Pesticide Fate Research Group (PFRG) Active
Pesticides are used in both agricultural and urban settings to manage unwanted plants, insects, fungi, and other pests. However, these substances and their breakdown products can move beyond their intended application sites through various means, ending up in areas where they weren't meant to be. This movement can happen via the air, through water (both surface and groundwater), and by sticking to soil or sediment particles. Depending on how long they stick around and how concentrated they are, pesticides can harm aquatic creatures and people. To grasp the risks associated with pesticide exposure, it's crucial to comprehend how these chemicals move and behave in the environment.
Neonicotinoid Seed Treatment Study
Neonicotinoids are a new class of insecticides chemically related to nicotine. Like nicotine, they act on receptors in the nerves and are generally much more toxic to insects, than they are to mammals and other higher organisms. Their use has increased rapidly over the last decade, driven in large part by their use for seed coating.
USGS Environmental Health Science
In the Pesticide Fate Research Group Laboratory, we see a scientist using an instrument to identify unknown organic compounds in environmental samples. It gives exact masses of chemical compounds, allowing scientists to decipher the elemental composition of a compound, and the chemical structure, without ever having known what they were looking for in the first place.
Organic Chemistry Research Laboratory
The Organic Chemistry Research Laboratory is comprised of multidisciplinary scientists with experiences in method development, sample collection, sample preparation, and instrumental analysis. The lab is equipped with instrumentation for the identification and quantification of trace level organic contaminants in water, sediment, soil, plants, biota, etc.
The Pesticide Fate Research Group (PFRG) operates within the USGS California Water Science Center, focusing on evaluating the occurrence, fate, and transport of current-use pesticides and organic contaminants in both aquatic and terrestrial environments across California and the nation. Comprising chemists, hydrologists, and physical scientists with specialized expertise, the PFRG engages in all stages of research, from field study design and sampling to analytical method development across various matrices such as water, sediment, plants, and biota. Utilizing cutting-edge instrumentation, the group conducts sample analysis, interprets data, manages information, and communicates findings to diverse stakeholders.
While pesticides represent the primary research domain, the PFRG's capabilities extend to investigating a broader spectrum of organic chemicals, including disinfection by-products, substances linked to cannabis production, alkylphenols, and others. By leveraging their skills and analytical prowess, the group addresses a wide array of environmental contaminants.
Establishing collaborative partnerships with state agencies, academic researchers, and fellow scientists within the USGS and other federal entities is central to the PFRG's approach. Funding for projects stems from various sources, including USGS mission areas such as Environmental Health (including the Toxic Substances Hydrology Program and Contaminant Biology Program), Ecosystems, and Water, as well as support from other USGS Water Science Centers and cooperating entities like the California State Department of Pesticide Regulation, Water Resources Control Board, Department of Water Resources, among others.
Below are other science projects associated with this project.
Data releases in ScienceBase are primarily focused on raw and processed data resulting from various research activities. The primary goal of these data releases is to make the data collected by USGS scientists accessible and usable. This open data approach facilitates transparency, reproducibility, and further research by allowing others to analyze, reinterpret, or build upon the original data.
USGS publications serve as authoritative sources of information for scientists, policymakers, educators, and the general public, contributing significantly to our understanding of the earth's processes, landscape changes, resource management, and environmental health. The accessibility of these publications ensures that the valuable insights and findings from the USGS are widely available.
Dissolved pesticide concentrations in the lower Sacramento River and its source waters, California, 2016
Fate and transport of nitrapyrin in agroecosystems: Occurrence in agricultural soils, subsurface drains, and receiving streams in the Midwestern US
Exploring the amphibian exposome in an agricultural landscape using telemetry and passive sampling
Applications of the California pesticide use reporting database in more than 25 years of U.S. Geological Survey hydrological studies
Detections of current-use pesticides at 12 surface water sites in California during a 2-year period beginning in 2015
Pesticide inputs to the Sacramento–San Joaquin Delta, 2015–16: Results from the Delta Regional Monitoring Program
Environmental risks and challenges associated with neonicotinoid insecticides
Year-round presence of neonicotinoid insecticides in tributaries to the Great Lakes, USA
Leaching and sorption of neonicotinoid insecticides and fungicides from seed coatings
Occurrence of dichloroacetamide herbicide safeners and co-applied herbicides in midwestern U.S. streams
Complex mixtures of dissolved pesticides show potential aquatic toxicity in a synoptic study of Midwestern U.S. streams
Management of arthropod pathogen vectors in North America: Minimizing adverse effects on pollinators
Below are news stories associated with this project.
Below are partners associated with this project.
- Overview
Pesticides are used in both agricultural and urban settings to manage unwanted plants, insects, fungi, and other pests. However, these substances and their breakdown products can move beyond their intended application sites through various means, ending up in areas where they weren't meant to be. This movement can happen via the air, through water (both surface and groundwater), and by sticking to soil or sediment particles. Depending on how long they stick around and how concentrated they are, pesticides can harm aquatic creatures and people. To grasp the risks associated with pesticide exposure, it's crucial to comprehend how these chemicals move and behave in the environment.
Neonicotinoid Seed Treatment StudyNeonicotinoids are a new class of insecticides chemically related to nicotine. Like nicotine, they act on receptors in the nerves and are generally much more toxic to insects, than they are to mammals and other higher organisms. Their use has increased rapidly over the last decade, driven in large part by their use for seed coating.
USGS Environmental Health ScienceIn the Pesticide Fate Research Group Laboratory, we see a scientist using an instrument to identify unknown organic compounds in environmental samples. It gives exact masses of chemical compounds, allowing scientists to decipher the elemental composition of a compound, and the chemical structure, without ever having known what they were looking for in the first place.
Organic Chemistry Research LaboratoryThe Organic Chemistry Research Laboratory is comprised of multidisciplinary scientists with experiences in method development, sample collection, sample preparation, and instrumental analysis. The lab is equipped with instrumentation for the identification and quantification of trace level organic contaminants in water, sediment, soil, plants, biota, etc.
The Pesticide Fate Research Group (PFRG) operates within the USGS California Water Science Center, focusing on evaluating the occurrence, fate, and transport of current-use pesticides and organic contaminants in both aquatic and terrestrial environments across California and the nation. Comprising chemists, hydrologists, and physical scientists with specialized expertise, the PFRG engages in all stages of research, from field study design and sampling to analytical method development across various matrices such as water, sediment, plants, and biota. Utilizing cutting-edge instrumentation, the group conducts sample analysis, interprets data, manages information, and communicates findings to diverse stakeholders.
While pesticides represent the primary research domain, the PFRG's capabilities extend to investigating a broader spectrum of organic chemicals, including disinfection by-products, substances linked to cannabis production, alkylphenols, and others. By leveraging their skills and analytical prowess, the group addresses a wide array of environmental contaminants.
Establishing collaborative partnerships with state agencies, academic researchers, and fellow scientists within the USGS and other federal entities is central to the PFRG's approach. Funding for projects stems from various sources, including USGS mission areas such as Environmental Health (including the Toxic Substances Hydrology Program and Contaminant Biology Program), Ecosystems, and Water, as well as support from other USGS Water Science Centers and cooperating entities like the California State Department of Pesticide Regulation, Water Resources Control Board, Department of Water Resources, among others.
- Science
Below are other science projects associated with this project.
- Data
Data releases in ScienceBase are primarily focused on raw and processed data resulting from various research activities. The primary goal of these data releases is to make the data collected by USGS scientists accessible and usable. This open data approach facilitates transparency, reproducibility, and further research by allowing others to analyze, reinterpret, or build upon the original data.
- Publications
USGS publications serve as authoritative sources of information for scientists, policymakers, educators, and the general public, contributing significantly to our understanding of the earth's processes, landscape changes, resource management, and environmental health. The accessibility of these publications ensures that the valuable insights and findings from the USGS are widely available.
Filter Total Items: 106Dissolved pesticide concentrations in the lower Sacramento River and its source waters, California, 2016
As part of a collaborative study designed to better understand water-quality conditions in the Sacramento River, surface-water samples were collected from the lower Sacramento River and five of its tributaries and then analyzed by the U.S. Geological Survey for a suite of 162 current-use pesticides and pesticide degradates. Samples were collected in May and October 2016 at 16 sites on the SacramenAuthorsSean M. Stout, James L. Orlando, Megan McWayne-Holmes, Corey Sanders, Michelle L. HladikFate and transport of nitrapyrin in agroecosystems: Occurrence in agricultural soils, subsurface drains, and receiving streams in the Midwestern US
Nitrapyrin is a nitrification inhibitor that is co-applied with nitrogen fertilizer in agroecosystems. There is limited information on the fate of nitrapyrin after it is applied to agricultural soils. Over the course of one year (March 2016 to June 2017), 192 water samples from seven streams across Iowa and Illinois were analyzed for nitrapyrin, its metabolite 6‑chloropicolinic acid (6‑CPA), and tAuthorsEmily Woodward, Dana W. Kolpin, Wei Zheng, Nancy L Holm, Shannon M. Meppelink, Paul J. Terrio, Michelle HladikExploring the amphibian exposome in an agricultural landscape using telemetry and passive sampling
This is the first field study of its kind to combine radio telemetry, passive samplers, and pesticide accumulation in tissues to characterize the amphibian exposome as it relates to pesticides. Understanding how habitat drives exposure in individuals (i.e., their exposome), and how that relates to individual health is critical to managing species in an agricultural landscape where pesticide exposuAuthorsJennifer E. Swanson, Erin L. Muths, Clay Pierce, Stephen J. Dinsmore, Mark W. Vandever, Michelle L. Hladik, Kelly L. SmallingApplications of the California pesticide use reporting database in more than 25 years of U.S. Geological Survey hydrological studies
The U.S. Geological Survey (USGS) has been collecting data on the occurrence of pesticides in California surface and ground water since the 1970’s. The design of these studies benefited from the availability of the Pesticide Use Reporting (PUR) database of the California Department of Pesticide Regulation. Actual locations and dates of applications of active ingredient allow for effective design oAuthorsJoseph L. Domagalski, James OrlandoDetections of current-use pesticides at 12 surface water sites in California during a 2-year period beginning in 2015
Surface water samples were collected by the U.S. Geological Survey and multiple cooperators during base flow/irrigation runoff and storm runoff conditions from 12 sites throughout California, over 2 consecutive years beginning in April 2015, from both urban and agriculturally dominated watersheds. Water samples were analyzed by gas chromatography/mass spectrometry and liquid chromatrography/tandemAuthorsCorey J. Sanders, James L. Orlando, Michelle L. HladikPesticide inputs to the Sacramento–San Joaquin Delta, 2015–16: Results from the Delta Regional Monitoring Program
Emergent hypotheses about causes of the pelagic organism decline in the Sacramento–San Joaquin Delta (Delta) indicate that a more complete understanding of the quality of water entering the Delta is needed. Less than half of all pesticides used in the Delta watershed are measured in samples collected for routine monitoring, and with new pesticides continually being registered for use, the concentrAuthorsMatthew D. De Parsia, James L. Orlando, Megan M. McWayne, Michelle L. HladikEnvironmental risks and challenges associated with neonicotinoid insecticides
Neonicotinoid use has increased rapidly in recent years, with a global shift towards insecticide applications as seed coatings rather than aerial spraying. While the use of seed coatings can lessen the amount of overspray and drift, the near universal and prophylactic use of neonicotinoid seed coatings on major agricultural crops has led to widespread detections in the environment (pollen, soil, wAuthorsMichelle L. Hladik, Anson Main, Dave GoulsonYear-round presence of neonicotinoid insecticides in tributaries to the Great Lakes, USA
To better characterize the transport of neonicotinoid insecticides to the world's largest freshwater ecosystem, monthly samples (October 2015–September 2016) were collected from 10 major tributaries to the Great Lakes, USA. For the monthly tributary samples, neonicotinoids were detected in every month sampled and five of the six target neonicotinoids were detected. At least one neonicotinoid was dAuthorsMichelle L. Hladik, Steven R. Corsi, Dana W. Kolpin, Austin K. Baldwin, Brett R. Blackwell, Jenna E. CavallinLeaching and sorption of neonicotinoid insecticides and fungicides from seed coatings
Seed coatings are a treatment used on a variety of crops to improve production and offer protection against pests and fungal outbreaks. The leaching of the active ingredients associated with the seed coatings and the sorption to soil was evaluated under laboratory conditions using commercially available corn and soybean seeds to study the fate and transport of these pesticides under controlled conAuthorsKelly L. Smalling, Michelle L. Hladik, Corey Sanders, Kathryn KuivilaOccurrence of dichloroacetamide herbicide safeners and co-applied herbicides in midwestern U.S. streams
Dichloroacetamide safeners (e.g., AD-67, benoxacor, dichlormid, and furilazole) are co-applied with chloroacetanilide herbicides to protect crops from herbicide toxicity. While such safeners have been used since the early 1970s, there are minimal data about safener usage, occurrence in streams, or potential ecological effects. This study focused on one of these research gaps, occurrence in streamsAuthorsEmily Woodward, Michelle L. Hladik, Dana W. KolpinComplex mixtures of dissolved pesticides show potential aquatic toxicity in a synoptic study of Midwestern U.S. streams
Aquatic organisms in streams are exposed to pesticide mixtures that vary in composition over time in response to changes in flow conditions, pesticide inputs to the stream, and pesticide fate and degradation within the stream. To characterize mixtures of dissolved-phase pesticides and degradates in Midwestern streams, a synoptic study was conducted at 100 streams during May–August 2013. In weeklyAuthorsLisa H. Nowell, Patrick W. Moran, Travis S. Schmidt, Julia E. Norman, Naomi Nakagaki, Megan E. Shoda, Barbara Mahler, Peter C. Van Metre, Wesley W. Stone, Mark W. Sandstrom, Michelle L. HladikManagement of arthropod pathogen vectors in North America: Minimizing adverse effects on pollinators
Tick and mosquito management is important to public health protection. At the same time, growing concerns about declines of pollinator species raise the question of whether vector control practices might affect pollinator populations. We report the results of a task force of the North American Pollinator Protection Campaign (NAPPC) that examined potential effects of vector management practices onAuthorsHoward S. Ginsberg, Timothy A. Bargar, Michelle L. Hladik, Charles Lubelczyk - News
Below are news stories associated with this project.
- Partners
Below are partners associated with this project.