Abstract
Field studies were conducted at three locations during both 2002 and 2003 to evaluate weed control and response of glyphosate-resistant (GR) corn to glyphosate or nicosulfuron plus atrazine applied POST at three application timings with and without alachlor plus atrazine applied PRE. The POST herbicides were applied timely (5- to 9-cm weeds) or applications were delayed 1 or 2 wk. All treatments, except the weedy check, were followed by glyphosate postemergence-directed (PDIR) 4 wk after the timely POST application. Common lambsquarters, common ragweed, Palmer amaranth, prickly sida, and smooth pigweed were controlled at least 94% regardless of PRE or POST treatments. Large crabgrass and fall panicum were controlled at least 96% by glyphosate regardless of PRE herbicide or POST application timing. In contrast, control by nicosulfuron plus atrazine POST in the absence of PRE herbicide decreased as application was delayed. Sicklepod was controlled at least 94% when POST herbicides were applied timely, but control by both POST herbicide treatments decreased with delayed application regardless of PRE herbicide. Tall morningglory was controlled 93% or greater by POST herbicides applied timely. Control by both POST herbicide treatments decreased as application was delayed, with glyphosate being affected more by timing than nicosulfuron plus atrazine. Corn grain yield was similar with glyphosate and nicosulfuron plus atrazine. Yield was unaffected by POST application timing when PRE herbicides were included. Without PRE herbicide, grain yield decreased as POST herbicide application was delayed.
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Claims 10
Claim · model-written summary
Five broadleaf weeds were controlled at least 94% across treatments.
- Taxon
- Corn
Zea mays subsp. mayst0 - Treatment
- PRE or POST treatmentse0
- Interactor
- Common lambsquarters
Chenopodium albume0weed - Outcome
- Common lambsquarters, common ragweed, Palmer amaranth, prickly sida, and smooth pigweed were controllede0
- Direction
- controllede0
- Value
- at least 94%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Common lambsquarters, common ragweed, Palmer amaranth, prickly sida, and smooth pigweed were controlled at least 94% regardless of PRE or POST treatments”
t0“Glyphosate-Resistant Corn”
Claim · model-written summary
Glyphosate controlled large crabgrass and fall panicum at least 96% irrespective of PRE herbicide or POST timing.
- Taxon
- CornZea mays subsp. mayst0
- Treatment
- glyphosatee0
- Interactor
- Large crabgrasse0weed
- Outcome
- Large crabgrass and fall panicum were controllede0
- Direction
- controllede0
- Value
- at least 96%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Large crabgrass and fall panicum were controlled at least 96% by glyphosate regardless of PRE herbicide or POST application timing”
t0“Glyphosate-Resistant Corn”
Claim · model-written summary
Without PRE herbicide, delayed nicosulfuron plus atrazine POST reduced weed control.
- Taxon
- CornZea mays subsp. mayst0
- Treatment
- nicosulfuron plus atrazine POSTe0
- Outcome
- controle0
- Direction
- decreasede0
- Comparator
- application was delayede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“control by nicosulfuron plus atrazine POST in the absence of PRE herbicide decreased as application was delayed”
t0“Glyphosate-Resistant Corn”
Claim · model-written summary
Timely POST herbicide application controlled sicklepod at least 94%.
- Taxon
- CornZea mays subsp. mayst0
- Treatment
- POST herbicidese0
- Interactor
- Sicklepode0weed
- Outcome
- Sicklepod was controllede0
- Direction
- controllede0
- Value
- at least 94%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Sicklepod was controlled at least 94% when POST herbicides were applied timely”
t0“Glyphosate-Resistant Corn”
Claim · model-written summary
Delayed application reduced sicklepod control by both POST herbicides regardless of PRE herbicide.
- Taxon
- CornZea mays subsp. mayst0
- Treatment
- delayed applicatione0
- Outcome
- controle0
- Direction
- decreasede0
- Qualifier
- regardless of PRE herbicidee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“control by both POST herbicide treatments decreased with delayed application regardless of PRE herbicide”
t0“Glyphosate-Resistant Corn”
Claim · model-written summary
Timely POST herbicides controlled tall morningglory at least 93%.
- Taxon
- CornZea mays subsp. mayst0
- Treatment
- POST herbicides applied timelye0
- Interactor
- Tall morningglorye0weed
- Outcome
- Tall morningglory was controllede0
- Direction
- controllede0
- Value
- 93% or greatere0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Tall morningglory was controlled 93% or greater by POST herbicides applied timely”
t0“Glyphosate-Resistant Corn”
Claim · model-written summary
Delayed POST application reduced tall morningglory control, more for glyphosate than nicosulfuron plus atrazine.
- Taxon
- CornZea mays subsp. mayst0
- Treatment
- application was delayede0
- Outcome
- Controle0
- Direction
- decreasede0
- Comparator
- nicosulfuron plus atrazinee0
Not reportedInteractor
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Control by both POST herbicide treatments decreased as application was delayed, with glyphosate being affected more by timing than nicosulfuron plus atrazine”
t0“Glyphosate-Resistant Corn”
Claim · model-written summary
Corn grain yield was similar under glyphosate and nicosulfuron plus atrazine.
- Taxon
- CornZea mays subsp. mayse0
- Treatment
- glyphosatee0
- Outcome
- grain yielde0
- Direction
- similare0
- Comparator
- nicosulfuron plus atrazinee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Corn grain yield was similar with glyphosate and nicosulfuron plus atrazine”
Claim · model-written summary
With PRE herbicide, POST application timing did not affect yield.
- Taxon
- CornZea mays subsp. mayst0
- Treatment
- POST application timinge0
- Outcome
- Yielde0
- Direction
- unaffectede0
- Qualifier
- when PRE herbicides were includede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Yield was unaffected by POST application timing when PRE herbicides were included”
t0“Glyphosate-Resistant Corn”
Claim · model-written summary
Without PRE herbicide, delayed POST application decreased grain yield.
- Taxon
- CornZea mays subsp. mayst0
- Treatment
- POST herbicide application was delayede0
- Outcome
- grain yielde0
- Direction
- decreasede0
- Qualifier
- Without PRE herbicidee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Without PRE herbicide, grain yield decreased as POST herbicide application was delayed”
t0“Glyphosate-Resistant Corn”
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