Milkweed plants bought at nurseries may expose monarch caterpillars to harmful pesticide residues
C. A. Halsch, S. M. Hoyle, A. Code, J. A. Fordyce, M. L. Forister
This study screens milkweed plants bought at US nurseries for pesticide residues, finding 61 pesticides in 235 samples, with 38% at harmful concentrations for monarch caterpillars.
bioRxiv · Mar 30, 2022Ecology