Abstract
Abstract Achieving effective weed control is crucial for Wisconsin conventional corn growers farming in atrazine prohibition areas. Upon request from our extension clientele, a field study was conducted at Arlington and Brooklyn, WI, in 2021 and 2022 (four site‐years). The study aimed to evaluate the weed control efficacy of comprehensive two‐pass (PRE followed by POST) herbicide program treatments containing products with a wide range of active ingredients and sites of action from various manufacturers without atrazine and glyphosate, in conventional tillage non‐transgenic corn production. Nine and eight out of the 11 two‐pass herbicide programs investigated provided >90% giant foxtail ( Setaria faberi Herrm), common ragweed ( Ambrosia artemisiifolia L.), velvetleaf ( Abutilon theophrasti Medik) and waterhemp [ Amaranthus tuberculatus (Moq.) J.D. Sauer] control in 2021, respectively. However, only three treatments provided >90% waterhemp control and the greatest giant foxtail control in 2022 was 79%. Greater end‐of‐season broadleaf and grass weed control was observed in 2021 compared to 2022 due to lower weed pressure and timely early‐season rainfall in 2021. The two‐pass programs, acetochlor/mesotrione fb dicamba/tembotrione (94%–100%) and acetochlor/flumetsulan/clopyralid fb nicosulfuron + dicamba/diflufenzopyr (85%–100%), provided the most consistent broadleaf control across all site‐years. These results demonstrate that a well‐designed and timely deployed two‐pass herbicide program can provide effective control of common broadleaf and grass weeds in conventional corn production assuming moderate weed pressure and timely rainfall for soil residual herbicide activation, otherwise effective weed control, particularly of grass weeds, in the absence of atrazine and glyphosate can be challenging. These results are also translatable to support weed management decisions for glyphosate‐resistant corn hybrids in non‐atrazine prohibition areas.
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Claims 7
Claim · model-written summary
Nine programs in 2021 achieved greater than 90% control of the listed weeds.
- Taxon
- corn
Zea mays subsp. mayst0 - Treatment
- two‐pass herbicide programse0
- Interactor
- Setaria faberi
Setaria faberie0weed - Outcome
- giant foxtaile0
- Direction
- controle0
- Value
- >90%e0
- Qualifier
- Ninee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Nine and eight out of the 11 two‐pass herbicide programs investigated provided >90% giant foxtail ( Setaria faberi Herrm), common ragweed ( Ambrosia artemisiifolia L.), velvetleaf ( Abutilon theophrasti Medik) and waterhemp [ Amaranthus tuberculatus (Moq.) J.D. Sauer] control in 2021, respectively.”
t0“corn production”
Claim · model-written summary
Eight programs in 2021 achieved greater than 90% control of the listed weeds.
- Taxon
- cornZea mays subsp. mayst0
- Treatment
- two‐pass herbicide programse0
- Interactor
- Amaranthus tuberculatus
.jpeg?width=60)
Amaranthus tuberculatuse0weed - Outcome
- waterhempe0
- Direction
- controle0
- Value
- >90%e0
- Qualifier
- eighte0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
.jpeg?width=500)
Verbatim
e0“Nine and eight out of the 11 two‐pass herbicide programs investigated provided >90% giant foxtail ( Setaria faberi Herrm), common ragweed ( Ambrosia artemisiifolia L.), velvetleaf ( Abutilon theophrasti Medik) and waterhemp [ Amaranthus tuberculatus (Moq.) J.D. Sauer] control in 2021, respectively.”
t0“corn production”
Claim · model-written summary
Only three treatments exceeded 90% waterhemp control in 2022.
- Taxon
- cornZea mays subsp. mayst0
- Treatment
- treatmentse0
- Interactor
- waterhempe0weed
- Outcome
- waterhemp controle0
- Direction
- controle0
- Value
- >90%e0
- Qualifier
- threee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“only three treatments provided >90% waterhemp control”
t0“corn production”
Claim · model-written summary
Maximum giant foxtail control in 2022 was 79%.
- Taxon
- cornZea mays subsp. mayst0
- Interactor
- giant foxtaile0weed
- Outcome
- giant foxtail controle0
- Direction
- greateste0
- Value
- 79%e0
Not reportedTreatmentComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the greatest giant foxtail control in 2022 was 79%”
t0“corn production”
Claim · model-written summary
End-of-season broadleaf and grass weed control was greater in 2021 than 2022.
- Taxon
- cornZea mays subsp. mayst0
- Outcome
- end‐of‐season broadleaf and grass weed controle0
- Direction
- Greatere0
- Qualifier
- lower weed pressure and timely early‐season rainfall in 2021e0
- Comparator
- 2022e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Greater end‐of‐season broadleaf and grass weed control was observed in 2021 compared to 2022 due to lower weed pressure and timely early‐season rainfall in 2021.”
t0“corn production”
Claim · model-written summary
Acetochlor/mesotrione followed by dicamba/tembotrione consistently controlled broadleaf weeds across sites.
- Taxon
- cornZea mays subsp. mayst0
- Treatment
- acetochlor/mesotrione fb dicamba/tembotrionee0
- Outcome
- broadleaf controle1
- Direction
- most consistente1
- Value
- 94%–100%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“acetochlor/mesotrione fb dicamba/tembotrione (94%–100%)”
e1“provided the most consistent broadleaf control across all site‐years”
t0“corn production”
Claim · model-written summary
Acetochlor/flumetsulan/clopyralid followed by nicosulfuron plus dicamba/diflufenzopyr consistently controlled broadleaf weeds.
- Taxon
- cornZea mays subsp. mayst0
- Treatment
- acetochlor/flumetsulan/clopyralid fb nicosulfuron + dicamba/diflufenzopyre0
- Outcome
- broadleaf controle1
- Direction
- most consistente1
- Value
- 85%–100%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“acetochlor/flumetsulan/clopyralid fb nicosulfuron + dicamba/diflufenzopyr (85%–100%)”
e1“provided the most consistent broadleaf control across all site‐years”
t0“corn production”
The same questions in other papers
clopyralid · control · Zea mays (maize)Positive and negative results
2 papers in the same direction as this paper · 1 in the opposite direction
- negative
- positive
- positive
acetochlor · control · Zea mays (maize)Positive and negative results
12 papers in the same direction as this paper · 2 in the opposite direction · 1 reporting no difference from an alternative
- positive
- negative
- negative
12 papers more in this group
See all 16 papers →nicosulfuron · control · Zea mays (maize)Positive and negative results
25 papers in the same direction as this paper · 3 in the opposite direction · 1 reporting no difference from an alternative
- negative
- negative
- negative
26 papers more in this group
See all 30 papers →mesotrione · control · Zea mays (maize)Positive and negative results
29 papers in the same direction as this paper · 2 in the opposite direction
- positive
- positive
- positive
28 papers more in this group
See all 32 papers →dicamba · control · Zea mays (maize)Positive and negative results
30 papers in the same direction as this paper · 6 in the opposite direction
- negative
- negative
- no effect
33 papers more in this group
See all 37 papers →tembotrione · control · Zea mays (maize)Results agree
3 papers in the same direction as this paper
- positive
- positive
- positive
herbicide · Setaria faberi · Zea mays (maize)Results agree
1 paper in the same direction as this paper
- positive
herbicide · Amaranthus tuberculatus · Zea mays (maize)Results agree
2 papers in the same direction as this paper
- positive
- positive
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.