Monarch butterfly and milkweed declines substantially predate the use of genetically modified crops
Boyle JH, Dalgleish HJ, Puzey JR. Proceedings of the National Academy of Sciences of the United States of America, February 2019.
Go to the paper May need a subscription · doi:10.1073/pnas.1811437116
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Milkweeds in this paper
- Butterfly Weed Asclepias tuberosa
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Milkweed USA. (2026). Monarch butterfly and milkweed declines substantially predate the use of genetically modified crops (listing). Retrieved DATE, from https://milkweedusa.com/research/monarch-butterfly-and-milkweed-declines-substantially-predate-the-use-2019/
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"Monarch butterfly and milkweed declines substantially predate the use of genetically modified crops (listing)." Milkweed USA, 2026, https://milkweedusa.com/research/monarch-butterfly-and-milkweed-declines-substantially-predate-the-use-2019/. Accessed DATE.
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Milkweed USA. "Monarch butterfly and milkweed declines substantially predate the use of genetically modified crops (listing)." Last modified 2026-08-01. Accessed DATE. https://milkweedusa.com/research/monarch-butterfly-and-milkweed-declines-substantially-predate-the-use-2019/.
BibTeX
@misc{milkweedusa_researchmonarchbutterflyandm,
title = {Monarch butterfly and milkweed declines substantially predate the use of genetically modified crops (listing)},
author = {{Milkweed USA}},
year = {2026},
url = {https://milkweedusa.com/research/monarch-butterfly-and-milkweed-declines-substantially-predate-the-use-2019/},
note = {Accessed DATE}
}