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https://www.readbyqxmd.com/read/28345791/trichoscopic-diagnosis-of-cutaneous-pelodera-strongyloides-infestation-in-a-dog
#1
Rareş G M Căpitan, Chiara Noli
BACKGROUND: Pelodera strongyloides infestation has rarely been reported in dogs. It is a saprophytic free-living nematode, found in moist decaying organic matter, whose L3 larval stages occasionally can invade the skin of dogs and humans. Larvae penetrate the follicular infundibula causing an erythematous and pruritic dermatitis. The disease is usually diagnosed by deep skin scraping or histopathology, with large numbers of parasites readily identified in hair follicles. CASE REPORT: Pelodera strongyloides dermatitis was diagnosed in a six-year-old mixed breed dog presenting with alopecia, erythema and severe pruritus on the ventrum and limbs...
March 27, 2017: Veterinary Dermatology
https://www.readbyqxmd.com/read/28342998/field-evaluation-of-cucurbit-yellow-stunting-disorder-virus-transmission-by-bemisia-tabaci
#2
S J Castle, J P Palumbo, P Merten
Cucurbit yellow stunting disorder virus (CYSDV) is a whitefly-transmitted Crinivirus (Closteroviridae) that impacts melon production in many parts of the world including the USA. It has been responsible for melon crop loss in the southwestern U.S. since 2006 when it was first identified. Control strategies have revolved mainly around chemical control, but research to identify suitable products and approaches to implementing them has lagged. The current study investigated the performance of four systemic insecticides in the field while concurrently tracking CYSDV disease progression after controlled and natural whitefly inoculation of young melon plants...
March 22, 2017: Virus Research
https://www.readbyqxmd.com/read/28340790/on-line-in-syringe-sugaring-out-liquid-liquid-extraction-coupled-with-hplc-ms-ms-for-the-determination-of-pesticides-in-fruit-and-berry-juices
#3
Irina Timofeeva, Andrey Shishov, Daria Kanashina, Daria Dzema, Andrey Bulatov
A fully automated method for the determination of pesticides (malathion, diazinon, imidacloprid and triadimefon) in fruit and berry juices has been developed. In the current study, the on-line in-syringe sugaring-out liquid-liquid extraction was successfully combined with a HPLC-MS/MS system for the first time. The procedure assumes the liquid-liquid extraction of analytes in water-miscible organic solvent acetonitrile followed by phase separation using glucose as sugaring-out reagent. After the phase separation in a syringe of a flow system, the extract containing pesticides was injected into the HPLC-MS/MS system...
May 15, 2017: Talanta
https://www.readbyqxmd.com/read/28337632/comparative-toxicity-of-imidacloprid-and-thiacloprid-to-different-species-of-soil-invertebrates
#4
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/28334350/relative-susceptibility-of-phyllocnistis-citrella-lepidoptera-gracillariidae-to-commonly-used-insecticides-in-maharashtra-india
#5
Anjitha George, C N Rao, Sonali Ghike, Vijay Dhengre
Foliar application of insecticides has been the most commonly followed practice to manage Phyllocnistis citrella Stainton in nurseries and flush leaves in citrus groves. Leaf dip bioassays were conducted against insecticides, viz., acephate 75SP, dimethoate 30EC, abamectin 1.9EC, fenvalerate 20EC, imidacloprid 17.8SL, and thiamethoxam 25WG, and were tested against P. citrella larvae for their susceptibility. Among six insecticides tested on second-instar P. citrella larvae collected from Nagpur mandarin/acid lime cultivars during 2013-2016, abamectin was the most toxic insecticide for the initial year (LC50 values ranged from 20...
March 3, 2017: Journal of Economic Entomology
https://www.readbyqxmd.com/read/28334316/insecticide-resistance-of-several-field-collected-german-cockroach-dictyoptera-blattellidae-strains
#6
Xiaoyan Wu, Arthur G Appel
German cockroaches, Blattella germanica (L.), remain one of the most difficult indoor insect species to control because of its ability to develop resistance to insecticides. The toxicity and resistance levels of five technical-grade insecticides (permethrin, chlorpyrifos, propoxur, imidacloprid, and fipronil) were determined for adult males of seven strains of the German cockroach, a laboratory-reared susceptible strain (S) and six field-collected strains (B, D, E, G, H, and I). Using topical application methods, fipronil was the most toxic insecticide to all seven strains...
March 8, 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
#7
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/28334270/development-of-diagnostic-insecticide-concentrations-and-assessment-of-insecticide-susceptibility-in-german-cockroach-dictyoptera-blattellidae-field-strains-collected-from-public-housing
#8
Mahsa Fardisi, Ameya D Gondhalekar, Michael E Scharf
Insecticide resistance in German cockroaches (Blattella germanica (L.)) has been a barrier to effective control since its first documentation in the 1950s. A necessary first step toward managing resistance is to understand insecticide susceptibility profiles in field-collected strains so that active ingredients (AIs) with lowest resistance levels can be identified. As a first step in this study, diagnostic concentrations (DCs) were determined for 14 insecticide AIs based on lethal concentrations that killed 99% or 90% of the individuals from a susceptible lab strain (JWax-S)...
March 20, 2017: Journal of Economic Entomology
https://www.readbyqxmd.com/read/28334249/lethal-and-sublethal-effects-of-some-chemical-and-biological-insecticides-on-tuta-absoluta-lepidoptera-gelechiidae-eggs-and-neonates
#9
Z Nozad-Bonab, M J Hejazi, Sh Iranipour, M Arzanlou
Tuta absoluta (Meyrick) is one of the serious pests of tomatoes. This study was conducted to evaluate the effects of some chemical and biological insecticides on T. absoluta . The insecticides tested were diazinon, dichlorvos, chlorantraniliprole, deltamethrin, acetamiprid, imidacloprid, spinosad, abamectin, indoxacarb, Bacillus thuringiensis Berliner, Beauveria bassiana (Balsamo) Vuillemin, and Metarhizium anisopliae (Metschnikoff) Sorokin. Sublethal effects for the most effective insecticides tested, namely, abamectin, spinosad, chlorantraniliprole, and indoxacarb were assessed, and life table parameters were calculated...
March 13, 2017: Journal of Economic Entomology
https://www.readbyqxmd.com/read/28334168/resistance-monitoring-for-eight-insecticides-on-the-sweetpotato-whitefly-hemiptera-aleyrodidae-in-china
#10
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...
March 1, 2017: Journal of Economic Entomology
https://www.readbyqxmd.com/read/28334150/monitoring-trends-in-insecticide-resistance-of-field-populations-of-sogatella-furcifera-hemiptera-delphacidae-in-guizhou-province-china-2012-2015
#11
Jian-Xue Jin, Dao-Chao Jin, Wen-Hong Li, Ying Cheng, Feng-Liang Li, Zhao-Chun Ye
Sogatella furcifera (Horváth) is a migratory insect that is one of the most important pest species on rice in many Asian countries. Control of S. furcifera (Hemiptera: Delphacidae) primarily depends on the use of chemical insecticides, and with this extensive reliance on pesticides, determining the degree of resistance of S. furcifera populations to the chemicals used for its control is essential. In this study, the resistance level to six conventional insecticides in five populations of S. furcifera from Guizhou Province was monitored yearly using the rice-stem dipping method in 2012-2015 to precisely understand current resistance levels and to estimate trends in the development of insecticide resistance in S...
February 22, 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
#12
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
https://www.readbyqxmd.com/read/28322347/chronic-exposure-to-a-neonicotinoid-increases-expression-of-antimicrobial-peptide-genes-in-the-bumblebee-bombus-impatiens
#13
William R Simmons, David R Angelini
Bumblebees are important pollinators in wild and agricultural settings. In recent decades pollinator declines have been linked to the effects of increased pesticide use and the spread of disease. Synergy between these factors has been suggested, but no physiological mechanism has been identified. This study examines the connection between neonicotinoid exposure and innate immune function in the bumblebee Bombus impatiens, which is an important wild and commercial pollinator in eastern North America. Experimental colonies in the field were enclosed and provided pollen and sugar syrup containing an agriculturally relevant range of imidacloprid concentrations...
March 21, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28315331/sublethal-doses-of-neonicotinoid-imidacloprid-can-interact-with-honey-bee-chemosensory-protein-1-csp1-and-inhibit-its-function
#14
Hongliang Li, Jing Tan, Xinmi Song, Fan Wu, Mingzhu Tang, Qiyun Hua, Huoqing Zheng, Fuliang Hu
As a frequently used neonicotinoid insecticide, imidacloprid can impair the chemoreceptive behavior of honey bees even at sublethal doses, while the physiochemical mechanism has not been further revealed. Here, multiple fluorescence spectra, thermodynamic method, and molecular docking were used to study the interaction and the functional inhibition of imidacloprid to the recombinant CSP1 protein in Asian honey bee, Apis cerana. The results showed that the fluorescence intensity (λem = 332 nm) of CSP1 could be significantly quenched by imidacloprid in a dynamic mode...
March 14, 2017: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/28299835/multiple-atp-binding-cassette-transporters-are-involved-in-insecticide-resistance-in-the-small-brown-planthopper-laodelphax-striatellus
#15
H Sun, J Pu, F Chen, J Wang, Z Han
ATP-binding cassette (ABC) transporters are membrane-bound proteins involved in the movement of various substrates, including drugs and insecticides, across the lipid membrane. Demonstration of the role of human ABC transporters in multidrug resistance has led to speculation that they might be an important mechanism controlling the fate of insecticides in insects. However, the role of ABC transporters in insects remains largely unknown. The small brown planthopper, Laodelphax striatellus Fallén, has developed resistance to most of the insecticides used for its control...
March 16, 2017: Insect Molecular Biology
https://www.readbyqxmd.com/read/28296068/assessment-of-insecticide-risk-to-human-health-in-groundwater-in-northern-china-by-using-the-china-pearl-model
#16
Yue Geng, Jing Ma, Ruize Zhou, Ran Jia, Chongjiu Li, Xiaodong Ma
BACKGROUND: Insecticides are extensively used in China and may leach to groundwater, which is used as a source of drinking water in Northern China. However, the risk of insecticide leaching to groundwater and the subsequent risk to human health caused by the consumption of insecticide-contaminated drinking water remain unclear. RESULTS: A total of 336 predicted environmental concentrations (PECs) were simulated for 32 commonly-used insecticides, and 171 PECs were calculated for 20 metabolites in 6 agricultural dry-land scenario locations of Northern China with 8 target crops...
March 15, 2017: Pest Management Science
https://www.readbyqxmd.com/read/28296046/imidacloprid-is-degraded-by-cyp353d1v2-a-cytochrome-p450-over-expressed-in-resistant-strain-of-laodelphax-striatellus
#17
Mohammed Esmail Abdalla Elzaki, Mohammad Asaduzzaman Miah, Min Wu, Haomiao Zhang, Jian Pu, Ling Jiang, Zhaojun Han
BACKGROUND: Cytochrome P450s are associated with metabolizing of a wide range of compounds including insecticides. CYP353D1v2 has been found over-expressed in the imidacloprid-resistant strain of Laodelphax striatellus. Thus, this study was conducted to express CYP353D1v2 in Sf9 cell as a recombinant protein, to assess its ability in metabolizing imidacloprid. RESULTS: Western blot and carbon monoxide difference spectra analysis indicated that the intact CYP353D1v2 protein has been successfully expressed in insect cell Sf9...
March 10, 2017: Pest Management Science
https://www.readbyqxmd.com/read/28287906/the-effect-of-tio2-nanoparticles-and-uv-irradiation-on-photocatalytic-degradation-of-imidaclopride
#18
Hadi Ahmari, Saeed Zeinali Heris, Mohammad Hassanzadeh Khayyat
Imidaclopride is an insecticide widely used for pest control in agriculture around the world. It acts on the central nervous system of insects, while posing lower toxicity to mammals. This is an organic material made of Pyridinium, Dihydroimidazol and Nitramide. This structure poses a threat to the environment and humans. Until now, different types of methods have been used for elimination of this organic pollution. Recently, advance oxidation processes (AOPs) is presented as a proposed method to remove this organic pollution...
March 13, 2017: Environmental Technology
https://www.readbyqxmd.com/read/28283291/trial-of-solar-heating-methods-solarization-and-biosolarization-to-reduce-persistence-of-neonicotinoid-and-diamide-insecticides-in-a-semiarid-mediterranean-soil
#19
Nuria Vela, José Fenoll, Ginés Navarro, Isabel Garrido, Simón Navarro
This paper reports the use of solar heating techniques, solarization (S) and biosolarization (BS) as a strategy for the environmental restoration of soils containing neonicotinoid, acetamiprid (AC), imidacloprid (IM) and thiamethoxam (TH), and diamide, chlorantraniliprole (CL) and flubendiamide (FB) insecticide residues. For this, a semiarid Mediterranean soil (Haplic calcisol) was covered with low-density polyethylene (LDPE) during the hot season, to raise the maximal soil temperatures. Compost from sheep manure (CSM), meat-processing waste (MPW) and sugar beet vinasse (SBV) were used as organic wastes...
March 7, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28280585/agrochemical-synergism-imposes-higher-risk-to-neotropical-bees-than-to%C3%A2-honeybees
#20
Hudson V V Tomé, Gabryele S Ramos, Micaele F Araújo, Weyder C Santana, Gil R Santos, Raul Narciso C Guedes, Carlos D Maciel, Philip L Newland, Eugênio E Oliveira
Bees are key pollinators whose population numbers are declining, in part, owing to the effects of different stressors such as insecticides and fungicides. We have analysed the susceptibility of the Africanized honeybee, Apis mellifera, and the stingless bee, Partamona helleri, to commercial formulations of the insecticides deltamethrin and imidacloprid. The toxicity of fungicides based on thiophanate-methyl and chlorothalonil were investigated individually and in combination, and with the insecticides. Results showed that stingless bees were more susceptible to insecticides than honeybees...
January 2017: Royal Society Open Science
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