Intervention effectmodel-written summary

Insecticide protection from insect damage could raise cowpea yield by more than tenfold.

A claim from U.l.v. Spraying for Cowpea in Northern Nigeria · 1976

Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

Insecticide protection from insect damage could raise cowpea yield by more than tenfold.

Treatment
insecticide applicationse0
Outcome
yielde0
Direction
increasee0
Value
More than ten-folde0
Qualifier
may be obtainede0

Not reportedMaterialGeneCompoundOrgan / stageInteractorInteractor roleSecond interactorSecond interactor roleComparatorSetting

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

Vigna unguiculata
Vigna unguiculata · TaxonHeraldDesa at English Wikipedia · CC BY-SA 3.0 · Wikimedia Commons ↗

Verbatim

e0

“More than ten-fold increase in yield may be obtained from a crop protected from insect damage by insecticide applications.”

✓ located verbatim in the source · abstract, characters 234–356
t0

“Cowpea”

✓ located verbatim in the source · title, characters 20–26

Title

U.l.v. Spraying for Cowpea in Northern Nigeria

A. K. Raheja PANS 1976. doi:10.1080/09670877609412067

Other claims from this paper (1)

Record rev-7fef211fac3a33d21745455d593626ebd0ff50cafadefd32348dcbde60bb10b5 · schema claims-v0.9 · position 2 in the model’s answer

insecticide · yield · Vigna unguiculata (cowpea)Positive and negative results

28 papers: 24 positive, 4 negative or no effect

23 papers in the same direction as this claim · 4 in the opposite direction

  1. negative
    Insecticidal treatment also reduced cowpea haulm production.

    Pests of cowpea and their control in Northern Nigeria · 1965

    Opposite directionCited by this paper

  2. no effect
    Cowpea grain yields did not differ significantly among insecticide treatments.

    Field evaluation of some insecticides for the control of insect pests of cowpea(Vigna unguiculata(L.) Walp.) in the Sudan savanna of Nigeria · 1994

    Opposite directionCites this paper

  3. positive
    Two sprays at 10 day intervals from flower bud formation gave the highest economic grain yield in IT84S‐2246.

    Insecticide application for economic production of cowpea grains in the northern Sudan savanna of Nigeria · 1995

    Same directionCites this paper

  4. positive
    Insecticide application increased cowpea grain yield by 75-126%, depending on spray frequency.

    Cultivar and insecticide spraying regimes effects on insect pests and grain yield of cowpea in the dry savannas of north-eastern Nigeria. · 2007

    Same directionCites this paper

  5. no effect
    The combination of insecticides showed no adverse influence on cowpea yield.

    Effect of Lambda-Cyhalothrin and Dimethoate on the Growth Response of Cowpea Plants and the Surrounding Soil · 2021

    Opposite direction

  6. no effect
    Fresh market cowpeas grown without any insecticide application showed no apparent loss in yield in Tuskegee trials.

    GROWING SOUTHERNPEAS WITHOUT INSECTICIDES IN SOUTH-CENTRAL ALABAMA IS THIS AN ABERRATION OR A SUSTAINABLE TREND? · 2005

    Opposite direction

  7. positive
    Two insecticide sprays of Cypermethrin + dimethoate increased cowpea grain yields considerably from 225 to 900 kg ha-1 for cowpea planted in July and August.

    Integrated management of cowpea insect pests using elite cultivars, date of planting and minimum insecticide application · 2001

    Same direction

  8. positive
    Three insecticide applications increased pods, pod weight, seed weight and seeds per pod compared with untreated cowpea.

    Effects of insecticide spray application on insect pest infestation and yield of cowpea (Vigna unguiculata (L.) Walp.) in the Transkei, South Africa · 2010 · compared with untreated control

    Same direction

19 papers more in this group

See all 28 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.