Abstract
Summary Crop variety effects on herbicide performance is not well characterised, particularly for sweet corn, a crop that varies greatly among hybrids in competitive ability with weeds. Field studies were used to determine the effects of crop competitive ability on season‐long herbicide performance in sweet corn. Two sethoxydim‐tolerant sweet corn hybrids were grown in the presence of Panicum miliaceum and plots were treated post‐emergence with a range of sethoxydim doses. Significant differences in height, leaf area index and intercepted light were observed between hybrids near anthesis. Across a range of sub‐lethal herbicide doses, the denser canopy hybrid Rocker suppressed P. miliaceum shoot biomass and fecundity to a greater extent than the hybrid Cahill. Yield of sweet corn improved to the level of the weed‐free control with increasing sethoxydim dose. The indirect effect of herbicide dose on crop yield, mediated through P. miliaceum biomass reduction, was significant for all of the Cahill’s yield traits but not Rocker. These results indicate that a less competitive hybrid requires relatively more weed suppression by the herbicide to not only reduce weed growth and seed production, but also to maintain yield. Sweet corn competitive ability consistently influences season‐long herbicide performance.
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Claims 7
Claim · model-written summary
Significant differences in height, leaf area index and intercepted light were observed between sweet corn hybrids near anthesis.
Verbatim
e0“particularly for sweet corn, a crop that varies greatly among hybrids in competitive ability with weeds”
e1“Two sethoxydim‐tolerant sweet corn hybrids were grown in the presence of Panicum miliaceum and plots were treated post‐emergence with a range of sethoxydim doses”
e2“Significant differences in height, leaf area index and intercepted light were observed between hybrids near anthesis”
Claim · model-written summary
The denser canopy hybrid Rocker suppressed P. miliaceum shoot biomass and fecundity to a greater extent than the hybrid Cahill across sub-lethal herbicide doses.
- Taxon
- sweet corne0
- Material
- Rockere3
- Treatment
- sub‐lethal herbicide dosese3
- Interactor
- P. miliaceum
Panicum miliaceume3weed - Outcome
- shoot biomass and fecunditye3
- Direction
- suppressede3
- Comparator
- Cahille3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“particularly for sweet corn, a crop that varies greatly among hybrids in competitive ability with weeds”
e3“Across a range of sub‐lethal herbicide doses, the denser canopy hybrid Rocker suppressed P. miliaceum shoot biomass and fecundity to a greater extent than the hybrid Cahill”
Claim · model-written summary
Yield of sweet corn improved to the level of the weed-free control with increasing sethoxydim dose.
Verbatim
e0“particularly for sweet corn, a crop that varies greatly among hybrids in competitive ability with weeds”
e4“Yield of sweet corn improved to the level of the weed‐free control with increasing sethoxydim dose”
Claim · model-written summary
For Cahill, the indirect effect of herbicide dose on crop yield, mediated through P. miliaceum biomass reduction, was significant for the yield traits.
- Taxon
- sweet corne0
- Material
- Cahille5
- Treatment
- herbicide dosee5
- Interactor
- P. miliaceumPanicum miliaceume5weed
- Outcome
- crop yielde5
- Qualifier
- mediated through P. miliaceum biomass reductione5
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“particularly for sweet corn, a crop that varies greatly among hybrids in competitive ability with weeds”
e5“The indirect effect of herbicide dose on crop yield, mediated through P. miliaceum biomass reduction, was significant for all of the Cahill’s yield traits but not Rocker”
Claim · model-written summary
For Rocker, the indirect effect of herbicide dose on crop yield, mediated through P. miliaceum biomass reduction, was not significant.
- Taxon
- sweet corne0
- Material
- Rockere5
- Treatment
- herbicide dosee5
- Interactor
- P. miliaceumPanicum miliaceume5weed
- Outcome
- crop yielde5
- Qualifier
- mediated through P. miliaceum biomass reductione5
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“particularly for sweet corn, a crop that varies greatly among hybrids in competitive ability with weeds”
e5“The indirect effect of herbicide dose on crop yield, mediated through P. miliaceum biomass reduction, was significant for all of the Cahill’s yield traits but not Rocker”
Claim · model-written summary
A less competitive hybrid requires relatively more weed suppression by the herbicide to reduce weed growth and seed production and to maintain yield.
Verbatim
e0“particularly for sweet corn, a crop that varies greatly among hybrids in competitive ability with weeds”
e6“These results indicate that a less competitive hybrid requires relatively more weed suppression by the herbicide to not only reduce weed growth and seed production, but also to maintain yield”
Claim · model-written summary
Sweet corn competitive ability consistently influences season-long herbicide performance.
Verbatim
e0“particularly for sweet corn, a crop that varies greatly among hybrids in competitive ability with weeds”
e7“Sweet corn competitive ability consistently influences season‐long herbicide performance”
The same questions in other papers
Sethoxydim · yield · Zea mays (maize)Positive and negative results
3 papers in the same direction as this paper · 7 in the opposite direction
- no effect
- no effect
- no effect
7 papers more in this group
See all 11 papers →herbicide · Panicum miliaceum · Zea mays (maize)Results agree
1 paper in the same direction as this paper
- 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.