Abstract
Triazine-resistant (TR) common waterhemp was reported and confirmed in Fillmore County, NE in 1990. A survey of 81 fields was conducted to characterize the occurrence of common waterhemp and grower practices. Sampled fields fell into three categories: suspected by growers to contain resistant plants (26 fields), randomly selected (28 fields), and adjacent to fields containing TR common waterhemp (27 fields). Resistant plants were found in 64% of all fields. Resistance was confirmed in 92% of the fields suspected by growers to contain resistant plants. Adjacent fields were no more likely to contain resistant plants than randomly chosen fields. Crop rotation did not significantly affect occurrence of resistance. Resistance was associated with the grower, indicating movement of resistant seed between fields via equipment. Atrazine, bromoxynil plus atrazine, and bentazon plus atrazine provided less than 75% postemergence control of TR common waterhemp, while primisulfuron, dicamba plus atrazine, primisulfuron plus dicamba, dicamba, 2,4-D ester, and metribuzin plus bentazon gave over 85% control.
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Claims 7
Claim · model-written summary
Resistant waterhemp occurred in 64% of surveyed fields.
- Interactor
- Common Waterhemp (Amaranthus rudis)
.jpeg?width=60)
Amaranthus tuberculatust0weed - Outcome
- Resistant plantse0
- Value
- 64%e0
Zea maysOrganisms pictured · Representative pictures of the matched species, not figures from the paper.
.jpeg?width=500)
Verbatim
e0“Resistant plants were found in 64% of all fields.”
t0“Common Waterhemp (Amaranthus rudis) in Field Corn (Zea mays)”
Claim · model-written summary
Resistance was confirmed in 92% of grower-suspected fields.
- Interactor
- Common Waterhemp (Amaranthus rudis)Amaranthus tuberculatust0weed
- Outcome
- Resistancee0
- Value
- 92%e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Resistance was confirmed in 92% of the fields suspected by growers to contain resistant plants.”
t0“Common Waterhemp (Amaranthus rudis) in Field Corn (Zea mays)”
Claim · model-written summary
Adjacent fields were no more likely to contain resistant plants than random fields.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Adjacent fields were no more likely to contain resistant plants than randomly chosen fields.”
t0“Common Waterhemp (Amaranthus rudis) in Field Corn (Zea mays)”
Claim · model-written summary
Crop rotation did not significantly affect resistance occurrence.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Crop rotation did not significantly affect occurrence of resistance.”
t0“Field Corn (Zea mays)”
Claim · model-written summary
Resistance was associated with the grower.
- Outcome
- Resistancee0
- Qualifier
- movement of resistant seed between fields via equipmente0
- Setting
- fieldse0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Resistance was associated with the grower, indicating movement of resistant seed between fields via equipment.”
t0“Field Corn (Zea mays)”
Claim · model-written summary
Atrazine, bromoxynil plus atrazine, and bentazon plus atrazine each controlled less than 75% of resistant waterhemp.
- Treatment
- Atrazine, bromoxynil plus atrazine, and bentazon plus atrazinee0
- Interactor
- TR common waterhempe0weed
- Outcome
- postemergence control of TR common waterhempe0
- Direction
- less thane0
- Value
- 75%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Atrazine, bromoxynil plus atrazine, and bentazon plus atrazine provided less than 75% postemergence control of TR common waterhemp”
t0“Field Corn (Zea mays)”
Claim · model-written summary
The listed alternative herbicides each controlled over 85% of resistant waterhemp.
- Treatment
- primisulfuron, dicamba plus atrazine, primisulfuron plus dicamba, dicamba, 2,4-D ester, and metribuzin plus bentazone0
- Interactor
- Common Waterhemp (Amaranthus rudis)Amaranthus tuberculatust0weed
- Outcome
- controle0
- Direction
- overe0
- Value
- 85%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“primisulfuron, dicamba plus atrazine, primisulfuron plus dicamba, dicamba, 2,4-D ester, and metribuzin plus bentazon gave over 85% control.”
t0“Common Waterhemp (Amaranthus rudis) in Field Corn (Zea mays)”
The same questions in other papers
bentazone · physiology: gas exchange · Zea mays (maize)Positive and negative results
1 in the opposite direction
- positive
3,5-dibromo-4-hydroxybenzonitrile · physiology: gas exchange · Zea mays (maize)Positive and negative results
1 in the opposite direction
- positive
atrazine · physiology: gas exchange · Zea mays (maize)Positive and negative results
1 paper in the same direction as this paper · 2 in the opposite direction
- positive
- positive
- no effect
metribuzin · Amaranthus tuberculatus · Zea mays (maize)Results agree
1 paper in the same direction as this paper
- positive
bentazone · Amaranthus tuberculatus · Zea mays (maize)Results agree
1 paper in the same direction as this paper
- positive
atrazine · 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.