In the original publication of this article (Liu et al. 2020), several errors relating to the table footnotes were present due to a processing oversight by the publisher.
Note “b” for Table 1 was mistakenly omitted. The note should read:
bSurvival at recommended doses of Y and Z depended on genotypes, and therefore these values were not used in the model.
The positioning of several note callouts within Table 3 was incorrect, and the contents of notes “j” and “k” were swapped. The correct table, with notes, appears on the subsequent page.
The publisher apologizes for these errors, and no fault is attributed to the authors.
a Note that the calculations here are only presented as figurative examples and do not aim to promote any particular herbicide.
b Good yield without herbicide failure or bad yield (or bad year) due to resistance/weed control failure.
c Considering impacts of weed seed contamination and grain quality.
d Based on Enlist One® (Corteva Agriscience, Wilmington, DE), Enlist Duo® (Corteva Agriscience, Wilmington, DE), Liberty® 280 SL (BASF Corporation, Raleigh, NC), Prefix® (Syngenta Crop Protection, Inc., Greensboro, NC), and Roundup® PowerMax (Bayer Crop Science, St. Louis, MO).
e Based on N-Pak® AMS (Source AMS 34 2 × 2.5. Winfield® United, St. Paul, MN) and drift reduction agent Intact™ (2 × 2.5. Precision Labs Inc., Northbrook, IL).
f Based on Enlist™ soybeans (Corteva Agriscience, Wilmington, DE), Enlist E3™ soybeans (Corteva Agriscience, Wilmington, DE), and Roundup Ready® 2 soybeans (Bayer Crop Science, St. Louis, MO).
g Based on 2018 Iowa Farm Custom Rate Survey.
h 1 ha = 2.47 acre; 1 L = 0.028 U.S. bushel.
i Equals (6,095 L × US$0.23 L−1) − (US$30 × 2 herbicide cost) − (US$5 × 2 adjuvant cost) − US$100 seed cost − (US$20 × 2 labor and machine cost).
j Equals (2,612 L × US$0.17 L−1) − (US$30 × 2 herbicide cost) − (US$5 × 2 adjuvant cost) − US$100 seed cost − (US$20 × 2 labor and machine cost).
k Equals (5 good years × US$1,192) + (15 bad years × US$234).