Corey Sanders
Science and Products
Pesticide Fate Research Group (PFRG)
Pesticides are applied in agricultural and urban areas to control weeds, insects, fungus, and other pests. Applied pesticides and their degradates can be transported off-site through a variety of mechanisms; these pesticides can then be found in non-target areas. Pesticide transport can occur through the atmosphere, in the aqueous phase (surface and groundwater) and associated with soil/...
Pesticide concentrations associated with augmented flow pulses in the Yolo Bypass and Cache Slough Complex, California
Surface-water and suspended-sediment samples were collected and analyzed by the U.S. Geological Survey for multiple current-use pesticides and pesticide degradates approximately every 2 weeks at up to five sites in the Yolo Bypass and Cache Slough Complex before, during, and after augmented flow pulses in summer and fall 2016 and 2018 as well as...
Orlando, James L.; De Parsia, Matt; Sanders, Corey; Hladik, Michelle; Frantzich, Jared
Dissolved 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...
Stout, Sean M.; Orlando, James L.; McWayne-Holmes, Megan; Sanders, Corey; Hladik, Michelle L.
An initial comparison of pesticides and amphibian pathogens between natural and created wetlands in the New Jersey Pinelands, 2014–16
A study conducted by the U.S. Geological Survey, in cooperation with the New Jersey Pinelands Commission and Montclair State University, was designed to compare pesticide concentrations and the presence and prevalence of amphibian pathogens between natural ponds and two types of created wetlands, excavated ponds and stormwater basins, throughout...
Smalling, Kelly L.; Bunnell, John F.; Cohl, Jonathan; Romanok, Kristin M.; Hazard, Lisa; Monsen, Kirsten; Akob, Denise M.; Hansen, Angela M.; Hladik, Michelle L.; Abdallah, Nicole; Ahmed, Quratulain; Assan, Araba; De Parsia, Matthew; Griggs, Amaryl; McWayne-Holmes, Megan; Patel, Naisargi; Sanders, Corey; Shrestha, Yesha; Stout, Sean M.; Williams, Brianna
Detections 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/...
Sanders, Corey; Orlando, James L. ; Hladik, Michelle L.
Leaching 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...
Smalling, Kelly L.; Hladik, Michelle; Sanders, Corey; Kuivila, Kathryn
Dissolved pesticide concentrations entering the Sacramento-San Joaquin Delta from the Sacramento and San Joaquin Rivers, California, 2012-13
Surface-water samples were collected from the Sacramento and San Joaquin Rivers where they enter the Sacramento–San Joaquin Delta, and analyzed by the U.S. Geological Survey for a suite of 99 current-use pesticides and pesticide degradates. Samples were collected twice per month from May 2012 through July 2013 and from May 2012 through April 2013...
Orlando, James L.; McWayne, Megan; Sanders, Corey; Hladik, Michelle
Dissolved pesticide concentrations in the Sacramento-San Joaquin Delta and Grizzly Bay, California, 2011-12
Surface-water samples were collected from sites within the Sacramento-San Joaquin Delta and Grizzly Bay, California, during the spring in 2011 and 2012, and they were analyzed by the U.S. Geological Survey for a suite of 99 current-use pesticides and pesticide degradates. Samples were collected and analyzed as part of a collaborative project...
Orlando, James L.; McWayne, Megan; Sanders, Corey; Hladik, Michelle