Abstract
Field experiments were conducted at three locations in 2000 and 2001 to evaluate what effect soil characteristics have on sensitivity of two corn hybrids to soil-applied isoxaflutole plus flufenacet. Soil types were a Flanagan silt loam with 3.9% organic matter (OM), a Drummer silty clay loam with 5.0% OM, and a Cisne silt loam with 2.1% OM. Soil pH was adjusted to four target levels, < 6.0, 6.0 to 6.5, 6.6 to 7.0, and > 7.0, at each location. Isoxaflutole plus flufenacet treatments consisted of the recommended rate (1 ×) and two times (2 ×), and four times (4 ×) the recommended rates based on soil type. Additional treatments included 1 × and 2 × isoxaflutole plus flufenacet with 1.1 kg/ha atrazine and S-metolachor plus atrazine as a control treatment. Corn hybrid ‘Garst 8366’ (G8366) was more sensitive to soil-applied isoxaflutole plus flufenacet compared with ‘Garst 8600’ (G8600). Corn injury occurred only at two of three locations. Addition of atrazine to the 1 × and 2 × isoxaflutole plus flufenacet treatments showed a trend (P = 0.15) toward increased injury and reduced yield only for the G8366 on the Cisne soil. The 4 × rate of the premixture reduced yield 9 to 49% at two locations. Yields were reduced at the low-OM (2.1%) location, regardless of hybrid or application rate. At two locations, there was a negative linear relationship between soil pH and corn grain yield, particularly at the 4 × rate. Corn visual injury and yield reductions were greatest from herbicide applications to low-OM soils with high pH levels.Nomenclature: Atrazine; flufenacet; isoxaflutole; S-metolachor; corn, Zea mays L. ‘Garst 8600’ (G8600), ‘Garst 8366’ (G8366).Additional index words: Acetamide, crop safety, isoxazole, phytotoxicity, soil pH, soil OM.Abbreviations: CEC, cation exchange capacity; DAP, days after planting; OM, organic matter; UAN, urea–ammonium nitrate.
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Claims 9
Claim · model-written summary
Garst 8366 was more sensitive to isoxaflutole plus flufenacet than Garst 8600.
- Taxon
- Corn
Zea mays subsp. mayse0 - Material
- ‘Garst 8366’e0
- Treatment
- soil-applied isoxaflutole plus flufenacete0
- Outcome
- sensitivee0
- Direction
- more sensitivee0
- Comparator
- ‘Garst 8600’e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Corn hybrid ‘Garst 8366’ (G8366) was more sensitive to soil-applied isoxaflutole plus flufenacet compared with ‘Garst 8600’ (G8600)”
Claim · model-written summary
Corn injury occurred at two of three locations.
- Taxon
- CornZea mays subsp. mayse0
- Outcome
- Corn injurye0
- Value
- two of three locationse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Corn injury occurred only at two of three locations”
Claim · model-written summary
Adding atrazine tended to increase G8366 injury on Cisne soil.
- Taxon
- cornZea mays subsp. mayse1
- Material
- G8366e0
- Treatment
- Addition of atrazinee0
- Outcome
- injurye0
- Direction
- increasede0
- Qualifier
- trend (P = 0.15)e0
- Comparator
- 1 × and 2 × isoxaflutole plus flufenacet treatmentse0
- Setting
- Cisne soile0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Addition of atrazine to the 1 × and 2 × isoxaflutole plus flufenacet treatments showed a trend (P = 0.15) toward increased injury and reduced yield only for the G8366 on the Cisne soil”
e1“Corn hybrid ‘Garst 8366’ (G8366) was more sensitive to soil-applied isoxaflutole plus flufenacet compared with ‘Garst 8600’ (G8600)”
Claim · model-written summary
Adding atrazine tended to reduce G8366 yield on Cisne soil.
- Taxon
- cornZea mays subsp. mayse1
- Material
- G8366e0
- Treatment
- Addition of atrazinee0
- Outcome
- yielde0
- Direction
- reducede0
- Qualifier
- trend (P = 0.15)e0
- Comparator
- 1 × and 2 × isoxaflutole plus flufenacet treatmentse0
- Setting
- Cisne soile0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Addition of atrazine to the 1 × and 2 × isoxaflutole plus flufenacet treatments showed a trend (P = 0.15) toward increased injury and reduced yield only for the G8366 on the Cisne soil”
e1“Corn hybrid ‘Garst 8366’ (G8366) was more sensitive to soil-applied isoxaflutole plus flufenacet compared with ‘Garst 8600’ (G8600)”
Claim · model-written summary
Fourfold premixture rate reduced yield by 9 to 49%.
- Taxon
- cornZea mays subsp. mayse1
- Treatment
- 4 × rate of the premixturee0
- Outcome
- yielde0
- Direction
- reducede0
- Value
- 9 to 49%e0
- Setting
- two locationse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The 4 × rate of the premixture reduced yield 9 to 49% at two locations”
e1“Corn hybrid ‘Garst 8366’ (G8366) was more sensitive to soil-applied isoxaflutole plus flufenacet compared with ‘Garst 8600’ (G8600)”
Claim · model-written summary
Yield was reduced at the low organic matter location.
- Taxon
- cornZea mays subsp. mayse1
- Outcome
- Yieldse0
- Direction
- reducede0
- Qualifier
- regardless of hybrid or application ratee0
- Setting
- low-OM (2.1%) locatione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Yields were reduced at the low-OM (2.1%) location, regardless of hybrid or application rate”
e1“Corn hybrid ‘Garst 8366’ (G8366) was more sensitive to soil-applied isoxaflutole plus flufenacet compared with ‘Garst 8600’ (G8600)”
Claim · model-written summary
Soil pH was negatively related to corn grain yield at two locations.
- Taxon
- cornZea mays subsp. mayse0
- Outcome
- corn grain yielde0
- Direction
- negativee0
- Qualifier
- particularly at the 4 × ratee0
- Setting
- two locationse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“At two locations, there was a negative linear relationship between soil pH and corn grain yield, particularly at the 4 × rate”
Claim · model-written summary
Injury was greatest with herbicide on low organic matter, high pH soils.
- Taxon
- CornZea mays subsp. mayse0
- Treatment
- herbicide applicationse0
- Outcome
- visual injurye0
- Direction
- greateste0
- Setting
- low-OM soils with high pH levelse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Corn visual injury and yield reductions were greatest from herbicide applications to low-OM soils with high pH levels”
Claim · model-written summary
Yield reductions were greatest with herbicide on low organic matter, high pH soils.
- Taxon
- CornZea mays subsp. mayse0
- Treatment
- herbicide applicationse0
- Outcome
- yield reductionse0
- Direction
- greateste0
- Setting
- low-OM soils with high pH levelse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Corn visual injury and yield reductions were greatest from herbicide applications to low-OM soils with high pH levels”
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See all 23 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.