glyphosate · Yield · Zea mays (maize)

Results differ77 papers: 42 positive, 35 negative or no effect · 47 pairs of papers confirmed to differ

120 claims from these papers; 41 citations between them.

Papers whose results differ, checked claim by claim 47

47 pairs of papers on this question report results that differ: an effect in one paper, the opposite effect or no effect in the other. Two model reviewers reading both claims accepted each pair.

Response of Corn to Simulated Glyphosate Drift Followed by In-Crop Herbicides (2009)
decreaseGlyphosate drift at 200 g/ha reduced yield by 49 to 56%.
Glyphosate Herbicide Use in Urochloa brizantha Management in Intercropping With Herbicide-Resistant Maize (2016)
no changeGlyphosate at 96 and 144 g ha-1 did not affect the maize grain yield.
What separates themDose: 0.2 kg/ha · 0.096–0.144 kg/haCompare the two papers →
Tolerance of Corn (Zea mays L.) to Early and Late Glyphosate Applications (2014)
no changeEarly treated corn had yields similar to untreated controls regardless of dose or timing.
Glyphosate Effect on Shikimate, Nitrate Reductase Activity, Yield, and Seed Composition in Corn (2010)
decreaseSimulated glyphosate drift reduced grain yield by 49-54% in non-GR corn.
The records name no dose, test system or situation that separates the two claims.Compare the two papers →
In-Crop and Autumn-Applied Glyphosate Reduced Purple Nutsedge (Cyperus rotundus) Density in No-Till Glyphosate-Resistant Corn and Soybean (2009)
no changeIn corn, in-crop or autumn-applied glyphosate did not affect yield.
Effect of glyphosate on weed management and grain yield in Kharif maize of transgenic stacked and conventional maize hybrids for higher productivity (2014)
increasePost-emergence glyphosate at 1800 g a.e ha-1 produced higher grain yield in maize hybrid 30V92 in both seasons.
The records name no dose, test system or situation that separates the two claims.Compare the two papers →
Roller Type and Operating Speed Effects on Rye Termination Rates, Soil Moisture, and Yield of Sweet Corn in a No-till System (2012)
no changeAdding glyphosate to rolling did not increase sweet corn yield in any of the three seasons.
Annual ryegrass control prior to seeding corn with glyphosate plus group 2 herbicides (2020)
increaseGlyphosate alone increased corn yield by 86% relative to control.
The records name no dose, test system or situation that separates the two claims.Compare the two papers →
Glyphosate as Harvest Aid for Corn (Zea mays) (1988)
no changeGlyphosate treatments did not reduce corn yield.
Biological response of maize hybrids to simulated glyphosate drift (2020)
decreaseGlyphosate at 160 g ha-1 at 6-7 maize leaves reduced maize yield by 81% on average relative to the control.
The records name no dose, test system or situation that separates the two claims.Compare the two papers →
Glyphosate use in transgenic maize: Effect on weeds and crop productivity in North-Western Indo-Gangetic Plains of Haryana (2020)
increaseGlyphosate improved maize grain yield relative to unweeded checks.
Effect of glyphosate application time on yield parameters of South African glyphosate-resistant maize cultivars (2021)
no changeGlyphosate application time did not significantly reduce yield compared with the untreated control in most cultivar x glyphosate product combinations.
The records name no dose, test system or situation that separates the two claims.Compare the two papers →

Show 41 more pairs

Response of Corn to Simulated Glyphosate Drift Followed by In-Crop Herbicides (2009)
decreaseGlyphosate drift at 200 g/ha reduced yield by 49 to 56%.
Glyphosate Resistance Technology Has Minimal or No Effect on Maize Mineral Content and Yield (2018)
no changeGlyphosate did not affect maize yield, aside from occasional inconsistent effects.
The records name no dose, test system or situation that separates the two claims.Compare the two papers →
Response of Corn to Simulated Glyphosate Drift Followed by In-Crop Herbicides (2009)
decreaseGlyphosate drift at 200 g/ha reduced yield by 49 to 56%.
Lack of Significant Effects of Glyphosate on Glyphosate-Resistant Maize in Different Field Locations (2023)
no changeGlyphosate had no significant effect on plant height, stem diameter, ear parameters, or yield.
The records name no dose, test system or situation that separates the two claims.Compare the two papers →
Glyphosate Herbicide Use in Urochloa brizantha Management in Intercropping With Herbicide-Resistant Maize (2016)
no changeGlyphosate at 96 and 144 g ha-1 did not affect the maize grain yield.
Biological response of maize hybrids to simulated glyphosate drift (2020)
decreaseGlyphosate at 160 g ha-1 at 6-7 maize leaves reduced maize yield by 81% on average relative to the control.
What separates themDose: 0.096–0.144 kg/ha · 0.16 kg/haCompare the two papers →
Response of Corn to Simulated Glyphosate Drift Followed by In-Crop Herbicides (2009)
decreaseGlyphosate drift at 200 g/ha reduced yield by 49 to 56%.
Tolerance of Corn (Zea mays L.) to Early and Late Glyphosate Applications (2014)
no changeEarly treated corn had yields similar to untreated controls regardless of dose or timing.
The records name no dose, test system or situation that separates the two claims.Compare the two papers →
Response of Corn to Simulated Glyphosate Drift Followed by In-Crop Herbicides (2009)
decreaseGlyphosate drift at 200 g/ha reduced yield by 49 to 56%.
In-Crop and Autumn-Applied Glyphosate Reduced Purple Nutsedge (Cyperus rotundus) Density in No-Till Glyphosate-Resistant Corn and Soybean (2009)
no changeIn corn, in-crop or autumn-applied glyphosate did not affect yield.
The records name no dose, test system or situation that separates the two claims.Compare the two papers →
Response of Corn to Simulated Glyphosate Drift Followed by In-Crop Herbicides (2009)
decreaseGlyphosate drift at 200 g/ha reduced yield by 49 to 56%.
Effect of glyphosate on weed management and grain yield in Kharif maize of transgenic stacked and conventional maize hybrids for higher productivity (2014)
increasePost-emergence glyphosate at 1800 g a.e ha-1 produced higher grain yield in maize hybrid 30V92 in both seasons.
The records name no dose, test system or situation that separates the two claims.Compare the two papers →
Response of Corn to Simulated Glyphosate Drift Followed by In-Crop Herbicides (2009)
decreaseGlyphosate drift at 200 g/ha reduced yield by 49 to 56%.
Glyphosate as Harvest Aid for Corn (Zea mays) (1988)
no changeGlyphosate treatments did not reduce corn yield.
The records name no dose, test system or situation that separates the two claims.Compare the two papers →
Response of Corn to Simulated Glyphosate Drift Followed by In-Crop Herbicides (2009)
decreaseGlyphosate drift at 200 g/ha reduced yield by 49 to 56%.
Annual ryegrass control prior to seeding corn with glyphosate plus group 2 herbicides (2020)
increaseGlyphosate alone increased corn yield by 86% relative to control.
The records name no dose, test system or situation that separates the two claims.Compare the two papers →
Response of Corn to Simulated Glyphosate Drift Followed by In-Crop Herbicides (2009)
decreaseGlyphosate drift at 200 g/ha reduced yield by 49 to 56%.
Glyphosate use in transgenic maize: Effect on weeds and crop productivity in North-Western Indo-Gangetic Plains of Haryana (2020)
increaseGlyphosate improved maize grain yield relative to unweeded checks.
The records name no dose, test system or situation that separates the two claims.Compare the two papers →
Response of Corn to Simulated Glyphosate Drift Followed by In-Crop Herbicides (2009)
decreaseGlyphosate drift at 200 g/ha reduced yield by 49 to 56%.
Effect of glyphosate application time on yield parameters of South African glyphosate-resistant maize cultivars (2021)
no changeGlyphosate application time did not significantly reduce yield compared with the untreated control in most cultivar x glyphosate product combinations.
The records name no dose, test system or situation that separates the two claims.Compare the two papers →
Tolerance of Corn (Zea mays L.) to Early and Late Glyphosate Applications (2014)
no changeEarly treated corn had yields similar to untreated controls regardless of dose or timing.
Annual ryegrass control prior to seeding corn with glyphosate plus group 2 herbicides (2020)
increaseGlyphosate alone increased corn yield by 86% relative to control.
The records name no dose, test system or situation that separates the two claims.Compare the two papers →
Tolerance of Corn (Zea mays L.) to Early and Late Glyphosate Applications (2014)
no changeEarly treated corn had yields similar to untreated controls regardless of dose or timing.
Biological response of maize hybrids to simulated glyphosate drift (2020)
decreaseGlyphosate at 160 g ha-1 at 6-7 maize leaves reduced maize yield by 81% on average relative to the control.
The records name no dose, test system or situation that separates the two claims.Compare the two papers →
Tolerance of Corn (Zea mays L.) to Early and Late Glyphosate Applications (2014)
no changeEarly treated corn had yields similar to untreated controls regardless of dose or timing.
Glyphosate use in transgenic maize: Effect on weeds and crop productivity in North-Western Indo-Gangetic Plains of Haryana (2020)
increaseGlyphosate improved maize grain yield relative to unweeded checks.
The records name no dose, test system or situation that separates the two claims.Compare the two papers →
Glyphosate Effect on Shikimate, Nitrate Reductase Activity, Yield, and Seed Composition in Corn (2010)
decreaseSimulated glyphosate drift reduced grain yield by 49-54% in non-GR corn.
In-Crop and Autumn-Applied Glyphosate Reduced Purple Nutsedge (Cyperus rotundus) Density in No-Till Glyphosate-Resistant Corn and Soybean (2009)
no changeIn corn, in-crop or autumn-applied glyphosate did not affect yield.
The records name no dose, test system or situation that separates the two claims.Compare the two papers →
Glyphosate Effect on Shikimate, Nitrate Reductase Activity, Yield, and Seed Composition in Corn (2010)
decreaseSimulated glyphosate drift reduced grain yield by 49-54% in non-GR corn.
Roller Type and Operating Speed Effects on Rye Termination Rates, Soil Moisture, and Yield of Sweet Corn in a No-till System (2012)
no changeAdding glyphosate to rolling did not increase sweet corn yield in any of the three seasons.
The records name no dose, test system or situation that separates the two claims.Compare the two papers →
Glyphosate Effect on Shikimate, Nitrate Reductase Activity, Yield, and Seed Composition in Corn (2010)
decreaseSimulated glyphosate drift reduced grain yield by 49-54% in non-GR corn.
Effect of glyphosate on weed management and grain yield in Kharif maize of transgenic stacked and conventional maize hybrids for higher productivity (2014)
increasePost-emergence glyphosate at 1800 g a.e ha-1 produced higher grain yield in maize hybrid 30V92 in both seasons.
The records name no dose, test system or situation that separates the two claims.Compare the two papers →
Glyphosate Effect on Shikimate, Nitrate Reductase Activity, Yield, and Seed Composition in Corn (2010)
decreaseSimulated glyphosate drift reduced grain yield by 49-54% in non-GR corn.
Glyphosate Herbicide Use in Urochloa brizantha Management in Intercropping With Herbicide-Resistant Maize (2016)
no changeGlyphosate at 96 and 144 g ha-1 did not affect the maize grain yield.
The records name no dose, test system or situation that separates the two claims.Compare the two papers →
Glyphosate Effect on Shikimate, Nitrate Reductase Activity, Yield, and Seed Composition in Corn (2010)
decreaseSimulated glyphosate drift reduced grain yield by 49-54% in non-GR corn.
Glyphosate as Harvest Aid for Corn (Zea mays) (1988)
no changeGlyphosate treatments did not reduce corn yield.
The records name no dose, test system or situation that separates the two claims.Compare the two papers →
Glyphosate Effect on Shikimate, Nitrate Reductase Activity, Yield, and Seed Composition in Corn (2010)
decreaseSimulated glyphosate drift reduced grain yield by 49-54% in non-GR corn.
Glyphosate Resistance Technology Has Minimal or No Effect on Maize Mineral Content and Yield (2018)
no changeGlyphosate did not affect maize yield, aside from occasional inconsistent effects.
The records name no dose, test system or situation that separates the two claims.Compare the two papers →
Glyphosate Effect on Shikimate, Nitrate Reductase Activity, Yield, and Seed Composition in Corn (2010)
decreaseSimulated glyphosate drift reduced grain yield by 49-54% in non-GR corn.
Annual ryegrass control prior to seeding corn with glyphosate plus group 2 herbicides (2020)
increaseGlyphosate alone increased corn yield by 86% relative to control.
The records name no dose, test system or situation that separates the two claims.Compare the two papers →
Glyphosate Effect on Shikimate, Nitrate Reductase Activity, Yield, and Seed Composition in Corn (2010)
decreaseSimulated glyphosate drift reduced grain yield by 49-54% in non-GR corn.
Glyphosate use in transgenic maize: Effect on weeds and crop productivity in North-Western Indo-Gangetic Plains of Haryana (2020)
increaseGlyphosate improved maize grain yield relative to unweeded checks.
The records name no dose, test system or situation that separates the two claims.Compare the two papers →
Glyphosate Effect on Shikimate, Nitrate Reductase Activity, Yield, and Seed Composition in Corn (2010)
decreaseSimulated glyphosate drift reduced grain yield by 49-54% in non-GR corn.
Effect of glyphosate application time on yield parameters of South African glyphosate-resistant maize cultivars (2021)
no changeGlyphosate application time did not significantly reduce yield compared with the untreated control in most cultivar x glyphosate product combinations.
The records name no dose, test system or situation that separates the two claims.Compare the two papers →
Glyphosate Effect on Shikimate, Nitrate Reductase Activity, Yield, and Seed Composition in Corn (2010)
decreaseSimulated glyphosate drift reduced grain yield by 49-54% in non-GR corn.
Lack of Significant Effects of Glyphosate on Glyphosate-Resistant Maize in Different Field Locations (2023)
no changeGlyphosate had no significant effect on plant height, stem diameter, ear parameters, or yield.
The records name no dose, test system or situation that separates the two claims.Compare the two papers →
In-Crop and Autumn-Applied Glyphosate Reduced Purple Nutsedge (Cyperus rotundus) Density in No-Till Glyphosate-Resistant Corn and Soybean (2009)
no changeIn corn, in-crop or autumn-applied glyphosate did not affect yield.
Annual ryegrass control prior to seeding corn with glyphosate plus group 2 herbicides (2020)
increaseGlyphosate alone increased corn yield by 86% relative to control.
The records name no dose, test system or situation that separates the two claims.Compare the two papers →
In-Crop and Autumn-Applied Glyphosate Reduced Purple Nutsedge (Cyperus rotundus) Density in No-Till Glyphosate-Resistant Corn and Soybean (2009)
no changeIn corn, in-crop or autumn-applied glyphosate did not affect yield.
Biological response of maize hybrids to simulated glyphosate drift (2020)
decreaseGlyphosate at 160 g ha-1 at 6-7 maize leaves reduced maize yield by 81% on average relative to the control.
The records name no dose, test system or situation that separates the two claims.Compare the two papers →
In-Crop and Autumn-Applied Glyphosate Reduced Purple Nutsedge (Cyperus rotundus) Density in No-Till Glyphosate-Resistant Corn and Soybean (2009)
no changeIn corn, in-crop or autumn-applied glyphosate did not affect yield.
Glyphosate use in transgenic maize: Effect on weeds and crop productivity in North-Western Indo-Gangetic Plains of Haryana (2020)
increaseGlyphosate improved maize grain yield relative to unweeded checks.
The records name no dose, test system or situation that separates the two claims.Compare the two papers →
Roller Type and Operating Speed Effects on Rye Termination Rates, Soil Moisture, and Yield of Sweet Corn in a No-till System (2012)
no changeAdding glyphosate to rolling did not increase sweet corn yield in any of the three seasons.
Biological response of maize hybrids to simulated glyphosate drift (2020)
decreaseGlyphosate at 160 g ha-1 at 6-7 maize leaves reduced maize yield by 81% on average relative to the control.
The records name no dose, test system or situation that separates the two claims.Compare the two papers →
Roller Type and Operating Speed Effects on Rye Termination Rates, Soil Moisture, and Yield of Sweet Corn in a No-till System (2012)
no changeAdding glyphosate to rolling did not increase sweet corn yield in any of the three seasons.
Glyphosate use in transgenic maize: Effect on weeds and crop productivity in North-Western Indo-Gangetic Plains of Haryana (2020)
increaseGlyphosate improved maize grain yield relative to unweeded checks.
The records name no dose, test system or situation that separates the two claims.Compare the two papers →
Glyphosate Herbicide Use in Urochloa brizantha Management in Intercropping With Herbicide-Resistant Maize (2016)
no changeGlyphosate at 96 and 144 g ha-1 did not affect the maize grain yield.
Annual ryegrass control prior to seeding corn with glyphosate plus group 2 herbicides (2020)
increaseGlyphosate alone increased corn yield by 86% relative to control.
The records name no dose, test system or situation that separates the two claims.Compare the two papers →
Glyphosate Herbicide Use in Urochloa brizantha Management in Intercropping With Herbicide-Resistant Maize (2016)
no changeGlyphosate at 96 and 144 g ha-1 did not affect the maize grain yield.
Glyphosate use in transgenic maize: Effect on weeds and crop productivity in North-Western Indo-Gangetic Plains of Haryana (2020)
increaseGlyphosate improved maize grain yield relative to unweeded checks.
The records name no dose, test system or situation that separates the two claims.Compare the two papers →
Glyphosate as Harvest Aid for Corn (Zea mays) (1988)
no changeGlyphosate treatments did not reduce corn yield.
Annual ryegrass control prior to seeding corn with glyphosate plus group 2 herbicides (2020)
increaseGlyphosate alone increased corn yield by 86% relative to control.
The records name no dose, test system or situation that separates the two claims.Compare the two papers →
Glyphosate as Harvest Aid for Corn (Zea mays) (1988)
no changeGlyphosate treatments did not reduce corn yield.
Glyphosate use in transgenic maize: Effect on weeds and crop productivity in North-Western Indo-Gangetic Plains of Haryana (2020)
increaseGlyphosate improved maize grain yield relative to unweeded checks.
The records name no dose, test system or situation that separates the two claims.Compare the two papers →
Glyphosate Resistance Technology Has Minimal or No Effect on Maize Mineral Content and Yield (2018)
no changeGlyphosate did not affect maize yield, aside from occasional inconsistent effects.
Annual ryegrass control prior to seeding corn with glyphosate plus group 2 herbicides (2020)
increaseGlyphosate alone increased corn yield by 86% relative to control.
The records name no dose, test system or situation that separates the two claims.Compare the two papers →
Glyphosate Resistance Technology Has Minimal or No Effect on Maize Mineral Content and Yield (2018)
no changeGlyphosate did not affect maize yield, aside from occasional inconsistent effects.
Biological response of maize hybrids to simulated glyphosate drift (2020)
decreaseGlyphosate at 160 g ha-1 at 6-7 maize leaves reduced maize yield by 81% on average relative to the control.
The records name no dose, test system or situation that separates the two claims.Compare the two papers →
Annual ryegrass control prior to seeding corn with glyphosate plus group 2 herbicides (2020)
increaseGlyphosate alone increased corn yield by 86% relative to control.
Biological response of maize hybrids to simulated glyphosate drift (2020)
decreaseGlyphosate at 160 g ha-1 at 6-7 maize leaves reduced maize yield by 81% on average relative to the control.
The records name no dose, test system or situation that separates the two claims.Compare the two papers →
Annual ryegrass control prior to seeding corn with glyphosate plus group 2 herbicides (2020)
increaseGlyphosate alone increased corn yield by 86% relative to control.
Effect of glyphosate application time on yield parameters of South African glyphosate-resistant maize cultivars (2021)
no changeGlyphosate application time did not significantly reduce yield compared with the untreated control in most cultivar x glyphosate product combinations.
The records name no dose, test system or situation that separates the two claims.Compare the two papers →
Annual ryegrass control prior to seeding corn with glyphosate plus group 2 herbicides (2020)
increaseGlyphosate alone increased corn yield by 86% relative to control.
Lack of Significant Effects of Glyphosate on Glyphosate-Resistant Maize in Different Field Locations (2023)
no changeGlyphosate had no significant effect on plant height, stem diameter, ear parameters, or yield.
The records name no dose, test system or situation that separates the two claims.Compare the two papers →
Biological response of maize hybrids to simulated glyphosate drift (2020)
decreaseGlyphosate at 160 g ha-1 at 6-7 maize leaves reduced maize yield by 81% on average relative to the control.
Glyphosate use in transgenic maize: Effect on weeds and crop productivity in North-Western Indo-Gangetic Plains of Haryana (2020)
increaseGlyphosate improved maize grain yield relative to unweeded checks.
The records name no dose, test system or situation that separates the two claims.Compare the two papers →
Biological response of maize hybrids to simulated glyphosate drift (2020)
decreaseGlyphosate at 160 g ha-1 at 6-7 maize leaves reduced maize yield by 81% on average relative to the control.
Effect of glyphosate application time on yield parameters of South African glyphosate-resistant maize cultivars (2021)
no changeGlyphosate application time did not significantly reduce yield compared with the untreated control in most cultivar x glyphosate product combinations.
The records name no dose, test system or situation that separates the two claims.Compare the two papers →
Biological response of maize hybrids to simulated glyphosate drift (2020)
decreaseGlyphosate at 160 g ha-1 at 6-7 maize leaves reduced maize yield by 81% on average relative to the control.
Lack of Significant Effects of Glyphosate on Glyphosate-Resistant Maize in Different Field Locations (2023)
no changeGlyphosate had no significant effect on plant height, stem diameter, ear parameters, or yield.
The records name no dose, test system or situation that separates the two claims.Compare the two papers →
Glyphosate use in transgenic maize: Effect on weeds and crop productivity in North-Western Indo-Gangetic Plains of Haryana (2020)
increaseGlyphosate improved maize grain yield relative to unweeded checks.
Lack of Significant Effects of Glyphosate on Glyphosate-Resistant Maize in Different Field Locations (2023)
no changeGlyphosate had no significant effect on plant height, stem diameter, ear parameters, or yield.
The records name no dose, test system or situation that separates the two claims.Compare the two papers →

How these papers cite each other

41 citations between these papers: 26 on the same side, 15 across the two sides.

Positive result
Negative result or no effect
Citation, pointing to the cited paper
Citation across the two sides
Larger circle: more citations overall

Years run left to right. Citations come from the papers’ OpenAlex reference lists. Hover a paper to bring forward its citations; click it to open the paper.

Papers reporting a positive result 42

Herbicide Applications on Wheat and Stubble for No‐Tillage Corn¹ · 1986
- positive
  Adding glyphosate to atrazine sometimes improved corn yields when applied after wheat harvest, compared with atrazine alone.
  compared with atrazine alone
Effects of Weed Management Systems on Weeds Under Varying Fertilizer Levels in Rainfed Maize1 · 1989
- positive
  Atrazine plus glyphosate increased grain yield 98% over the unweeded control.
  compared with unweeded control
Johnsongrass (Sorghum halepense) Control Systems for Field Corn (Zea mays) Utilizing Crop Rotation and Herbicides · 1998
- positive
  The highest returns in continuous corn came from nicosulfuron or from metolachlor and glyphosate.
cites 1 paper here
Bio-efficacy and economics of herbicide mixtures in zero-till maize (Zea mays) grown after rice (Oryza sativa) · 2001
- positive
  Atrazine + glyphosate tank mix increased grain yield by 70% over sole atrazine.
  compared with sole atrazine
- positive
  Atrazine + glyphosate tank mix increased grain yield by 170% over the weedy check.
  compared with weedy check
Yellow Nutsedge (Cyperus esculentus) and Annual Weed Control in Glyphosate-Resistant Field Corn (Zea mays)¹ · 2002
- positive
  Sequential glyphosate at at least 1.26 kg/ha increased corn yield relative to single applications.
  compared with single glyphosate applications
cited by 2 papers here
Effect of Postemergence Glyphosate Application Timing on Weed Control and Grain Yield in Glyphosate-Resistant Corn: Results of a 2-Yr Multistate Study¹ · 2003
- positive
  Two glyphosate applications gave higher corn grain yields than a single application when weeds were 5 cm tall or less.
  compared with a single application
- negative
  A single glyphosate application at the 5-cm timing gave corn grain yield at 93% of the weed-free control.
  compared with weed-free control
- negative
  A single glyphosate application at the 10-cm timing gave corn grain yield at 94% of the weed-free control.
  compared with weed-free control
- negative
  A single glyphosate application at the 15-cm timing gave corn grain yield at 93% of the weed-free control.
  compared with weed-free control
- negative
  A single glyphosate application at the 30-cm timing gave corn grain yield at 79% of the weed-free control.
  compared with weed-free control
- negative
  A single glyphosate application at the 23-cm timing gave corn grain yield at 91% of the weed-free control.
  compared with weed-free control
cites 1 paper herecited by 5 papers here
Weed Management in Glyphosate-Resistant Corn with Glyphosate and Halosulfuron · 2004
- positive
  Sequential glyphosate produced the highest net returns at all three locations.
  compared with glyphosate EPOST
- no effect
  Glyphosate EPOST and sequential glyphosate yielded similarly at all three locations.
  compared with Glyphosate EPOSTNo difference from an alternative treatment
- no effect
  Glyphosate EPOST and glyphosate plus halosulfuron EPOST gave similar net returns at two and one locations, respectively.
  compared with glyphosate EPOSTNo difference from an alternative treatment
cites 1 paper herecited by 2 papers here
Live and Killed Hairy Vetch Cover Crop Effects on Weeds and Yield in Glyphosate-Resistant Corn · 2004
- positive
  Glyphosate applied broadcast gave the highest corn yield (11,300 kg/ha) compared with a banded application (10,160 kg/ha).
  compared with a banded application
Effects of Glyphosate on Weed Management and Reproductive Biology of Glyphosate-Resistant Corn · 2004
- positive
  Glyphosate applied once or twice gave the highest corn yields.
- negative
  Glyphosate applied at V6 or later reduced corn pollen viability across hybrids.
- no effect
  Glyphosate did not influence corn pollination or seed set.
Alfalfa Management in No-tillage Corn · 2006
- positive
  At-planting glyphosate plus dicamba increased corn yield over other at-planting treatments.
  compared with other AP treatments
cites 1 paper here
Texas Panicum (Panicum texanum) Control in Irrigated Field Corn (Zea mays) with Foramsulfuron, Glyphosate, Nicosulfuron, and Pendimethalin · 2006
- positive
  Glyphosate applied POST and LPOST gave greater net returns than glyphosate POST, but only in 2004.
  compared with glyphosate POST
cites 1 paper here
Herbicide Programs for the Control of ALS-Resistant Shattercane (Sorghum bicolor) in Corn (Zea mays) · 2006
- positive
  Early glyphosate yielded as much corn as the weed-free control.
  compared with weed-free control (WFC)
- negative
  Late glyphosate yielded 91% of the weed-free control.
  compared with WFC
cites 1 paper herecited by 1 paper here
Control of Both Winter Annual and Summer Annual Weeds in No-till Corn with Between-row Mowing Systems · 2007
- positive
  Corn yields equaled the weed-free check for winter annual weed control with between-row mowing plus banded glyphosate at 1.1 kg ae/ha followed by summer annual weed control with banded atrazine plus S-metolachlor at 2.2 plus 1.8 kg ai/ha and between-row mowing.
  compared with weed-free check
Control of Acetolactate Synthase–Resistant Shattercane (Sorghum Bicolor) in Field Corn with Kih-485 · 2007
- positive
  Corn yields under POST KIH-485 plus glyphosate exceeded yields under any PRE treatment.
  compared with any PRE treatment
- positive
  Corn yields under POST KIH-485 plus glyphosate matched the weed-free control.
  compared with WFC
cites 2 papers here
Efficacy of Saflufenacil plus Dimethenamid-P for Weed Control in Corn · 2011
- positive
  A minimum dose of 184 g ha−1 of saflufenacil + dimethenamid-P followed by glyphosate was needed for corn yield to exceed that of glyphosate alone.
  compared with single treatment of glyphosate applied alone
Effect of Pre and Post Emergence Herbicides on Weed Control in Maize (Zea mays L.) · 2012
- positive
  Atrazine 50 WP (1.25 kg/ha) followed by glyphosate 41SL (3.0 kg/ha) gave higher net returns (Rs 60702 per ha) than the rest of the treatments.
  compared with rest of the treatments
- positive
  Atrazine 50 WP (1.25 kg/ha) followed by glyphosate 41SL (3.0 kg/ha) gave a higher benefit:cost ratio (3.76) than the rest of the treatments.
  compared with rest of the treatments
- positive
  Maize yield was higher (5305 kg/ha) with atrazine 50 WP 1.25 kg/ha followed by glyphosate 41SL 2.5 kg/ha.
Evaluation of Application Program and Timing in Herbicide-Resistant Corn · 2012
- positive
  In 2007 glyphosate gave higher grain yield than glufosinate.
  compared with glufosinate
cites 2 papers here
Influence of Post Emergence Application of Glyphosate on Weed Control Efficiency and Yield of Transgenic Maize · 2013
- positive
  Hybrid 900 M Gold had higher grain yield with glyphosate at 1800 g a.e/ha in kharif 2009.
Evaluation of Weed Control Options for Herbicide Resistant Transgenic Stacked (TC 1507 X NK603) and Conventional Maize Hybrids for Higher Productivity · 2013
- positive
  Glyphosate at 1800 g a.e ha-1 produced 11.23 t ha-1 grain yield in conventional maize hybrid 30V92.
Integrated Weed Management Studies on Weed Flora and Yield in Kharif Maize · 2013
- positive
  In maize, zero tillage with pre-plant glyphosate followed by post-emergence topramezone + atrazine (40 ml + 500 g a.i/ha) was equally effective with the other leading treatments in increasing most growth parameters, yield attributes, yield and economic advantage.
- positive
  In maize, zero tillage with pre-plant glyphosate followed by post-emergence atrazine + halosulfuran (1.0 kg + 90 g a.i./ha) was equally effective with the other leading treatments in increasing most growth parameters, yield attributes, yield and economic advantage.
cited by 1 paper here
Volunteer Glyphosate and Glufosinate Resistant Corn Competitiveness and Control in Glyphosate and Glufosinate Resistant Corn · 2014
- positive
  Glyphosate plus glufosinate applied POST reduced volunteer corn yield by 35% compared with the weedy control.
  compared with weedy control
- positive
  Glyphosate applied POST gave hybrid corn yield equivalent to the weed-free control.
  compared with weed free control
Comparative Efficiency of Tillage Practices in Maize · 2014
- positive
  DK 8031 under glyphosate had the highest grain yield among the tillage practices involved.
  compared with the tillage practices involved
Comparison of Glyphosate Formulations for Weed Control and Tolerance in Maize (Zea mays L.) and Soybean [Glycine max (L.) Merr.] · 2014
- positive
  Maize yield under WeatherMAX or Clearout was similar to the weed-free control.
  compared with weed-free control
cites 2 papers here
Effect of glyphosate on weed management and grain yield in Kharif maize of transgenic stacked and conventional maize hybrids for higher productivity · 2014
- positive
  Post-emergence glyphosate at 1800 g a.e ha-1 produced higher grain yield in maize hybrid 30V92 in both seasons.
cited by 2 papers here
Goss’s Wilt Incidence in Sweet Corn Is Independent of Transgenic Traits and Glyphosate · 2015
- positive
  Under weed-free conditions without glyphosate, several sweet corn yield traits were higher with GR+Bt.
cited by 3 papers here
Glyphosate Herbicide Use in Urochloa brizantha Management in Intercropping With Herbicide-Resistant Maize · 2016
- positive
  Glyphosate reduced the number of plants, tillers and dry matter of signalgrass compared with controls without herbicide.
  compared with controls without herbicide application
- positive
  Grain mass and productivity of maize grain increased with increasing glyphosate dose.
- no effect
  Glyphosate at 96 and 144 g ha-1 did not affect the maize grain yield.
- negative
  Maize yield was negatively influenced on the untreated control compared with glyphosate treatments.
  compared with untreated control
Biologically effective dose of glyphosate as influenced by weed size in corn · 2016
- positive
  Corn yield was greatest with glyphosate applied when weeds were at most 10 cm.
  compared with later glyphosate application timings
- negative
  Later glyphosate applications reduced corn yield.
  compared with up to 10 cm in height
cites 1 paper here
Assessment of nutrient removal by weeds and grain yield of transgenic maize and its counterpart hybrids under herbicidal weed control programmes · 2017
- positive
  Glyphosate at 1800 g a.e ha-1 in 900 M Gold gave higher grain yield in kharif.
- positive
  Glyphosate at 3600 g a.e ha-1 in Hishell gave higher grain yield in rabi.
Residual effect of pre-sowing weed management on the purple nutsedge (Cyperus rotundus) and succeeding maize germination and yield · 2019
- positive
  The sequential 50 g/ha treatment produced higher maize stover yield of 9, 500 kg/ha.
- positive
  The sequential 50 g/ha treatment produced higher maize grain yield of 9, 387 kg/ha.
Effect of tillage and weed management on yield and nutrient uptake by winter maize · 2019
- positive
  Glyphosate-treated zero tillage gave the highest grain yield of winter maize.
  compared with zero tillage
Control of annual ryegrass with spring-applied herbicides prior to seeding corn · 2020
- positive
  Glyphosate plus saflufenacil increased corn yield 69% through reduced ryegrass interference.
- positive
  Glyphosate plus Group 1 herbicides increased corn yield as much as 66%.
cited by 2 papers here
Annual ryegrass control prior to seeding corn with glyphosate plus group 2 herbicides · 2020
- positive
  Glyphosate alone increased corn yield by 86% relative to control.
  compared with control
cites 1 paper herecited by 1 paper here
Weed management in glyphosate-resistant maize · 2020
- positive
  Glyphosate combined with pre- or postemergence herbicides increased maize grain yield by approximately 14%.
Glyphosate use in transgenic maize: Effect on weeds and crop productivity in North-Western Indo-Gangetic Plains of Haryana · 2020
- positive
  Glyphosate improved maize grain yield relative to unweeded checks.
  compared with unweeded checks
Effect of weed control on weeds, grain yield and its components of maize (Zea mays L) · 2020
- positive
  The tank mix of atrazine and glyphosate with hand hoeing raised grain yield per unit area.
cites 2 papers here
Impact and Liberty Rates and Mixtures for Efficacy in Corn · 2021
- positive
  Status plus glyphosate gave decidedly greater corn yield.
Influence of soil cover and herbicide application on weed control and corn yield · 2022
- positive
  Amicarbazone and glyphosate, applied pre- and post-emergence, gave the best combination for corn yield.
Single and Split Herbicide Applications for Efficacy in Corn · 2022
- positive
  Corn yields were greatest with Lumax EZ preemergence followed by Acuron and glyphosate postemergence.
Effect of Integrated crop management and blackgram (Vigna mungo) intercropping in maize (Zea mays) · 2022
- positive
  Maize under ICM7 with blackgram had higher stover yield than conventional-till and organic modules (8.2 t/ha).
  compared with conventional-till and organic module
- positive
  Maize under ICM7 with blackgram had higher dry matter accumulation than conventional-till and organic modules (174.2 g/plant).
  compared with conventional-till and organic module
- positive
  Maize under ICM7 with blackgram had higher production than conventional-till and organic modules (60.2 kg/ha/day).
  compared with conventional-till and organic module
In maize, co-expression of GAT and GR79-EPSPS provides high glyphosate resistance, along with low glyphosate residues · 2023
- positive
  GG2 tolerated 9000 g acid equivalent glyphosate per hectare without a phenotype or yield effect.
Herbicide potassium glyphosate 660 g/L as weed control in hybrid corn (Zea mays L.) cultivation under no-tillage system · 2023
- positive
  The herbicide treatment increased corn growth and yield.
Saga of Soggy Sauerkraut · 2024
- positive
  Glyphosate degradation increased corn grain yield by 907.89 kg/ha on Shiocton silt loam soil.
- positive
  Glyphosate degradation increased corn silage yield by 6.62 t/ha on irrigated Kidder sandy loam soil.
- positive
  Glyphosate degradation increased corn grain yield by 726.31 kg/ha on irrigated Kidder sandy loam soil.

Papers reporting a negative result or no effect 35

The Effects of Fall Application of Glyphosate on Corn (Zea mays), Soybeans (Glycine max), and Johnsongrass (Sorghum halepense) · 1981
- negative
  Glyphosate applied to corn at the time of application sometimes reduced seed weight.
cited by 1 paper here
Glyphosate as Harvest Aid for Corn (Zea mays) · 1988
- no effect
  Glyphosate treatments did not reduce corn yield.
Effects of Shielded Spray of Paraquat and Glyphosate on the Growth and Yield of Corn (Zea mays L.) · 1992
- negative
  Glyphosate reduced corn yield by more than 60%.
Establishment of Corn in Rotation with Alfalfa and Rye: Influence of Grazing, Tillage, and Herbicides · 1998
- no effect
  Glyphosate applied before corn planting gave corn forage yield of 23 Mg per ha, similar to conventional no-till establishment (22 Mg per ha).
  compared with conventional no‐till establishmentNo difference from an alternative treatment
cited by 1 paper here
Influence of Herbicide Application Rate, Timing, and Interrow Cultivation on Weed Control and Corn (Zea mays) Yield in Glufosinate-Resistant and Glyphosate-Resistant Corn · 1999
- no effect
  Cultivation after glyphosate did not affect corn yield.
cited by 2 papers here
Delayed Burndown in No-Tillage Glyphosate-Resistant Corn (Zea mays) Planted into Soybean (Glycine max) Residue and a Wheat (Triticum aestivum) Cover Crop¹ · 2001
- no effect
  Corn yields after the glyphosate treatment at SPIKE or 3-LEAF timing were similar to the weed-free plots.
  compared with weed-free plotsNo difference from an alternative treatment
Rice (Oryza sativa) and Corn (Zea mays) Response to Simulated Drift of Glyphosate and Glufosinate¹ · 2003
- negative
  Late glyphosate at the highest rate reduced corn yield by 33%.
- negative
  Early glyphosate at the three highest rates reduced corn yield by 22 to 78% on average.
cited by 3 papers here
Response of Common Lambsquarters (Chenopodium album) to Glyphosate Application Timing and Rate in Glyphosate-Resistant Corn · 2004
- negative
  Corn yield declined only below 450 g/ha glyphosate.
cited by 1 paper here
Comparison of Glyphosate Products in Glyphosate-Resistant Cotton (Gossypium hirsutum) and Corn (Zea mays)¹ · 2005
- no effect
  Corn yield did not differ among glyphosate products or rates.
  compared with rates
cites 1 paper herecited by 3 papers here
Response of Barnyardgrass (Echinochloa crus-galli) to Glyphosate Application Timing and Rate in Glyphosate-Resistant Corn (Zea mays)¹ · 2005
- negative
  Corn yield declined only at glyphosate rates of 225 g/ha or less.
cites 1 paper here
Weed Control in Glyphosate-Resistant Corn as Affected by Preemergence Herbicide and Timing of Postemergence Herbicide Application · 2006
- no effect
  Corn grain yield was similar under glyphosate and nicosulfuron plus atrazine.
  compared with nicosulfuron plus atrazineNo difference from an alternative treatment
cites 3 papers here
Effect of Weed Removal Timing and Row Spacing on Soil Moisture in Corn (Zea mays) · 2006
- negative
  Weeds that emerged after the 5-cm glyphosate timing reduced soil moisture and grain yield at both locations.
- negative
  Delaying glyphosate applications until weeds reached 23 cm or more reduced corn yield at both locations.
cited by 1 paper here
Glyphosate Application Timings in Twin- and Single-row Corn and Soybean Spacings · 2007
- no effect
  Corn yield matched the weed-free control with glyphosate applied to weeds 10 to 15 cm tall in 2002.
  compared with weed-free controlNo difference from an alternative treatment
- no effect
  Corn yield matched the weed-free control with glyphosate applied to weeds 10 cm tall in 2003.
  compared with weed-free controlNo difference from an alternative treatment
cites 1 paper herecited by 1 paper here
Response of Corn to Simulated Glyphosate Drift Followed by In-Crop Herbicides · 2009
- negative
  Glyphosate drift at 200 g/ha reduced yield by 49 to 56%.
cites 1 paper herecited by 2 papers here
In-Crop and Autumn-Applied Glyphosate Reduced Purple Nutsedge (Cyperus rotundus) Density in No-Till Glyphosate-Resistant Corn and Soybean · 2009
- no effect
  In corn, in-crop or autumn-applied glyphosate did not affect yield.
cited by 1 paper here
Glyphosate Effect on Shikimate, Nitrate Reductase Activity, Yield, and Seed Composition in Corn · 2010
- no effect
  Glyphosate at label rates did not affect corn yield in GR and GR-stacked corn.
- negative
  Simulated glyphosate drift reduced grain yield by 49-54% in non-GR corn.
cites 3 papers here
Rotating a Field of Mature Miscanthus × giganteus to Glyphosate‐Resistant Crops · 2011
- negative
  Corn yield with one glyphosate application was generally reduced by 7.0%.
- no effect
  Corn yield with two glyphosate applications was not significantly reduced.
Roller Type and Operating Speed Effects on Rye Termination Rates, Soil Moisture, and Yield of Sweet Corn in a No-till System · 2012
- no effect
  Adding glyphosate to rolling did not increase sweet corn yield in any of the three seasons.
- negative
  In 2006, glyphosate plus rolling yielded less sweet corn than rolling alone.
  compared with roller alone treatments
Weed Control, Environmental Impact and Profitability of Two-Pass Weed Management Strategies in Glyphosate-Resistant Corn · 2013
- negative
  One LPOST glyphosate application reduced corn yield due to early weed interference.
- no effect
  Sequential EPOST fb LPOST glyphosate had no adverse effect on corn yield.
- no effect
  PRE residual herbicide followed by LPOST glyphosate gave corn yield equal to the weed-free control.
  compared with weed free controlNo difference from an alternative treatment
cites 1 paper here
Growth and yield of maize (Zea mays L.) in response to herbicide application in the coastal savannah ecozone of Ghana · 2013
- no effect
  Glyphosate, Paraquat and Atrazine gave maize dry matter accumulation similar to the hand-weeded control.
  compared with control
cited by 1 paper here
The effect of hard water, spray solution storage time, and ammonium sulfate on glyphosate efficacy and yield of glyphosate-resistant corn · 2014
- no effect
  Adding AMS to glyphosate did not affect corn yield.
cited by 1 paper here
Tolerance of Corn (Zea mays L.) to Early and Late Glyphosate Applications · 2014
- no effect
  Early treated corn had yields similar to untreated controls regardless of dose or timing.
  compared with untreated control
- no effect
  In another environment group, corn yields resembled untreated controls across dose and timing.
  compared with untreated control
cited by 1 paper here
Management of complex weed flora in maize with post-emergence herbicides · 2016
- no effect
  Paraquat and glyphosate treatments gave maize grain yield at par with atrazine.
  compared with atrazineNo difference from an alternative treatment
cites 1 paper here
Efficacy of potassium salt of glyphosate on weed control and yield in transgenic corn · 2016
- no effect
  Hishell gave equally good yield at all glyphosate rates.
cites 1 paper here
Tank mixture of glyphosate with 2,4-D accentuates 2,4-D injury in glyphosate-resistant corn · 2018
- negative
  Yield was reduced by 12% when 2,4-D at 1120 g a.i./ha was applied with glyphosate in the tank mixture.
Glyphosate Resistance Technology Has Minimal or No Effect on Maize Mineral Content and Yield · 2018
- no effect
  Glyphosate did not affect maize yield, aside from occasional inconsistent effects.
- no effect
  The GR transgene did not affect maize yield, aside from occasional inconsistent effects.
cites 1 paper herecited by 2 papers here
Selectivity of Saflufenacil Applied Alone or Mixed to Glyphosate in Maize · 2020
- negative
  Glyphosate plus saflufenacil increased yield losses.
- negative
  The tank mixture decreased corn yield by 40.81% compared with the mean of herbicides applied alone.
  compared with the averages of the applications of the herbicides alone
- negative
  The tank mixture decreased corn yield by 43.96% compared with the weeded control.
  compared with the weeded control
Proper Glyphosate Application at Post-anthesis Lowers Grain Moisture Content at Harvest and Reallocates Non-structural Carbohydrates in Maize · 2020
- negative
  Glyphosate significantly decreased PH6WC grain weight.
- negative
  GP250 reduced Z58 grain weight.
Biological response of maize hybrids to simulated glyphosate drift · 2020
- negative
  Glyphosate at 80 g ha-1 reduced maize yield by 30% relative to the control.
  compared with compared to the control
- no effect
  Glyphosate at 160 g ha-1 applied at 3-4 maize leaves caused only slight damage without affecting height and grain yield.
- negative
  Glyphosate at 160 g ha-1 at 6-7 maize leaves reduced maize yield by 81% on average relative to the control.
  compared with the control
cites 2 papers here
Early Postemergence Herbicide Tank-Mixtures for Control of Waterhemp Resistant to Four Herbicide Modes of Action in Corn · 2021
- no effect
  Corn grain yield was unaffected by the mixture that caused greater injury.
Effect of glyphosate application time on yield parameters of South African glyphosate-resistant maize cultivars · 2021
- no effect
  Glyphosate application time did not significantly reduce yield compared with the untreated control in most cultivar x glyphosate product combinations.
  compared with untreated control
- no effect
  No clear, consistent impacts on yield and yield parameters could be established from the application time of glyphosate across seasons.
cites 1 paper here
Annual Ryegrass Control in Corn With Glyphosate plus Residual Herbicides Applied Preplant in the Spring · 2022
- no effect
  Adding a residual herbicide to glyphosate did not improve corn seed yield.
  compared with glyphosateNo difference from an alternative treatment
cites 2 papers here
Lack of Significant Effects of Glyphosate on Glyphosate-Resistant Maize in Different Field Locations · 2023
- no effect
  Glyphosate had no significant effect on plant height, stem diameter, ear parameters, or yield.
cites 2 papers herecited by 1 paper here
Effect of Class Act NG Adjuvant on Glyphosate Efficacy in Corn · 2023
- no effect
  Adjuvant at 450, 900 and 1350 g ae ha-1 did not increase corn yield.
cites 1 paper here
Effects of glyphosate on glyphosate‐resistant maize growth and metabolic parameters in the greenhouse and field · 2024
- no effect
  Recommended glyphosate rates had no effect on GR maize growth parameters, including grain yield.
cites 3 papers here

A paper is on the positive side when any of its claims here is positive. Claims are grouped by organism, treatment and what was measured or targeted. Claims that compare genotypes are left out; a claim about lacking a nutrient counts the other way round in that nutrient’s question. “Results differ” marks a question where two model reviewers, reading both claims, accepted at least one pair of papers whose results differ.

glyphosate · Yield · Zea mays (maize)

Papers whose results differ, checked claim by claim 47

How these papers cite each other

Papers reporting a positive result 42

Papers reporting a negative result or no effect 35

glyphosate on Zea mays (maize) against other targets

glyphosate · yield on other organisms