Abstract
Manufacturers of several POST corn herbicides recommend tank-mixing their herbicides with atrazine to improve performance; however, future regulatory changes may place greater restrictions on atrazine use and limit its availability to growers. Our research objectives were to quantify the effects of tank-mixing atrazine with tembotrione compared to tembotrione alone on (1) weed control, (2) variability in weed control, and (3) sweet corn yield components and yield variability. Field studies were conducted for 2 yr each in Illinois, Oregon, Washington, and Ontario, Canada. Tembotrione at 31 g ha −1 was applied alone and with atrazine at 370 g ha −1 POST at the four- to five-collar stage of corn. The predominant weed species observed in the experiment were common to corn production, including large crabgrass, wild-proso millet, common lambsquarters, and velvetleaf. For nearly every weed species and species group, the addition of atrazine improved tembotrione performance by increasing mean levels of weed control 3 to 45% at 2 wk after treatment. Adding atrazine reduced variation (i.e., standard deviation) in control of the weed community by 45%. Sweet corn ear number and ear mass were 9 and 13% higher, respectively, and less variable when atrazine was applied with tembotrione, compared to tembotrione alone. Additional restrictions or the complete loss of atrazine for use in corn will necessitate major changes in sweet corn weed management systems.
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Claims 6
Claim · model-written summary
Adding atrazine improved mean weed control by 3 to 45% at two weeks.
- Taxon
- corn
Zea mays subsp. mayse1 - Treatment
- addition of atrazinee0
- Interactor
- weede0weed
- Outcome
- mean levels of weed controle0
- Direction
- increasinge0
- Value
- 3 to 45%e0
- Qualifier
- 2 wk after treatmente0
- Comparator
- Tembotrionet0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the addition of atrazine improved tembotrione performance by increasing mean levels of weed control 3 to 45% at 2 wk after treatment.”
t0“Tank-Mix Partner with Tembotrione”
e1“Sweet corn ear number and ear mass were 9 and 13% higher, respectively, and less variable when atrazine was applied with tembotrione, compared to tembotrione alone.”
Claim · model-written summary
Adding atrazine reduced variation in weed community control by 45%.
- Taxon
- cornZea mays subsp. mayse1
- Treatment
- Adding atrazinee0
- Interactor
- weed communitye0weed
- Outcome
- variation (i.e., standard deviation) in control of the weed communitye0
- Direction
- reducede0
- Value
- 45%e0
- Comparator
- Tembotrionet0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Adding atrazine reduced variation (i.e., standard deviation) in control of the weed community by 45%.”
t0“Tank-Mix Partner with Tembotrione”
e1“Sweet corn ear number and ear mass were 9 and 13% higher, respectively, and less variable when atrazine was applied with tembotrione, compared to tembotrione alone.”
Claim · model-written summary
Adding atrazine raised sweet corn ear number by 9% versus tembotrione alone.
Verbatim
e0“Sweet corn ear number and ear mass were 9 and 13% higher, respectively, and less variable when atrazine was applied with tembotrione, compared to tembotrione alone.”
Claim · model-written summary
Adding atrazine raised sweet corn ear mass by 13% versus tembotrione alone.
Verbatim
e0“Sweet corn ear number and ear mass were 9 and 13% higher, respectively, and less variable when atrazine was applied with tembotrione, compared to tembotrione alone.”
Claim · model-written summary
Sweet corn ear number and ear mass were less variable with atrazine and tembotrione.
Verbatim
e0“Sweet corn ear number and ear mass were 9 and 13% higher, respectively, and less variable when atrazine was applied with tembotrione, compared to tembotrione alone.”
Claim · model-written summary
The authors conclude atrazine restrictions will require major changes in sweet corn weed management.
Verbatim
e0“Additional restrictions or the complete loss of atrazine for use in corn will necessitate major changes in sweet corn weed management systems.”
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See all 73 papers →Claims are grouped by organism, treatment and what was measured or targeted. A paper counts as positive when any of its claims in the group is positive.