Intervention effectmodel-written summary

Supplementary hoeing or paraquat could attain yields comparable with season long weed free plots.

A claim from Competition and control of itchgrass(rottboellia exaltata)in maize(zea mays) · 1986

Intervention effectauthor interpretationoriginal resultpositivemeasured

Claim · model-written summary

Supplementary hoeing or paraquat could attain yields comparable with season long weed free plots.

Taxon
maizeZea mayst0
Treatment
Supplementary post‐emergence control by hoeing or using paraquate0
Outcome
yieldse0
Direction
comparablee0
Comparator
plots kept weed free throughout the growing periode0

Not reportedMaterialGeneCompoundOrgan / stageInteractorInteractor roleSecond interactorSecond interactor roleSettingValueQualifier

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

Zea mays
Zea mays · TaxonAkwugo · CC BY-SA 4.0 · Wikimedia Commons ↗

Verbatim

t0

“maize”

✓ located verbatim in the source · title, characters 61–66
e0

“Supplementary post‐emergence control by hoeing or using paraquat could help attain yields comparable to those obtained in the plots kept weed free throughout the growing period.”

✓ located verbatim in the source · abstract, characters 569–746

Title

Competition and control of itchgrass(rottboellia exaltata)in maize(zea mays)

D. Sharma; O. Zelaya Tropical Pest Management 1986. doi:10.1080/09670878609371039

Other claims from this paper (3)

Record rev-effe30c8b3682b84e26b9946d894fe1df503705e60f8eb43e1f7d697f59694c0 · schema claims-v0.9 · position 4 in the model’s answer

paraquat · yield · Zea mays (maize)Results differ

16 papers: 8 positive, 8 negative or no effect

7 papers in the same direction as this claim · 6 in the opposite direction · 2 reporting no difference from an alternative

  1. no effect
    Paraquat at 0.84 kg/ha did not affect replanted corn yield.

    Herbicide Options for Controlling Glyphosate-Tolerant Corn in a Corn Replant Situation · 2009

    Opposite direction

  2. no effect
    Glyphosate, Paraquat and Atrazine gave maize dry matter accumulation similar to the hand-weeded control.

    Growth and yield of maize (Zea mays L.) in response to herbicide application in the coastal savannah ecozone of Ghana · 2013 · compared with control

    Opposite direction

  3. negative
    Corn yield loss occurred after all paraquat exposure times except PRE, compared with the nontreated control.

    Corn (Zea mays L.) response to sublethal rates of paraquat and fomesafen at vegetative growth stages · 2019 · compared with NTC

    Opposite direction

  4. negative
    Paraquat-simulated frost reduced yield by about 1000 kg/ha for each week it occurred before maturity.

    EFFECT OF SIMULATED FROST INJURY INDUCED BY PARAQUAT ON KERNEL GROWTH AND DEVELOPMENT IN CORN · 1980

    Opposite direction

  5. negative
    A single paraquat application before direct drilling yielded 41% of weed-free direct-drilled maize.

    The effect of cultivation, lime, nitrogen, seed type, and weed control on the growth of high density forage maize · 1980 · compared with maize directly drilled into a weed‐free seedbed

    Opposite direction

  6. negative
    Paraquat reduced corn yield by more than 50%.

    Effects of Shielded Spray of Paraquat and Glyphosate on the Growth and Yield of Corn (Zea mays L.) · 1992

    Opposite direction

  7. no effect
    No-tillage corn in rye treated with paraquat plus residual herbicides generally yielded about the same as conventionally planted corn.

    Planting Corn in Sod and Small Grain Residues with Minimum Tillage1 · 1976 · compared with conventionally planted corn

    No difference from an alternative

  8. no effect
    Paraquat and glyphosate treatments gave maize grain yield at par with atrazine.

    Management of complex weed flora in maize with post-emergence herbicides · 2016 · compared with atrazine

    No difference from an alternative

7 papers more in this group

See all 16 papers →

herbicide · yield · Zea mays (maize)Positive and negative results

651 papers: 500 positive, 151 negative or no effect

499 papers in the same direction as this claim · 127 in the opposite direction · 24 reporting no difference from an alternative

  1. positive
    Adding preemergence herbicide to the cover crop modestly improved corn yield.

    Integrated management of itchgrass in a corn cropping system: modeling the effect of control tactics · 2001 · compared with cover crop

    Same directionCites this paper

  2. positive
    Longer weed-free periods increased maize yield exponentially.

    The effects of Rottboellia cochinchinensis on the growth, development and yield of maize · 1992

    Same directionCites this paper

  3. negative
    Without herbicide, yield was reduced regardless of row spacing or population.

    Influence of Narrow Row/High Population Corn (Zea mays) on Weed Control and Light Transmittance · 1995

    Opposite direction

  4. negative
    Lack of weed control reduced green ear yield and grain yield of corn.

    Corn yield response to weed and fall armyworm controls · 2010 · compared with weed control

    Opposite direction

  5. no effect
    Herbicide-treated plots had no significant corn grain yield difference from handweeded plots.

    Effect of Postemergence Application Rate and Timing of Mesotrione on Corn (Zea mays) Response and Weed Control1 · 2002 · compared with handweeded plots

    Opposite direction

  6. negative
    Withholding herbicides reduced continuous corn yield by 10 to 27% in ridge tillage.

    Weed Seed Populations in Ridge and Conventional Tillage · 1988

    Opposite direction

  7. negative
    Corn yields in narrow rows with reduced herbicide were about 10% below wide rows with full herbicide.

    Effect of row width on herbicide and cultivation requirements in row crops · 1992 · compared with WR with 100% RAR

    Opposite direction

  8. no effect
    Under conventional tillage, several herbicide treatments gave corn yield similar to weed-free conditions.

    Influence of Tillage Systems on Giant Foxtail,Setaria faberi, and Velvetleaf,Abutilon theophrasti, Density and Control in Corn,Zea mays · 1988 · compared with weed-free

    Opposite direction

642 papers more in this group

See all 651 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.