Results:
33 publication requests found.
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Using the honey bee (Apis mellifera L.) cell line, AmE-711, to evaluate pesticide toxicity
Pesticides have been identified as a leading contributor to poor performance and elevated mortality of honey bee colonies in many parts of the world. Exposure of honey bees to pesticides may occur in and around treated landscapes, but also within the hive environment, where pesticide residues may ac...
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Evaluation of predrying steps, cadmium, and pesticide residues on dried powders from romaine lettuce outer and heart leaves
Compared to Iceberg lettuce, Romaine lettuce has equal carbohydrate content, double the phenolic compounds, three times the vitamin C, and four times the carotenoids and chlorophyll. Depending on the part of lettuce, these nutritional components may vary substantially. For example, full size outer l...
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Honey bee (Apis mellifera) exposure to pesticide residues in nectar and pollen in urban and suburban environments from four regions of the United States
The risk of honey bee (Apis mellifera L.) exposure to pesticide residues while foraging for nectar and pollen is commonly explored in the context of agroecosystems. However, pesticides are also used in urban and suburban areas for vegetation management, vector control, and the management of ornament...
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Pesticide risk to managed bees during blueberry pollination is primarily driven by off-farm exposures
When managed bee colonies are brought to farms for crop pollination they can be exposed to pesticide residues. Quantifying the hazard posed by these exposures can indicate which pesticides are of the greatest concern and helps focus efforts to reduce exposure. To estimate the hazard from pesticides ...
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Effect of residual pesticides in recycled nursery runoff on growth and physiology of six ornamental shrubs
Nursery runoff may contain pesticide residues, which, if released off-site, could impair surrounding ecosystems. As a solution, nursery growers can retain runoff water on-site and recycle retained water to irrigate plants. However, concerns related to potential phytotoxicity caused by residual pesti...
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On-site evaluation of the effects of carbonaceous amendments on the bioavailability of aged organochlorine pesticide residues in soil
Reducing the bioavailability of persistent organic contaminants in soil by incorporating carbonaceous material (CM) has been investigated and confirmed by numerous laboratory studies. However, the efficacy of these methods under more complex field conditions needs exploration. We conducted an 18-mon...
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Ultraviolet-C (UV-C) for disease and pest management and automating UV-C delivery technology for strawberry
Alternative disease and pest management strategies are needed due to increased resistance by strawberry pathogens and arthropod pests to currently used synthetic pesticides and increasing consumer demands for fruit without pesticide residues. Thus, novel approaches that are ecologically sound, sust...
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Developing a multi-spectral NIR LED-based instrument for detection of pesticide residues containing chlorpyrifos-methyl in rough, brown and milled rice
To comply with maximum residue limits (MRLs) for the insecticide chlorpyrifos-methyl in rice, slow and expensive lab-based procedures are currently used. Recently the use of a commercial near infrared reflectance (NIR) instrument (Perten DA7200) was shown by the authors to provide good quantitative ...
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Validation of a high-Throughput method for analysis of pesticide residues in hemp and hemp products
Hemp has been an agricultural commodity for millennia, and it has been undergoing a resurgence in interest and production due to its high content of cannabinoids, protein, fiber and other ingredients. For legal possession and use throughout the USA, hemp and hemp products must have delta-9-tetrahyd...
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A review of pesticide fate and transport simulation at watershed level using SWAT: Current status and research concerns
The application of pesticides in agriculture is a widely-used way to alleviate pest stresses. However, it also introduces various environmental concerns due to the offsite movement of pesticide residues towards receiving water bodies. While the application of process-based modeling approaches can pr...
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NIR spectroscopy detects chlorpyrifos-methyl pesticide residues in rough, brown, and milled rice
A rapid technique that uses near-infrared reflectance (NIR) spectroscopy for simultaneous qualitative and quantitative determination of the presence of varying concentrations of chlorpyrifos-methyl in bulk samples of rough, brown, and milled rice was established. Five rice varieties, free of pestici...
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Insecticide and Fungicide Residues Following a Foliar Application in Cotton and Soybean
The residual control of target pests and impacts on non-target arthropods, including pollinators, is affected by the persistence of pesticides on plants following an application. To that end, a study was done in Tennessee to investigate the levels of pesticide residues on cotton, Gossypium hirsutum ...
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Residual herbicide concentrations in on-farm water storage-tailwater recovery systems: preliminary assessment
On-farm water storage-tailwater recovery systems reduce groundwater usage and intercept agrochemical loads, but pesticide residue dynamics in these systems are less understood. This study monitored concentrations of seven herbicides in seven Northeast Arkansas tailwater recovery systems from April 2...
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Assessment of test portion sizes after sample comminution with liquid nitrogen in the high-throughput analysis of pesticide residues in fruits and vegetables
In this study, sample processing of bulk commodities using an efficient one-step comminution procedure with liquid nitrogen (LN2) was devised and assessed in the analysis of pesticide residues in fruits and vegetables. The LN2 was added to the fresh samples from a tank by opening a valve, and the s...
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Traces of Imidacloprid induce precocious foraging and reduce foraging performances in honey bees
There is increasing worldwide concern about the impacts of pesticide residues on honey bees and bee colony survival, but how sublethal effects of pesticides on bees might cause colony failure remains highly controversial, with field data giving very mixed results. To explore how trace levels of the ...
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Cryogenic sample processing with liquid nitrogen for effective and efficient monitoring of pesticide residues in foods and feeds
When monitoring hundreds of pesticides in food and feed, the comminution step is equally crucial as any other to achieve valid results. However, sample processing is often underestimated in its importance and practical difficulty to produce consistent test portions for analysis. The scientific lit...
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Long-term dynamics of honey bee colonies following exposure to chemical stress
Pesticide residues have been linked to reduced bee health and increased honey bee colony failure. Most research to date has investigated the role of pesticides on individual honey bees, and it is still unclear how trace levels of pesticides change colony viability and productivity over seasonal time...
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Modeling pesticide fate and transport at watershed scale using the soil & water assessment tool: general applications and mitigation strategies
Pesticide residue runoff to surface water is of great concern to local stakeholders who seek to preserve or achieve good water quality objectives. The Soil and Water Assessment Tool (SWAT) has been widely used to assess many environmental problems related to water resources and nonpoint-source pollu...
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Pesticide residues in conventionally and organically managed apiaries in south and north Florida
Honey bee (Apis mellifera) populations in the United States have been declining for many years. The newest disease called “Colony Collapse Disorder (CCD)” has concerned scientists, governmental agencies, non-profit organizations, and the general public. CCD may be attributed to pests and pathogens, ...
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Possibilities and limitations of isocratic fast liquid chromatography-tandem mass spectrometry analysis of pesticide residues in fruits and vegetables
Currently, state-of-the-art analytical methods for multiclass, multiresidue monitoring of pesticides in foods use ultrahigh performance liquid chromatography – tandem mass spectrometry (UHPLC-MS/MS) for analysis of LC-amenable analytes. UHPLC-MS/MS for >100 pesticides typically takes 10 min per inj...
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