Abstract
Four field studies were conducted at the Peanut Belt Research Station near Lewiston Woodville, NC, in 2000, 2001, and 2002 to evaluate crop tolerance, weed control, grain yield, and net returns in glyphosate-resistant corn with various herbicide systems. Preemergence (PRE) treatment options included no herbicide, atrazine at 1.12 kg ai/ha, or atrazine plus metolachlor at 1.68 kg ai/ha. Postemergence (POST) treatment options included glyphosate at 1.12 kg ai/ha as either the isopropylamine salt or the diammonium salt, either alone or in mixtures with mesotrione at 105 g ai/ha plus crop oil concentrate at 1% (v/v) or halosulfuron at 53 g ai/ha plus 0.25% (v/v) nonionic surfactant. All response variables were independent of glyphosate formulation. Addition of metolachlor to atrazine PRE improved large crabgrass and goosegrass control but did not always improve Texas panicum control. POST control of these annual grasses was similar with glyphosate alone or in mixture with halosulfuron or mesotrione. Glyphosate POST controlled common lambsquarters and common ragweed 89 and 93%, respectively. Glyphosate plus halosulfuron POST provided more effective yellow nutsedge control than glyphosate POST. Atrazine PRE or atrazine plus metolachlor PRE followed by any glyphosate POST treatment controlled Ipomoea spp. at least 93%. Glyphosate plus mesotrione in total POST systems always provided greater control of Ipomoea spp. than glyphosate alone. The highest yielding treatments always included glyphosate POST, either with or without a PRE herbicide treatment. Similarly, systems that included any glyphosate POST treatment had the highest net returns.
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Claims 11
Claim · model-written summary
Response variables did not differ by glyphosate formulation.
Verbatim
e0“All response variables were independent of glyphosate formulation.”
t0“Glyphosate-Resistant Corn”
Claim · model-written summary
Adding metolachlor to atrazine improved large crabgrass and goosegrass control.
- Taxon
- corn
Zea mays subsp. mayse0t0 - Treatment
- metolachlor to atrazine PREe0
- Outcome
- large crabgrass and goosegrass controle0
- Direction
- improvede0
- Comparator
- atrazine PREe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Addition of metolachlor to atrazine PRE improved large crabgrass and goosegrass control”
t0“Glyphosate-Resistant Corn”
Claim · model-written summary
Adding metolachlor to atrazine did not consistently improve Texas panicum control.
- Taxon
- cornZea mays subsp. mayse0t0
- Treatment
- metolachlor to atrazine PREe0
- Outcome
- Texas panicum controle0
- Direction
- did not always improvee0
- Comparator
- atrazine PREe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Addition of metolachlor to atrazine PRE improved large crabgrass and goosegrass control but did not always improve Texas panicum control.”
t0“Glyphosate-Resistant Corn”
Claim · model-written summary
Annual grass control was similar with glyphosate alone and its mixtures with halosulfuron or mesotrione.
- Taxon
- cornZea mays subsp. mayse0t0
- Treatment
- glyphosate alone or in mixture with halosulfuron or mesotrionee0
- Outcome
- control of these annual grassese0
- Direction
- similare0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“POST control of these annual grasses was similar with glyphosate alone or in mixture with halosulfuron or mesotrione.”
t0“Glyphosate-Resistant Corn”
Claim · model-written summary
Glyphosate controlled common lambsquarters by 89%.
- Taxon
- cornZea mays subsp. mayse0t0
- Treatment
- Glyphosate POSTe0
- Interactor
- common lambsquarters
Chenopodium albume0t0weed - Outcome
- common lambsquarterse0
- Direction
- controllede0
- Value
- 89e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Glyphosate POST controlled common lambsquarters and common ragweed 89 and 93%, respectively.”
t0“Glyphosate-Resistant Corn”
Claim · model-written summary
Glyphosate controlled common ragweed by 93%.
- Taxon
- cornZea mays subsp. mayse0t0
- Treatment
- Glyphosate POSTe0
- Interactor
- common ragweed
Ambrosia artemisiifoliae0t0weed - Outcome
- common ragweede0
- Direction
- controllede0
- Value
- 93%e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Glyphosate POST controlled common lambsquarters and common ragweed 89 and 93%, respectively.”
t0“Glyphosate-Resistant Corn”
Claim · model-written summary
Glyphosate plus halosulfuron improved yellow nutsedge control over glyphosate alone.
- Taxon
- cornZea mays subsp. mayse0t0
- Treatment
- Glyphosate plus halosulfuron POSTe0
- Outcome
- yellow nutsedge controle0
- Direction
- more effectivee0
- Comparator
- glyphosate POSTe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Glyphosate plus halosulfuron POST provided more effective yellow nutsedge control than glyphosate POST.”
t0“Glyphosate-Resistant Corn”
Claim · model-written summary
Atrazine alone or with metolachlor followed by glyphosate controlled Ipomoea by at least 93%.
- Taxon
- cornZea mays subsp. mayse0t0
- Treatment
- Atrazine PRE or atrazine plus metolachlor PRE followed by any glyphosate POST treatmente0
- Outcome
- Ipomoea spp.e0
- Direction
- controllede0
- Value
- at least 93%e0
IpomoeaOrganisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Atrazine PRE or atrazine plus metolachlor PRE followed by any glyphosate POST treatment controlled Ipomoea spp. at least 93%.”
t0“Glyphosate-Resistant Corn”
Claim · model-written summary
Glyphosate plus mesotrione improved Ipomoea control over glyphosate alone.
- Taxon
- cornZea mays subsp. mayse0t0
- Treatment
- Glyphosate plus mesotrionee0
- Outcome
- control of Ipomoea spp.e0
- Direction
- greatere0
- Comparator
- glyphosate alonee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Glyphosate plus mesotrione in total POST systems always provided greater control of Ipomoea spp. than glyphosate alone.”
t0“Glyphosate-Resistant Corn”
Claim · model-written summary
The highest yielding treatments included postemergence glyphosate.
- Taxon
- cornZea mays subsp. mayse0t0
- Treatment
- glyphosate POSTe0
- Outcome
- highest yielding treatmentse0
- Direction
- higheste0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The highest yielding treatments always included glyphosate POST, either with or without a PRE herbicide treatment.”
t0“Glyphosate-Resistant Corn”
Claim · model-written summary
Systems including postemergence glyphosate had the highest net returns.
- Taxon
- cornZea mays subsp. mayse0t0
- Treatment
- glyphosate POST treatmente0
- Outcome
- net returnse0
- Direction
- higheste0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“systems that included any glyphosate POST treatment had the highest net returns.”
t0“Glyphosate-Resistant Corn”
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