Intervention effectmodel-written summary

Corn yield declined only at glyphosate rates of 225 g/ha or less.

A claim from Response of Barnyardgrass (Echinochloa crus-galli) to Glyphosate Application Timing and Rate in Glyphosate-Resistant Corn (Zea mays)1 · 2005

Intervention effectobservedoriginal resultnegativemeasured

Claim · model-written summary

Corn yield declined only at glyphosate rates of 225 g/ha or less.

Treatment
glyphosate rate of 225 g/ha and belowe0
Outcome
Corn yielde0
Direction
declinede0

Not reportedMaterialGeneCompoundOrgan / stageInteractorInteractor roleSecond interactorSecond interactor roleComparatorSettingValueQualifier

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Zea mays subsp. mays
Zea mays subsp. mays · TaxonDominicus Johannes Bergsma · CC BY-SA 4.0 · Wikimedia Commons ↗

Verbatim

e0

“Corn yield declined only at a glyphosate rate of 225 g/ha and below.”

✓ located verbatim in the source · abstract, characters 810–878

Title

Response of Barnyardgrass (Echinochloa crus-galli) to Glyphosate Application Timing and Rate in Glyphosate-Resistant Corn (Zea mays)1

PETER H. SIKKEMA; CHRISTY SHROPSHIRE; ALLAN S. HAMILL; et al. Weed Technology 2005. doi:10.1614/wt-03-106r1.1

Other claims from this paper (10)

Record rev-dbf0891ffff1084cb0e254c697dfbaac96e4f7d966e57e0b3161a7f7eeb0d4fd · schema claims-v0.9 · position 8 in the model’s answer

glyphosate · yield · Zea mays (maize)Results differ

77 papers: 42 positive, 35 negative or no effect

34 papers in the same direction as this claim · 42 in the opposite direction

  1. negative
    Corn yield declined only below 450 g/ha glyphosate.

    Response of Common Lambsquarters (Chenopodium album) to Glyphosate Application Timing and Rate in Glyphosate-Resistant Corn · 2004

    Same directionCited by this paper

  2. positive
    Two glyphosate applications gave higher corn grain yields than a single application when weeds were 5 cm tall or less.

    Effect of Postemergence Glyphosate Application Timing on Weed Control and Grain Yield in Glyphosate-Resistant Corn: Results of a 2-Yr Multistate Study1 · 2003 · compared with a single application

    Opposite direction

  3. positive
    Adding glyphosate to atrazine sometimes improved corn yields when applied after wheat harvest, compared with atrazine alone.

    Herbicide Applications on Wheat and Stubble for No‐Tillage Corn1 · 1986 · compared with atrazine alone

    Opposite direction

  4. positive
    Glyphosate applied broadcast gave the highest corn yield (11,300 kg/ha) compared with a banded application (10,160 kg/ha).

    Live and Killed Hairy Vetch Cover Crop Effects on Weeds and Yield in Glyphosate-Resistant Corn · 2004 · compared with a banded application

    Opposite direction

  5. positive
    GG2 tolerated 9000 g acid equivalent glyphosate per hectare without a phenotype or yield effect.

    In maize, co-expression of GAT and GR79-EPSPS provides high glyphosate resistance, along with low glyphosate residues · 2023

    Opposite direction

  6. positive
    Under weed-free conditions without glyphosate, several sweet corn yield traits were higher with GR+Bt.

    Goss’s Wilt Incidence in Sweet Corn Is Independent of Transgenic Traits and Glyphosate · 2015

    Opposite direction

  7. positive
    Sequential glyphosate at at least 1.26 kg/ha increased corn yield relative to single applications.

    Yellow Nutsedge (Cyperus esculentus) and Annual Weed Control in Glyphosate-Resistant Field Corn (Zea mays)1 · 2002 · compared with single glyphosate applications

    Opposite direction

  8. positive
    Corn yields under POST KIH-485 plus glyphosate matched the weed-free control.

    Control of Acetolactate Synthase–Resistant Shattercane (Sorghum Bicolor) in Field Corn with Kih-485 · 2007 · compared with WFC

    Opposite direction

68 papers more in this group

See all 77 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.