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19 results for “imidacloprid”
Imidacloprid exposure through soil and its effect on Anthophora plumipes, a ground-nesting bee
<p>These are the raw data files is associated with the manuscript titled "Neonicotinoid exposure through soil and its effect on Anthophora plumipes, a ground-nesting bee".</p>
R code for: Following regulation, imidacloprid persists and flupyradifurone increases in non-target wildlife
<p>After regulation of pesticides, determination of their persistence in the environment is an important indicator of effectiveness of these measures. We quantified concentrations of two types of systemic insecticides: neonicotinoids (imidacloprid, acetamiprid, clothianidin, thiacloprid, and thiamethoxam) and butenolides (flupyradifurone), in off-crop non-target media of hummingbird cloacal fluid, honey bee (<em>Apis mellifera</em>) nectar and honey, and wildflowers before and after regulation of imidacloprid on highbush blueberries in Canada in April 2021. We found that mean total pesticide load increased in hummingbird cloacal fluid, nectar, and flower samples following imidacloprid regulation. On average, we did not find evidence of a decrease in imidacloprid concentrations after regulation. However, there were some decreases, some increases and other cases with no changes in imidacloprid levels depending on the specific media, time point of sampling and site type. At the same time, we found an overall increase in flupyradifurone, acetamiprid, thiamethoxam and thiacloprid, but no change in clothianidin concentrations. In particular, flupyradifurone concentrations observed in biota sampled near to agricultural areas increased by 2-fold in honey bee nectar, 7-fold in hummingbird cloacal fluid, and 8-fold in flowers after the 2021 imidacloprid regulation. The highest residue detected in this study was flupyradifurone at 665 ng/mL (PPB) in honey bee nectar. Mean total pesticide loads were highest in honey samples (84 ± 10 PPB) followed by nectar (56 ± 7 PPB), then hummingbird cloacal fluid (1.8 ± 0.5 PPB), and least, flowers (0.51 ± 0.06 PPB). Our results highlight that limited regulation of imidacloprid does not immediately reduce residue concentrations while other systemic insecticides, possibly replacement compounds, concurrently increase in wildlife.</p>
Fig. 1 in Hormesis in the brown citrus aphid, Toxoptera citricida (Kirkaldy) (Hemiptera: Aphididae) exposed to sublethal doses of imidacloprid
Fig. 1. Mean number of F1 (A) and F2 (B) nymphs per female Toxoptera citricida treated with a sublethal concentration (0.1 ng per µL) of imidacloprid compared with water control at 3 intervals afer emergence. *Indicates significant differ- ence between control treatment (P <0.05, Student's t-test).
R code for: Following regulation, imidacloprid persists and flupyradifurone increases in non-target wildlife
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Supplemental data Effects of imidacloprid exposure on honey bee colony growth and activity
To better understand how exposure to a low (5 ppb) concentration of imidacloprid affects honey bee colonies we conducted five field experiments involving a total of 54 bee colonies. In each experiment, bee colonies in one treatment group were fed sugar syrup adulterated with 5ppb imidacloprid over six weeks, and colonies in the other group were fed unadulturated sugar syrup over the same time period. Treatments were intended to simulate nectar collection by the colonies. No commercial agriculture existed within 10 km of the sites. We collected data from hive assessments, including adult bee mass and mass of food resources, and the total surface area of capped brood; and we collected data from sensors, including continuous hive weight, internal temperature and, for two years of the study, internal CO2 concentration. We measured Varroa mite fall before and after treatment each year of the study, and for 3 years of the study we measured the dry weight of newly-emerged adult bees.
Absorption, translocation and distribution of imidacloprid in wheat
<p>The absorption, translocation and distribution of imidacloprid in wheat under hydroponic conditions were determined by LC-MS-MS. The results showed that imidacloprid could be absorbed by wheat, and imidacloprid was detected in both the roots and leaves of wheat.</p>
Raw data for the submitted manuscript: The Effect of Clay Type on the Toxicity of Carbendazim and Imidacloprid to the Earthworm Eisenia andrei in Artificial Soils
<p>Raw data obtained from toxicity tests with the earthworm <em>Eisenia </em><em>andrei </em>exposed for 56 days to carbendazim and imidacloprid in artificial soils created with kaolin and bentonite clay. Tests were performed following OECD guideline 222. The file includes data on earthworm starting and ending weights, survival, and reproduction.</p>
Data for: The Neonicotinoid Imidacloprid Impairs Sucrose Solution Consumption, Learning and Locomotor Activity Levels In Bumblebees (Bombus Terrestris)
<p># README</p> <p>The following files are for creating the figures from the paper: </p> <p>## `plot_flowervisits_nectar.ipynb`</p> <p>Jupyter notebook that creates the figures concerning flower visits, nectar consumption and the proportion of empty honeypots.</p> <p>## `plot_activity.py`</p> <p>Python script that takes trajectory fragments from video analysis and computes the locomotor activity level through making histograms of bumblebee speeds. Makes two figures that are equivalent to the figure on locomotor activity in the paper.</p> <p>## `statistical analysis.py`</p> <p>R markdown notebook that performs all the hypothesis testing for the paper.</p> <p>## Data</p> <p>These files contain the data, and are located in the folder called `data`. </p> <p>`activity/activityproportions.csv` contains the computed locomotor activity level for easy plotting.</p> <p>`boldata/boldata.csv` contains data about the nectar bag weight before and after experiment and the counted number of empty and full honeypots. Used by `plot_flowervisits_nectar.ipynb`</p> <p>`flower_data/flowerData.csv` contains the computed number of visits to blue and yellow flowers per hive for easy plotting.</p> <p>`humlevideo_production/*/traj*_trajectories*.csv` contains constructed trajectories from all experiments seen from both cameras. These are being used by the script `plot_activity`.</p> <p>`humlevideo_production/*/traj*.json` contains data about the occurence of bees on flowers in each frame in each experiment.</p> <p>`landinger_csv` contains data about landings, that have been extracted from the `humlevideo_production/*/traj*.json` files. Used by `plot_flowervisits_nectar.ipynb`.</p> <p> </p>
Data from: Sugar content of diet does not buffer against chronic oral imidacloprid exposure in the alfalfa leafcutting bee, Megachile rotundata (Hymenoptera: Megachilidae)
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Bioaccumulation of the pesticide Imidacloprid in stream organisms and sublethal effects in salamanders in West Virginia
<p>Dataset for the article "Bioaccumulation of the Pesticide Imidacloprid in Stream Organisms and Sublethal Effects on Salamanders." Contains imidacloprid and metabolite concentrations for Desmognathus spp., benthic macroinvertebrates, and stream water. Also contains corticosterone concentration data for Desmognathus spp. and body condition indices for 5 species of stream salamander in relation to water imidacloprid concentrations.Dataset for the article "Bioaccumulation of the Pesticide Imidacloprid in Stream Organisms and Sublethal Effects on Salamanders." Contains imidacloprid and metabolite concentrations for Desmognathus spp., benthic macroinvertebrates, and stream water. Also contains corticosterone concentration data for Desmognathus spp. and body condition indices for 5 species of stream salamander in relation to water imidacloprid concentrations.</p>
Bioaccumulation of the pesticide Imidacloprid in stream organisms and sublethal effects in salamanders in West Virginia
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Data from: Interaction between Varroa destructor and imidacloprid reduces flight capacity of honeybees
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Molecular bases of P450-mediated resistance to the neonicotinoid insecticide imidacloprid in the mosquito Ae. aegypti
GEO Series GSE174009. Aedes aegypti. 9 samples. Type: Expression profiling by high throughput sequencing.
Alteration of gene expression profile of cerebelllar neuron-enriched cultures from neonatal rats by nicotine, acetamiprid, or imidacloprid treatment [imidacloprid]
GEO Series GSE80653. Rattus norvegicus. 12 samples. Type: Expression profiling by array.
Alteration of gene expression profile of cerebelllar neuron-enriched cultures from neonatal rats by nicotine, acetamiprid, or imidacloprid treatment
GEO Series GSE80656. Rattus norvegicus. 36 samples. Type: Expression profiling by array.
Transcriptional profiling of a novel mutant resistant to imidacloprid and DDT
GEO Series GSE28560. Drosophila melanogaster. 2 samples. Type: Expression profiling by high throughput sequencing.
Alteration of gene expression profile of cerebelllar neuron-enriched cultures from neonatal rats by nicotine, acetamiprid, or imidacloprid treatment [nicotine]
GEO Series GSE80638. Rattus norvegicus. 12 samples. Type: Expression profiling by array.
Alteration of gene expression profile of cerebelllar neuron-enriched cultures from neonatal rats by nicotine, acetamiprid, or imidacloprid treatment [acetamiprid]
GEO Series GSE80652. Rattus norvegicus. 12 samples. Type: Expression profiling by array.
Long-term persistence of trunk injected imidacloprid in plant tissues and its impact on Cameraria ohridella
<p>Raw data for the manuscript "Long-term persistence of trunk injected imidacloprid in plant tissues and its impact on <em>Cameraria ohridella</em>"</p>
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