13-88), fipronil sulfone (1-28), fipronil sulfide (1-5) and imidacloprid (58-306). In influent, 100% of imidacloprid and 62 ± 9% of total fiproles (fipronil and degradates) were present in the dissolved state, with the balance being bound to filter-removable particulates...
November 3, 2016: Environmental Toxicology and Chemistry
https://www.readbyqxmd.com/read/27803884/imidacloprid-inhibits-ige-mediated-rbl-2h3-cell-degranulation-and-passive-cutaneous-anaphylaxis
#15
Linbo Shi, Li Zou, Jinyan Gao, Huaing Xu, Xiaoyun Shi, Hongbing Chen
BACKGROUND: Imidacloprid has been commonly used as a pesticide for crop protection and acts as nicotinic acetylcholine receptor agonists. Little information about the relationship between imidacloprid and allergy is available. OBJECTIVE: This study aims to examine the effects of imidacoprid on IgE-mediated mast cell activation. METHODS: The rat basophilic leukemia cell line RBL-2H3 (RBL-2H3 cells) were treated with 10(-3) - 10(-12) mol/L imidacloprid, followed by measuring the mediator production, influx of Ca(2+) in IgE-activated RBL-2H3 cells, and the possible effects of imidacoprid on anti-dinitrophenyl IgE-induced passive cutaneous anaphylaxis (PCA)...
October 2016: Asia Pacific Allergy
https://www.readbyqxmd.com/read/27793627/metabolic-imidacloprid-resistance-in-the-brown-planthopper-nilaparvata-lugens-relies-on-multiple-p450-enzymes
#16
Yixi Zhang, Yuanxue Yang, Huahua Sun, Zewen Liu
Target insensitivity contributing to imidacloprid resistance in Nilaparvata lugens has been reported to occur either through point mutations or quantitative change in nicotinic acetylcholine receptors (nAChRs). However, the metabolic resistance, especially the enhanced detoxification by P450 enzymes, is the major mechanism in fields. From one field-originated N. lugens population, an imidacloprid resistant strain G25 and a susceptible counterpart S25 were obtained to analyze putative roles of P450s in imidacloprid resistance...
October 26, 2016: Insect Biochemistry and Molecular Biology
https://www.readbyqxmd.com/read/27793626/ippa08-allosterically-enhances-the-action-of-imidacloprid-on-nicotinic-acetylcholine-receptors
#17
Haibo Bao, Xusheng Shao, Yixi Zhang, Jiagao Cheng, Yunchao Wang, Xiaoyong Xu, Jichao Fang, Zewen Liu, Zhong Li
Our previous study showed that IPPA08, a cis-configuration neonicotinoid compound with unique oxabridged substructure, acted as a specific synergist to neonicotinoid insecticides targeting nicotinic acetylcholine receptors (nAChRs). Heteropentamer nAChRs have diverse characteristics and can form canonical and noncanonical subunit interfaces. While canonical interfaces have been exploited as targets of many drugs, noncanonical interfaces have received less attention. In this study, the mechanism of IPPA08 synergism was evaluated on hybrid nAChRs consisting of three α1 subunits from the brown planthopper and two rat β1 subunits (Nlα1/rβ2) expressed in Xenopus oocytes...
October 26, 2016: Insect Biochemistry and Molecular Biology
https://www.readbyqxmd.com/read/27792329/excess-imidacloprid-exposure-causes-the-heart-tube-malformation-of-chick-embryos
#18
Lin-Rui Gao, Shuai Li, Jing Zhang, Chang Liang, En-Ni Chen, Shi-Yao Zhang, Manli Chuai, Yongping Bao, Guang Wang, Xuesong Yang
As a neonicotinoid pesticide, imidacloprid is widely used to control sucking insects on agricultural planting and fleas on domestic animals. However, the extent to which imidacloprid exposure has an influence on cardiogensis in early embryogenesis is still poorly understood. In vertebrates, the heart is the first organ to be formed. In this study to address whether or not imidacloprid exposure affects early heart development, the early chick embryo has been used as an experimental model because of the accessibility of chick embryo at its early developmental stage...
October 28, 2016: Journal of Agricultural and Food Chemistry
https://www.readbyqxmd.com/read/27782041/neonicotinoid-insecticides-alter-the-gene-expression-profile-of-neuron-enriched-cultures-from-neonatal-rat-cerebellum
#19
Junko Kimura-Kuroda, Yasumasa Nishito, Hiroko Yanagisawa, Yoichiro Kuroda, Yukari Komuta, Hitoshi Kawano, Masaharu Hayashi
Neonicotinoids are considered safe because of their low affinities to mammalian nicotinic acetylcholine receptors (nAChRs) relative to insect nAChRs. However, because of importance of nAChRs in mammalian brain development, there remains a need to establish the safety of chronic neonicotinoid exposures with regards to children's health. Here we examined the effects of longterm (14 days) and low dose (1 μM) exposure of neuron-enriched cultures from neonatal rat cerebellum to nicotine and two neonicotinoids: acetamiprid and imidacloprid...
October 4, 2016: International Journal of Environmental Research and Public Health
https://www.readbyqxmd.com/read/27775597/susceptibility-of-bemisia-tabaci-meam1-hemiptera-aleyrodidae-to-imidacloprid-thiamethoxam-dinotefuran-and-flupyradifurone-in-south-florida
#20
Hugh A Smith, Curtis A Nagle, Charles A MacVean, Cindy L McKenzie
Populations of Bemisa tabaci MEAM1 were established from nineteen locations in south Florida, primarily from commercial tomato fields, and were tested using a cotton leaf petiole systemic uptake method for susceptibility to the nicotinic acetylcholine agonist insecticides imidacloprid, thiamethoxam, dinotefuran and flupyradifurone. Eleven populations produced LC50s for one or more chemicals that were not significantly different from the susceptible laboratory colony based on overlapping fiducial limits, indicating some degree of susceptibility...
October 20, 2016: Insects
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