Title
Reduction in common milkweed (Asclepias syriaca) occurrence in Iowa cropland from 1999 to 2009
Document Type
Article
Publication Version
Submitted Manuscript
Publication Date
12-2010
Journal or Book Title
Crop Protection
Volume
29
Issue
12
First Page
1542
Last Page
1544
DOI
10.1016/j.cropro.2010.07.018
Abstract
The role of common milkweed in the lifecycle of the monarch butterfly has increased interest in the presence of this weed in the north central United States. An initial survey conducted in 1999 found that low densities of common milkweed occurred in approximately 50% of Iowa corn and soybean fields. In 2009, common milkweed was present in only 8% of surveyed fields, and the area within infested fields occupied by common milkweed was reduced by approximately 90% compared to 1999. The widespread adoption of glyphosate resistant corn and soybean cultivars and the reliance on post-emergence applications of glyphosate for weed control in crop fields likely has contributed to the decline in common milkweed in agricultural fields.
Copyright Owner
Elsevier
Copyright Date
2010
Language
en
File Format
application/pdf
Recommended Citation
Hartzler, Robert G., "Reduction in common milkweed (Asclepias syriaca) occurrence in Iowa cropland from 1999 to 2009" (2010). Agronomy Publications. 33.
https://lib.dr.iastate.edu/agron_pubs/33
Included in
Agricultural Science Commons, Agronomy and Crop Sciences Commons, Entomology Commons, Weed Science Commons
Comments
NOTICE: this is the author’s version of a work that was accepted for publication in Crop Protection. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Crop Protection, [29, 12, (2010)] doi:10.1016/ j.cropro.2010.07.018.