Abstract
Field studies were conducted in Oklahoma from 2010 to 2012 to develop protocols for fall sweet corn ( Zea mays ) production. Variables examined included a transgenic cultivar that expresses the CryIA(b) toxin from the bacterium Bacillus thuringiensis (Bt) and its nontransgenic near-isoline, seeding rates and planting dates, and various insecticide regimens. We found that, in eastern Oklahoma, a suitable planting window would correspond roughly to the last 2 weeks in July. Within this favorable period and given timely irrigation, it was possible to sow corn to an acceptable stand. A seeding rate ≈1½ times the desired final stand of one plant/ft appeared to be satisfactory. Use of a cultivar (GSS-0966) with genetic resistance to lepidopteran pests was a critical factor for successful production of fall sweet corn. Efforts to produce a crop with a nontransgenic cultivar using insecticides with relatively low mammalian toxicity were unsuccessful. Our experiments support previous recommendations for applying supplemental insecticides to transgenic Bt sweet corn to potentially increase production of “premium” ears by reducing the percentage of ears with severe insect damage (damage >1½ inches from the cob tip). We demonstrated that a spray schedule that rotated two insecticides with intermediate mammalian toxicity (carbaryl and permethrin) was as effective in reducing severe insect damage to ears of ‘GSS-0966’ as a similar schedule that rotated two highly toxic insecticides (esfenvalerate and methomyl).
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Claims 7
Claim · model-written summary
A planting window in eastern Oklahoma corresponded roughly to the last two weeks of July.
- Taxon
- corn
Zea mays subsp. mayse1 - Outcome
- suitable planting windowe0
- Value
- last 2 weeks in Julye0
- Setting
- eastern Oklahomae0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“in eastern Oklahoma, a suitable planting window would correspond roughly to the last 2 weeks in July.”
e1“Within this favorable period and given timely irrigation, it was possible to sow corn to an acceptable stand.”
Claim · model-written summary
Timely irrigation within the favorable period allowed an acceptable stand.
- Taxon
- cornZea mays subsp. mayse0
- Treatment
- timely irrigatione0
- Outcome
- acceptable stande0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Within this favorable period and given timely irrigation, it was possible to sow corn to an acceptable stand.”
Claim · model-written summary
A seeding rate roughly one and a half times the target stand appeared satisfactory.
- Taxon
- CornZea mays subsp. mayst0
- Outcome
- seeding rate ≈1½ times the desired final stand of one plant/fte0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“A seeding rate ≈1½ times the desired final stand of one plant/ft appeared to be satisfactory.”
t0“Sweet Corn”
Claim · model-written summary
Genetically resistant GSS-0966 was critical for successful fall production.
Verbatim
e0“Use of a cultivar (GSS-0966) with genetic resistance to lepidopteran pests was a critical factor for successful production of fall sweet corn.”
Claim · model-written summary
A nontransgenic cultivar with low mammalian toxicity insecticides failed to produce a crop.
- Taxon
- CornZea mays subsp. mayst0
- Material
- nontransgenic cultivare0
- Treatment
- insecticides with relatively low mammalian toxicitye0
- Outcome
- produce a crope0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Efforts to produce a crop with a nontransgenic cultivar using insecticides with relatively low mammalian toxicity were unsuccessful.”
t0“Sweet Corn”
Claim · model-written summary
Supplemental insecticides may increase premium ears by reducing severe insect damage.
Verbatim
e0“applying supplemental insecticides to transgenic Bt sweet corn to potentially increase production of “premium” ears by reducing the percentage of ears with severe insect damage”
Claim · model-written summary
Carbaryl and permethrin rotation reduced severe ear damage as effectively as esfenvalerate and methomyl rotation.
- Taxon
- CornZea mays subsp. mayst0
- Material
- GSS-0966e0
- Treatment
- carbaryl and permethrine0
- Interactor
- insecte0pest
- Outcome
- severe insect damage to earse0
- Direction
- as effective in reducinge0
- Comparator
- esfenvalerate and methomyle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“a spray schedule that rotated two insecticides with intermediate mammalian toxicity (carbaryl and permethrin) was as effective in reducing severe insect damage to ears of ‘GSS-0966’ as a similar schedule that rotated two highly toxic insecticides (esfenvalerate and methomyl).”
t0“Sweet Corn”
The same questions in other papers
permethrin · pest · Zea mays (maize)Positive and negative results
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- negative
- negative
- positive
1 paper more in this group
See all 5 papers →carbaryl · pest · Zea mays (maize)Results agree
6 papers in the same direction as this paper
- positive
- positive
- positive
3 papers more in this group
See all 7 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.