Read by QxMD icon Read


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
D Gallart-Mateu, S Armenta, M de la Guardia
The use of ion mobility spectrometry (IMS) has been evaluated as analytical methodology to detect and evaluate the occupational exposure to pesticides. The developed IMS methodology was used, in positive and negative modes, to determine the presence of pesticides in air and to evaluate possible inhalation exposures of workers and users based on active sampling on Teflon membranes and direct thermal desorption IMS. The negative IMS mode was used to determine bensulfuron, clorpyrifos, diniconazole, diuron, flutolanil and imidacloprid, while the positive mode was employed to evaluate formetanate, metalaxyl, metamitrone, metribuzin, paclobutrazol and pirimicarb...
December 1, 2016: Talanta
Lobna A Hussein, Noha F El Azab, Maha F Abdel-Ghany
A sensitive, selective, and validated HPLC-diode-array detection method was developed for the simultaneous determination of five neonicotinoid insecticides-acetamiprid, imidacloprid, nitenpyram, flonicamid, and thiacloprid-and their primary metabolite, 6-chloronicotinic acid, in cucumbers and soil based on the quick, easy, cheap, effective, rugged, and safe (QuEChERS) technique as a pretreatment procedure. In the QuEChERS procedure, cucumber samples were extracted with acetonitrile and cleaned using C18, whereas soil samples were extracted with an acetonitrile-dichloromethane mixture (1 + 2)...
October 19, 2016: Journal of AOAC International
Yadira Ansoar-Rodríguez, Cintya A Christofoletti, Jorge E Correia, Raphael B de Souza, Cristina Moreira-de-Sousa, Ana Claudia de Castro Marcato, Odair C Bueno, Osmar Malaspina, Elaine C M Silva-Zacarin, Carmem S Fontanetti
Liver is very sensitive to environmental contaminants such as pesticides, it being the first target of toxicity of a substance. The objective of this study was to investigate the possible effects of the insecticide imidacloprid (IMI) on the liver of Oreochromis niloticus according concentrations used for growing sugarcane. A semi-quantitative analysis of histopathological alterations of IMI on liver was performed by light microscopy and cellular labeling of heat shock proteins (HSP70) by immunohistochemistry...
October 20, 2016: Journal of Environmental Science and Health. Part. B, Pesticides, Food Contaminants, and Agricultural Wastes
Chao Zhang, Runqiang Liu, Jun He, Zhiqing Ma, Xing Zhang
In order to develop novel botanical insecticides, the joint action of Ligusticum chuanxiong oil (LCO) and lemongrass oil (LO) against Aphis citricola van der Goot was determined systematically indoors and outdoors. The chemical profiles of LCO and LO as determined by gas chromatography-mass spectrometry (GC-MS) analysis revealed that the main compounds from LCO were (Z)-ligustilide (44.58%) and senkyunolide A (26.92%), and that of LO were geranial (42.16%) and neral (32.58%), respectively. The mixture of LCO and LO showed significant synergy against A...
October 12, 2016: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
Melissa Whitfield Aslund, Michael Winchell, Lisa Bowers, Sean McGee, Jane Tang, Lauren Padilla, Colleen Greer, Loren Knopper, Dwayne R J Moore
A probabilistic ecological risk assessment (ERA) was conducted to determine the potential effects of acute and chronic exposure of aquatic invertebrate communities to imidacloprid arising from labeled agricultural and non-agricultural uses in the United States. Aquatic exposure estimates were derived using a higher tier refined modeling approach that accounts for realistic variability in environmental and agronomic factors. Toxicity was assessed using refined acute and chronic community-level effect metrics for aquatic invertebrates (i...
October 18, 2016: Environmental Toxicology and Chemistry
Julio C López-Doval, Cassiana C Montagner, Anjaína Fernandes de Alburquerque, Viviane Moschini-Carlos, Gisela Umbuzeiro, Marcelo Pompêo
Reservoirs located in urban areas suffer specific pressures related to human activities. Their monitoring, management, and protection requirements differ from reservoirs situated in non-urbanized areas. The objectives of this study were: (a) to determine the concentrations of select pesticides and emerging pollutants (EPs) present in an urban reservoir; (b) to describe their possible spatial distributions; and (c) to quantify the risks for aquatic life and safeguard drinking water supplies. For this purpose, the Guarapiranga reservoir was studied as an example of a multi-stressed urban reservoir in a tropical region...
October 13, 2016: Science of the Total Environment
Rui Pang, Meng Chen, Zhikun Liang, Xiangzhao Yue, Hu Ge, Wenqing Zhang
The cytochrome P450 CYP6ER1 has been reported to play an important role in imidacloprid resistance of the brown planthopper (BPH), Nilaparvata lugens, and is overexpressed in most resistant populations. In the present study, we confirmed that CYP6ER1 expression can be induced by certain levels of imidacloprid. Developmental expression analysis revealed that CYP6ER1 was expressed highly in the adult stage, and tissue distribution analysis showed that CYP6ER1 was expressed mainly in the fat body and midgut. RNA interference (RNAi) of CYP6ER1 and transgenic expression of CYP6ER1 in Drosophila melanogaster both suggested that the expression of CYP6ER1 is sufficient to confer imidacloprid resistance...
October 10, 2016: Scientific Reports
John E Casida, Kathleen A Durkin
Pesticide researchers are students of nature, and each new compound and mechanism turns a page in the ever-expanding encyclopedia of life. Pesticides are both probes to learn about life processes and tools for pest management to facilitate food production and enhance health. In contrast to some household and industrial chemicals, pesticides are assumed to be hazardous to health and the environment until proven otherwise. About a thousand current pesticides working by more than 100 different mechanisms have helped understand many processes and coupled events...
October 7, 2016: Chemical Research in Toxicology
Frank J Byrne, Matthew P Daugherty, Elizabeth E Grafton-Cardwell, James A Bethke, Joseph G Morse
BACKGROUND: Studies were conducted to evaluate uptake and retention of 3 systemic neonicotinoid insecticides, dinotefuran, imidacloprid, and thiamethoxam, in potted citrus nursery plants treated at standard label rates. Infestation of these plants placed at a field site with moderate levels of Asian citrus psyllid (ACP) was monitored for 14 weeks following treatments and insecticide residues in leaf tissue were quantified using ELISA. Bioassays were conducted using leaves harvested on various dates post-treatment to compare the efficacies of residues against adult ACP...
October 7, 2016: Pest Management Science
Richard Schmuck, Gavin Lewis
The nitro-substituted neonicotinoid insecticides, which include imidacloprid, thiamethoxam and clothianidin, are widely used to control a range of important agricultural pests both by foliar applications and also as seed dressings and by soil application. Since they exhibit systemic properties, exposure of bees may occur as a result of residues present in the nectar and/or pollen of seed- or soil-treated crop plants and so they have been the subject of much debate about whether they cause adverse effects in pollinating insects under field conditions...
October 5, 2016: Ecotoxicology
Christelle Navarro, Nadège Reymond, Nolwenn Crastes, Stéphane Bonneau
Effitix is a new broad spectrum product based on the combination of fipronil 6.1% and permethrin 54.5% in a solution for spot-on application. It has been shown to be safe and efficacious in dogs in controlling tick, flea, sandfly, and mosquito infestations in laboratory conditions. The aim of this controlled, randomised study was to assess its safety and efficacy against natural tick infestations in field conditions. One hundred eighty-two privately owned dogs were included in France and Germany: 123 dogs were treated on day 0 with the permethrin-fipronil combination (Effitix) and 59 with a permethrin-imidacloprid combination (Advantix®)...
2016: BioMed Research International
Edwin R Burgess, B H King
Behaviors and mortality of two filth fly parasitoid wasps, Spalangia endius Walker and Urolepis rufipes Ashmead, were tested in response to granular fly baits containing one of the three active ingredients (AI): Golden Malrin (methomyl), QuickBayt (imidacloprid), or Quikstrike (dinotefuran). Behavioral responses to each of the two components of the baits, the AIs and the fly attractant pheromone (Z)-9-tricosene, were also examined independently. Spalangia endius avoided contact with bait granules, regardless of bait type...
September 30, 2016: Environmental Entomology
Jun Huang, Juan Zhang, Yan Li, Jun Li, Xiao-Hua Shi
The screening of suitable insecticides is a key factor in successfully applying trunk injection technology to ornamental plants. In this study, six chemical pesticides were selected and injected into the trunks of Osmanthus fragrans to control the nettle caterpillar, Latoia lepida (Lepidoptera: Limacodidae), using a no-pressure injection system. The absorption rate of the insecticides, the leaf loss due to insect damage, and the mortality and frass amount of L. lepida larvae were evaluated after 77 and 429 days...
2016: PeerJ
Da Xiao, Jing Zhao, Xiaojun Guo, Hongying Chen, Mengmeng Qu, Weigang Zhai, Nicolas Desneux, Antonio Biondi, Fan Zhang, Su Wang
The seven-spot ladybird beetle, Coccinella septempunctata, is a major natural enemy of aphids in the field and in greenhouses in China and is part of integrated pest management (IPM). Imidacloprid, a highly efficient insecticide that not only kills aphids at lethal concentrations, but also can cause various sublethal effects in nontarget organisms. To strengthen IPM and its sustainability, it is important assessing possible side effects on natural enemies. When the effects of sublethal concentrations (LC5 and 10%LC5) of imidacloprid on C...
September 26, 2016: Ecotoxicology
Ping-Li Dai, Hui-Ru Jia, Cameron J Jack, Li-Li Geng, Feng Liu, Chun-Sheng Hou, Qing-Yun Diao, James D Ellis
The cry1Ie gene may be a good candidate for the development of Bt maize because over-expression of Cry1Ie is highly toxic to Lepidopteran pests such as Heliothis armigera Hübner and Ostrinia furnacalis Guenée. The Bt cry1Ie gene also has no cross resistance with other insecticidal proteins such as Cry1Ab, Cry1Ac, Cry1Ah, or Cry1F. Chinese honey bees (Apis cerana cerana) are potentially exposed to insect-resistant genetically modified (IRGM) crops expressing Cry1Ie toxin via the collection of IRGM crop pollen...
September 26, 2016: Journal of Economic Entomology
Qi Shu, Limin Wang, Hui Ouyang, Wenwen Wang, Fengquan Liu, Zhifeng Fu
A novel bifunctional antibody (BfAb) that could recognize methyl parathion and imidacloprid simultaneously was prepared by a hybrid hybridomas technique. Using the BfAb as the sole recognition reagent, a multiplexed immunochromatographic test strip based on a time-resolved chemiluminescence (CL) strategy was developed for quantitative detection of pesticide residues. Horseradish peroxidase (HRP) and alkaline phosphatase (ALP) were used as the CL probes to label the haptens of methyl parathion and imidacloprid, respectively...
September 17, 2016: Biosensors & Bioelectronics
Jin Miao, Dominic D Reisig, Guoping Li, Yuqing Wu
Megacopta cribraria F. (Hemiptera: Plataspidae), the kudzu bug, is an invasive insect pest of U.S. soybean. At present, insecticide application is the primary and most effective control option for M. cribraria In this study, the potential effects of sublethal and low-lethal concentrations (LC10 and LC40) of three common insecticides on key biological traits and acetylcholinesterase (AChE) activity of the treated nymphal stage of insect were assessed. The results show that the sublethal concentration of imidacloprid significantly reduced adult emergence rate of M...
2016: Journal of Insect Science
Emanuele Brianti, Ettore Napoli, Gabriella Gaglio, Luigi Falsone, Salvatore Giannetto, Fabrizio Solari Basano, Roberto Nazzari, Maria Stefania Latrofa, Giada Annoscia, Viviana Domenica Tarallo, Dorothee Stanneck, Filipe Dantas-Torres, Domenico Otranto
This study investigated the efficacy of two collars for the treatment and prevention of flea infestations. Additionally the effect of these collars on the incidence of Leishmania infantum infection as compared with a group of vaccinated dogs was evaluated. A total of 224 young dogs from private animal shelters were enrolled in April/May into four groups: G1, 55 dogs treated with 10% imidacloprid + 4.5% flumethrin collar (Seresto, Bayer Animal Health); G2, 60 dogs treated with 4% deltamethrin collar (Scalibor protector band, MSD Animal Health); G3, 54 dogs vaccinated with CaniLeish (Virbac Animal Health); and G4, 55 dogs left non-treated as controls...
September 2016: PLoS Neglected Tropical Diseases
Jing Wang, Jie Chen, Wenjuan Zhu, Jiangtao Ma, Yan Rong, Zhiqiang Cai
Chiral insecticide paichongding (IPP) is a member of cis-nitromethylene neonicotinoid insecticides used in China. IPP was the promising replacement for imidacloprid as a result of its higher activity against imidacloprid-resistant insects. Two pairs of enantiomers, RR/SS-IPP and SR/RS-IPP, were separated by preparative high-performance liquid chromatography and employed in an aqueous system to investigate their biodegradation process. In this study, the strains G1-13/G1-14 and G2-19 with effective IPP degrading capability were isolated from agricultural soils...
October 12, 2016: Journal of Agricultural and Food Chemistry
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"