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https://www.readbyqxmd.com/read/28428563/a-sublethal-dose-of-a-neonicotinoid-insecticide-disrupts-visual-processing-and-collision-avoidance-behaviour-in-locusta-migratoria
#1
Rachel H Parkinson, Jacelyn M Little, John R Gray
Neonicotinoids are known to affect insect navigation and vision, however the mechanisms of these effects are not fully understood. A visual motion sensitive neuron in the locust, the Descending Contralateral Movement Detector (DCMD), integrates visual information and is involved in eliciting escape behaviours. The DCMD receives coded input from the compound eyes and monosynaptically excites motorneurons involved in flight and jumping. We show that imidacloprid (IMD) impairs neural responses to visual stimuli at sublethal concentrations, and these effects are sustained two and twenty-four hours after treatment...
April 20, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28413730/effects-of-chronic-exposure-to-clothianidin-on-the-earthworm-lumbricus-terrestris
#2
Kate Basley, Dave Goulson
Although neonicotinoids are targeted at insects, their predominant use as a seed dressing and their long persistence in soils mean that non-target soil organisms such as earthworms are likely to be chronically exposed to them. Chronic exposure may pose risks that are not evaluated in most toxicity tests. We experimentally tested the effect of field-realistic concentrations of a commonly used neonicotinoid, clothianidin, on mortality, weight gain, and food consumption to assess the impacts of chronic exposure over four months on fitness of L...
2017: PeerJ
https://www.readbyqxmd.com/read/28402435/comparative-effect-of-three-neurotoxic-insecticides-with-different-modes-of-action-on-adult-males-and-females-of-three-tortricid-moth-pests
#3
Miguel A Navarro-Roldán, Jesús Avilla, Dolors Bosch, Joan Valls, César Gemeno
Insecticides are the dominant pest management method in fruit and vegetable crops worldwide owing to their quick effect, low cost, and relatively easy application, but they bear negative effects on human health and the environment. Insecticide mode of action (MoA), target species, and sex are variables that could affect insecticide-induced mortality. We recorded the mortality caused by three neurotoxic insecticides with different modes of action (chlorpyrifos [organophosphate, acetylcholinesterase inhibitor], λ-cyhalothrin [pyrethroid, sodium channel modulator], and thiacloprid [neonicotinoid, nicotinic acetylcholinesterase receptor agonist]) applied topically to adult males and females of three economically important tortricid species [Cydia pomonella (L...
April 11, 2017: Journal of Economic Entomology
https://www.readbyqxmd.com/read/28401732/responses-of-neonicotinoid-resistant-and-susceptible-frankliniella-fusca-life-stages-to-multiple-insecticide-groups-in-cotton
#4
Anders S Huseth, Damon A D'Ambrosio, George G Kennedy
BACKGROUND: Detection of neonicotinoid resistance in populations of tobacco thrips, Frankliniella fusca Hinds, throughout the Southeastern US has motivated an examination of alternative insecticides to control problematic infestations on seedling cotton. The objective of this study was to refine understanding of stage-specific mortality and reduced oviposition of several common insecticides (acephate, abamectin, cyantraniliprole, spinetoram, imidacloprid, imidacloprid + thiodicarb, thiamethoxam) on neonicotinoid-resistant and susceptible F...
April 12, 2017: Pest Management Science
https://www.readbyqxmd.com/read/28398497/detection-of-reduced-susceptibility-to-chlorfenapyr-and-bifenthrin-containing-products-in-field-populations-of-the-bed-bug-hemiptera-cimicidae
#5
Aaron R Ashbrook, Michael E Scharf, Gary W Bennett, Ameya D Gondhalekar
Insecticide resistance is a major impediment for effective control of Cimex lectularius L. Previous resistance detection studies with bed bugs have focused on certain pyrethroid, neonicotinoid, organochlorine, organophosphate, and carbamate insecticides. Within the pyrethroid class, resistance studies have mostly been limited to deltamethrin, lambda-cyhalothrin, and alpha- and beta-cyfluthrin. The goal of this study was to develop diagnostic concentration bioassays for assessing bed bug susceptibility levels to chlorfenapyr- and bifenthrin-containing products...
April 10, 2017: Journal of Economic Entomology
https://www.readbyqxmd.com/read/28385489/developmental-neurotoxicity-of-different-pesticides-in-pc-12-cells-in-vitro
#6
Verena Christen, Manuel Rusconi, Pierre Crettaz, Karl Fent
The detection of developmental neurotoxicity (DNT) of chemicals has high relevance for protection of human health. However, DNT of many pesticides is only little known. Furthermore, validated in vitro systems for assessment of DNT are not well established. Here we employed the rat phaeochromocytoma cell line PC-12 to evaluate DNT of 18 frequently used pesticides of different classes, including neonicotinoids, pyrethroids, organophosphates, organochlorines, as well as quaternary ammonium compounds, the organic compound used in pesticides, piperonyl butoxide, as well as the insect repellent diethyltoluamide (DEET)...
April 3, 2017: Toxicology and Applied Pharmacology
https://www.readbyqxmd.com/read/28376431/validation-of-a-quechers-method-for-analysis-of-neonicotinoids-in-small-volumes-of-blood-and-assessment-of-exposure-in-eurasian-eagle-owl-bubo-bubo-nestlings
#7
A Taliansky-Chamudis, P Gómez-Ramírez, M León-Ortega, A J García-Fernández
Neonicotinoid pesticides have gained great interest in the last years both for agricultural and domestic use. Since the information on their environmental distribution or the effects derived from exposure to ecosystems and biota is scarce, new analytical techniques are being developed for monitoring studies. In this sense, two extraction techniques based on QuEChERS (Quick, Easy, Cheap, Effective, Rugged, and Safe) methodology to detect the neonicotinoids authorised in Spain (acetamiprid, clothianidin, dinotefuran, imidacloprid, thiacloprid, nitenpyram and thiamethoxam) were adapted and compared: a) using acetate buffer (AB); and b) using citrate buffer (CB)...
April 1, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28374565/three-years-of-banning-neonicotinoid-insecticides-based-on-sub-lethal-effects-can-we-expect-to-see-effects-on-bees
#8
Tjeerd Blacquière, Jozef J M van der Steen
The 2013 EU ban of three neonicotinoids used in seed coating of pollinator attractive crops was put in place because of concern about declining wild pollinator populations and numbers of honeybee colonies. It was also concluded that there is an urgent need of good field data to fill knowledge gaps. In the meantime such data have been generated. Based on recent literature we question the existence of recent pollinator declines and their possible link with the use of neonicotinoids. Because of temporal non-coincidence we conclude that declines of wild pollinators and of honeybees are not likely caused by neonicotinoids...
April 3, 2017: Pest Management Science
https://www.readbyqxmd.com/read/28370291/postregistration-monitoring-of-pesticides-is-urgently-required-to-protect-ecosystems
#9
REVIEW
Martina G Vijver, Ellard R Hunting, Tom A P Nederstigt, Wil L M Tamis, Paul J van den Brink, Peter M van Bodegom
Current admission policies for pesticides follow a controlled experimental tiered risk assessment approach, giving results that are difficult to extrapolate to a real-world situation. Later analyses of compounds such as DDT and neonicotinoid pesticides clearly show that the actual chemical impacts frequently affect many more components of an ecosystem than a priori suggested by risk assessment. Therefore, to manage the actual risks for ecosystems imposed by manufactured compounds, it is proposed that current admission policies for chemicals be enriched by using postregistration monitoring...
April 2017: Environmental Toxicology and Chemistry
https://www.readbyqxmd.com/read/28369319/thiamethoxam-toxicity-and-effects-on-consumption-behavior-in-orius-insidiosus-hemiptera-anthocoridae-on-soybean
#10
Carolina Camargo, Thomas E Hunt, Loren J Giesler, Blair D Siegfried
Neonicotinoid residues can be present in soybean vegetative tissue, prey insects, and flower tissues, possibly making them toxic to pollinators and natural enemies. Baseline information on the toxicity of neonicotinoids to beneficial insects other than pollinators through multiple routes of insecticide exposure is limited. The objectives of this study were 1) to evaluate the toxicity of thiamethoxam to the hemipteran predator, Orius insidiosus Say, exposed to residues through treated vegetative tissue and insect prey, and 2) to evaluate the effect of thiamethoxam on the abundance of this predator species in soybean fields...
March 20, 2017: Environmental Entomology
https://www.readbyqxmd.com/read/28366004/physicochemical-evidences-on-the-sublethal-neonicotinoid-imidacloprid-interacting-with-an-odorant-binding-protein-from-the-tea-geometrid-moth-ectropis-obliqua
#11
Hongliang Li, Lei Zhao, Xiaobin Fu, Xinmi Song, Fan Wu, Mingzhu Tang, Hongchun Cui, Jizhong Yu
Nowadays the excessive usage of neonicotinoid insecticides always results in the residues in Chinese tea fields. It is not clear whether the insecticide residue at the sublethal level influence on the physiological processes of tea pests. Here, we provided the interacting evidences between neonicotinoid imidacloprid and a general odorant-binding protein, EoblGOBP2, from the tea geometrid moth, Ectropis obliqua. The interacting process was demonstrated through multiple fluorescence spectra, UV absorption spectra, circular dichroism (CD) spectra and molecular docking, etc...
April 2, 2017: Journal of Agricultural and Food Chemistry
https://www.readbyqxmd.com/read/28364194/carbon-treatment-as-a-method-to-remove-imidacloprid-from-agriculture-runoff
#12
Jennifer P Voorhees, Brian S Anderson, Bryn M Phillips, Ron S Tjeerdema
Use of neonicotinoid pesticides is increasing worldwide and there is growing evidence of surface water contamination from this class of insecticide. Due to their high solubility, traditional mitigation practices may be less effective at reducing neonicotinoid concentrations in agricultural runoff. In the current study, laboratory experiments were conducted to determine if granulated activated carbon (GAC) reduces concentrations of the neonicotinoid imidacloprid in water under simulated flow conditions. Imidacloprid was pumped through columns packed with GAC using flow rates scaled to mimic previously reported field studies...
March 31, 2017: Bulletin of Environmental Contamination and Toxicology
https://www.readbyqxmd.com/read/28363041/decline-of-game-birds-phasianus-colchicus-and-perdix-perdix-in-bavaria-a-survey-on-pathogenic-bacteria-parasites-pesticide-residues-and-influence-of-set-aside-land-and-maize-cultivation
#13
Anna Schmitz, Franz Kronthaler, Katrin Stein, Monika Rinder, Rüdiger Korbel
Due to a Europe-wide decline of grey partridge ( Perdix perdix ) and pheasant ( Phasianus colchicus ) populations, this study was conducted focusing on the county of Bavaria, south Germany. The aim was to assess the health status of game birds and identify possible causes of decline. For this purpose 203 pheasants and 11 partridges were examined during the 2011 hunting season. Pathologic examinations were conducted including examinations for parasites and bacteria. Due to public health significance, a screening for Salmonella sp...
March 2017: Journal of Zoo and Wildlife Medicine: Official Publication of the American Association of Zoo Veterinarians
https://www.readbyqxmd.com/read/28345196/flupyradifurone-effectively-manages-whitefly-bemisia-tabaci-med-hemiptera-aleyrodidae-and-tomato-yellow-leaf-curl-virus-tylcv-in-tomato
#14
Emmanouil Roditakis, Marianna Stavrakaki, Maria Grispou, Aikaterini Achimastou, Χavier Van Waetermeulen, Ralf Nauen, Anastasia Tsagkarakou
BACKGROUND: The cotton whitefly Bemisia tabaci (Gennadius) is among the most important pests of numerous crops and a vector of >100 plant viruses, causing significant crop losses worldwide. Managing the pest as well as inhibiting the transmission of major viruses such as Tomato yellow leaf curl virus (TYLCV) is of utmost importance for sustainable yields. The efficacy on both whiteflies and virus transmission of the novel systemic butenolide insecticide flupyradifurone, was investigated in this study...
March 27, 2017: Pest Management Science
https://www.readbyqxmd.com/read/28337632/comparative-toxicity-of-imidacloprid-and-thiacloprid-to-different-species-of-soil-invertebrates
#15
Cláudia de Lima E Silva, Nicola Brennan, Jitske M Brouwer, Daniël Commandeur, Rudo A Verweij, Cornelis A M van Gestel
Neonicotinoid insecticides have come under increasing scrutiny for their impact on non-target organisms, especially pollinators. The current scientific literature is mainly focused on the impact of these insecticides on pollinators and some aquatic insects, leaving a knowledge gap concerning soil invertebrates. This study aimed at filling this gap, by determining the toxicity of imidacloprid and thiacloprid to five species of soil invertebrates: earthworms (Eisenia andrei), enchytraeids (Enchytraeus crypticus), Collembola (Folsomia candida), oribatid mites (Oppia nitens) and isopods (Porcellio scaber)...
March 23, 2017: Ecotoxicology
https://www.readbyqxmd.com/read/28334296/impact-of-thiamethoxam-seed-treatment-on-growth-and-yield-of-rice-oryza-sativa
#16
S K Lanka, S Senthil-Nathan, D J Blouin, M J Stout
Neonicotinoid seed treatments are widely used in agriculture. In rice, Oryza sativa L., in the southern United States, neonicotinoid seed treatments are used to manage early-season populations of the rice water weevil, Lissorhoptrus oryzophilus Kuschel. In addition to their effects on pests, neonicotinoid seed treatments may benefit crop plants directly by increasing plant growth or altering plant responses to stresses. As part of an effort to assess the overall benefits of thiamethoxam seed treatment in rice, rice emergence, growth, and yield were evaluated...
April 1, 2017: Journal of Economic Entomology
https://www.readbyqxmd.com/read/28334290/field-evolved-resistance-of-bemisia-tabaci-hemiptera-aleyrodidae-to-carbodiimide-and-neonicotinoids-in-pakistan
#17
Mushtaq Ahmad, Rashid A Khan
The evolution of resistance to carbodiimide (a toxic metabolite of diafenthiuron) and four neonicotinoids imidacloprid, acetamiprid, thiamethoxam, and thiacloprid in the Pakistani populations of sweetpotato whitefly (Bemisia tabaci Gennadius) was monitored from 1996 to 2015 using a leaf-dip bioassay. Diafenthiuron, imidacloprid, and acetamiprid were introduced into Pakistani agriculture in mid-1990s and heavily used since then, because B. tabaci resistance and consequently control failures to conventional insecticides such as organophosphates, carbamates, and pyrethroids were widespread during the 1990s...
March 3, 2017: Journal of Economic Entomology
https://www.readbyqxmd.com/read/28334168/resistance-monitoring-for-eight-insecticides-on-the-sweetpotato-whitefly-hemiptera-aleyrodidae-in-china
#18
Shaoli Wang, Youjun Zhang, Xin Yang, Wen Xie, Qingjun Wu
The sweetpotato whitefly, Bemisia tabaci (Gennadius), is an important pest of many crops worldwide. Because control of B. tabaci still depends on the application of insecticides in China, monitoring the insecticide resistance of B. tabaci populations is essential for achieving control and for managing resistance. In this study, field populations of B. tabaci on vegetables were collected in three regions of China in 2011, 2012, and 2013. The resistance of these populations (all of which were determined to belong to biotype Q) to eight insecticides (abamectin, spinetoram, imidacloprid, thiamethoxam, acetamiprid, nitenpyram, chlorpyrifos, and bifenthrin) was assessed by the leaf-dip method...
April 1, 2017: Journal of Economic Entomology
https://www.readbyqxmd.com/read/28334064/insecticide-susceptibility-in-asian-honey-bees-apis-cerana-hymenoptera-apidae-and-implications-for-wild-honey-bees-in-asia
#19
Mika Yasuda, Yoshiko Sakamoto, Koichi Goka, Teruyoshi Nagamitsu, Hisatomo Taki
To conserve local biodiversity and ensure the provision of pollination services, it is essential to understand the impact of pesticides on wild honey bees. Most studies that have investigated the effects of pesticides on honey bees have focused on the European honey bee (Apis mellifera (Hymenoptera: Apidae)), which is commonly domesticated worldwide. However, the Asian honey bee (Apis cerana) is widely distributed throughout Asia, and toxicity data are lacking for this species. This study aimed to fill this important knowledge gap...
April 1, 2017: Journal of Economic Entomology
https://www.readbyqxmd.com/read/28334022/effects-of-clothianidin-on-aquatic-communities-evaluating-the-impacts-of-lethal-and-sublethal-exposure-to-neonicotinoids
#20
Jesse C Miles, Jessica Hua, Maria S Sepulveda, Christian H Krupke, Jason T Hoverman
The widespread usage of neonicotinoid insecticides has sparked concern over their effects on non-target organisms. While research has largely focused on terrestrial systems, the low soil binding and high water solubility of neonicotinoids, paired with their extensive use on the landscape, puts aquatic environments at high risk for contamination via runoff events. We assessed the potential threat of these compounds to wetland communities using a combination of field surveys and experimental exposures including concentrations that are representative of what invertebrates experience in the field...
2017: PloS One
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