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Pesticide residues in monarch butterflies collected from Pacific Grove, California, USA in January 2024

Dates

Publication Date
Start Date
2024-01-25
End Date
2024-01-29

Citation

Hladik, M.L., 2024, Pesticide residues in monarch butterflies collected from Pacific Grove, California, USA in January 2024: U.S. Geological Survey data release, https://doi.org/10.5066/P1UXFTJI.

Summary

In January 2024 adult monarch butterflies (Danaus plexippus (Linnaeus, 1758)) were found dead near their overwintering site in Pacific Grove, Monterey County, California, USA. Ten of the deceased monarchs (six females and four males) were collected from three sites by staff at the Pacific Grove Museum of Natural History and sent to the U.S. Geological Survey Organic Chemistry Research Laboratory for analysis. Each individual adult monarch was analyzed following methods in Black et al., 2023 and Gross et al., 2024a and 2024b for 181 pesticides and pesticide transformation products; 15 pesticides were detected and included 8 insecticides/insecticide transformation products, 2 fungicides, and 4 herbicides/herbicide transformation products. [...]

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Attached Files

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Pesticides Detected.txt
“Pesticide Detected”
1.74 KB text/plain
Compounds Analyzed.txt
“Compounds Analyzed”
9.79 KB text/plain
Adult monarch_USGS2024_CCO.jpg
“Adult monarch butterfly”
thumbnail 870.71 KB image/jpeg

Purpose

Quantify pesticide residues in adult monarchs collected during a die-off event in Pacific Grove, Monterey County California, in January 2024.
Adult monarch butterfly
Adult monarch butterfly

Map

Communities

  • USGS California Water Science Center
  • USGS Data Release Products

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DOI https://www.sciencebase.gov/vocab/category/item/identifier doi:10.5066/P1UXFTJI

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