Abstract
Sensitivity to certain P450‐metabolized herbicides in corn ( Zea mays L.) is largely conditioned by a single cytochrome P450 (CYP) gene. Little to no research has been done to evaluate the effect of CYP genotype on sweet corn yield. Yield of 23 sweet corn hybrids of known CYP genotype was evaluated in 2007, 2008, and 2009 following postemergence applications of mesotrione, an hydroxyphenylpyruvate dioxygenase (HPPD) inhibitor, or nicosulfuron, an acetolactate synthase (ALS) inhibitor, at two growth stages. Mesotrione and nicosulfuron were evaluated in separate experiments. Treatments included herbicide application during the V3 to V5 or V5 to V7 growth stages and a nontreated control. Crop injury, measured 7 d after treatment (DAT), ranged from 0 to 87% for mesotrione and 0 to 54% for nicosulfuron among CYP genotypes. Injury from both mesotrione and nicosulfuron was most severe following application during V3 to V5 growth stages on hybrids with mutant (i.e., nonfunctional) cyp alleles. Only hybrids homozygous for mutant cyp alleles (i.e., cypcyp ) suffered yield losses from mesotrione, ranging from 9 to 40%. These hybrids were not evaluated for nicosulfuron because applications of ALS‐inhibiting herbicides kill cypcyp hybrids. Nicosulfuron reduced the yield of CYPcyp hybrids only; whereas mesotrione did not. Yield losses from nicosulfuron ranged from 9 to 35% among CYPcyp hybrids and were associated with moderate to severe loss of kernel rows (i.e., ear pinching). Yield of CYPCYP hybrids was not affected by mesotrione or nicosulfuron.
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Claims 10
Claim · model-written summary
Mesotrione injury ranged from 0 to 87% across CYP genotypes.
Verbatim
e0“Crop injury, measured 7 d after treatment (DAT), ranged from 0 to 87% for mesotrione and 0 to 54% for nicosulfuron among CYP genotypes.”
t0“Sweet Corn Yield”
Claim · model-written summary
Nicosulfuron injury ranged from 0 to 54% across CYP genotypes.
Verbatim
e0“Crop injury, measured 7 d after treatment (DAT), ranged from 0 to 87% for mesotrione and 0 to 54% for nicosulfuron among CYP genotypes.”
t0“Sweet Corn Yield”
Claim · model-written summary
Both herbicides caused the most severe injury when applied at V3 to V5 to hybrids with mutant cyp alleles.
Verbatim
e0“Injury from both mesotrione and nicosulfuron was most severe following application during V3 to V5 growth stages on hybrids with mutant (i.e., nonfunctional) cyp alleles.”
t0“Sweet Corn Yield”
Claim · model-written summary
Mesotrione caused 9 to 40% yield losses only in homozygous cypcyp hybrids.
- Taxon
- sweet cornt0
- Material
- cypcype0
- Treatment
- mesotrionee0
- Outcome
- yielde0
- Direction
- lossese0
- Value
- 9 to 40%e0
Not reportedComparator
Verbatim
e0“Only hybrids homozygous for mutant cyp alleles (i.e., cypcyp ) suffered yield losses from mesotrione, ranging from 9 to 40%.”
t0“Sweet Corn Yield”
Claim · model-written summary
Nicosulfuron reduced yield only in CYPcyp hybrids.
Not reportedComparator
Verbatim
e0“Nicosulfuron reduced the yield of CYPcyp hybrids only; whereas mesotrione did not.”
t0“Sweet Corn Yield”
Claim · model-written summary
Mesotrione did not reduce yield in CYPcyp hybrids.
- Taxon
- sweet cornt0
- Material
- CYPcyp hybridse0
- Treatment
- mesotrionee0
- Outcome
- yielde0
- Direction
- no_changeinferrede0
Not reportedComparator
Verbatim
e0“Nicosulfuron reduced the yield of CYPcyp hybrids only; whereas mesotrione did not.”
t0“Sweet Corn Yield”
Claim · model-written summary
Nicosulfuron caused 9 to 35% yield loss in CYPcyp hybrids.
- Taxon
- sweet cornt0
- Material
- CYPcyp hybridse0
- Treatment
- nicosulfurone0
- Outcome
- Yielde0
- Direction
- lossese0
- Value
- 9 to 35%e0
Not reportedComparator
Verbatim
e0“Yield losses from nicosulfuron ranged from 9 to 35% among CYPcyp hybrids and were associated with moderate to severe loss of kernel rows (i.e., ear pinching).”
t0“Sweet Corn Yield”
Claim · model-written summary
Nicosulfuron yield losses in CYPcyp hybrids were associated with loss of kernel rows.
Verbatim
e0“Yield losses from nicosulfuron ranged from 9 to 35% among CYPcyp hybrids and were associated with moderate to severe loss of kernel rows (i.e., ear pinching).”
t0“Sweet Corn Yield”
Claim · model-written summary
Neither mesotrione nor nicosulfuron affected yield of CYPCYP hybrids.
- Taxon
- sweet cornt0
- Material
- CYPCYP hybridse0
- Treatment
- mesotrionee0
- Outcome
- Yielde0
- Direction
- no_changeinferrede0
Not reportedComparator
Verbatim
e0“Yield of CYPCYP hybrids was not affected by mesotrione or nicosulfuron.”
t0“Sweet Corn Yield”
Claim · model-written summary
Nicosulfuron did not affect yield of CYPCYP hybrids.
- Taxon
- sweet cornt0
- Material
- CYPCYP hybridse0
- Treatment
- nicosulfurone0
- Outcome
- Yielde0
- Direction
- no_changeinferrede0
Not reportedComparator
Verbatim
e0“Yield of CYPCYP hybrids was not affected by mesotrione or nicosulfuron.”
t0“Sweet Corn Yield”
The same questions in other papers
mesotrione · yield · Zea mays (maize)Results differ
7 papers in the same direction as this paper · 21 in the opposite direction
- positive
- no effect
- positive
25 papers more in this group
See all 29 papers →nicosulfuron · yield · Zea mays (maize)Results differ
18 papers in the same direction as this paper · 40 in the opposite direction
- positive
- negative
- no effect
55 papers more in this group
See all 59 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.