Intervention effectmodel-written summary

Bt corn had fewer S. frugiperda larvae.

A claim from Impact of Bt sweet corn on lepidopteran pests in Midwestern Brazil · 2019

Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

Bt corn had fewer S. frugiperda larvae.

Treatment
Bt corne0
Interactor
S. frugiperdaSpodoptera frugiperdae0pest
Outcome
number of larvaee0
Direction
lowere0

Not reportedMaterialGeneCompoundOrgan / stageSecond 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 ↗
Spodoptera frugiperda
Spodoptera frugiperda · InteractorUSGS Bee Inventory and Monitoring Lab from Beltsville, Maryland, USA · Public domain · Wikimedia Commons ↗

Verbatim

e0

“The number of larvae (S. frugiperda and Helicoverpa spp.) sampled was also lower in the treatments with Bt corn.”

✓ located verbatim in the source · abstract, characters 1304–1416

Title

Impact of Bt sweet corn on lepidopteran pests in Midwestern Brazil

Altair Marcos Schneider; Lessando Moreira Gontijo; Lilian Lucia Costa Scientia Agricola 2019. doi:10.1590/1678-992x-2017-0176

Other claims from this paper (6)

Record rev-bb14277fa359b17f56f2bb5b893e3d72a83601a875bf503e979cebfcaef37917 · schema claims-v0.9 · position 3 in the model’s answer

Zea mays subsp. mays · Spodoptera frugiperda · Zea mays (maize)Positive and negative results

12 papers: 9 positive, 3 negative or no effect

8 papers in the same direction as this claim · 3 in the opposite direction

  1. negative
    Larvae reared on corn had a significantly shorter larval duration (16.2 d) and pupal duration of 8.9 d.

    Performance of Spodoptera frugiperda (Lepidoptera: Noctuidae) Fed on Six Host Plants: Potential Risks to Mid-high Latitude Crops in China · 2020

    Opposite direction

  2. negative
    S. frugiperda damage and numbers were significantly higher in non-Bt mid- and late-season corn.

    Insect Populations on Bacillus thuringiensis Transgenic Sweet Corn · 2002

    Opposite direction

  3. negative
    Corn leaf feed yielded the shortest larval development time, 13.55 days.

    Several local food plants with the potential as hosts for Spodoptera frugiperda (Lepidoptera: Noctuidae) · 2022

    Opposite direction

  4. positive
    Females laid more eggs on controls than areas treated with corn leaf extract.

    Chemical and Tactile Cues Influencing Oviposition of a Generalist Moth, Spodoptera frugiperda (Lepidoptera: Noctuidae) · 2003 · compared with control areas

    Same direction

  5. positive
    Corn leaf water extracts reduced fall armyworm oviposition on treated towels.

    Oviposition Deterrents for Fall Armyworm (Lepidoptera: Noctuidae) from Larval Frass, Corn Leaves, and Artificial Diet1 · 1986 · compared with towels treated only with the solvent

    Same direction

  6. positive
    Vip trait corn caused 100% mortality of S. frugiperda larvae from neonates through fifth instar.

    Resistance Risk Assessment ofSpodoptera frugiperda(Lepidoptera: Noctuidae) andDiatraea saccharalis(Lepidoptera: Crambidae) to Vip3Aa20 Insecticidal Protein Expressed in Corn · 2015

    Same direction

  7. positive
    Pyramided Bt corn products are effective in protecting against S. frugiperda.

    Susceptibility of Louisiana and Florida Populations ofSpodoptera frugiperda(Lepidoptera: Noctuidae) to Pyramided Bt Corn Containing Genuity®Vt Double Pro™and Smartstax™Traits · 2013

    Same direction

  8. positive
    Armyworm damage was lower in MON810 corn than in the control plot.

    Genetically modified corn on fall armyworm and earwig populations under field conditions · 2014 · compared with control plot

    Same direction

3 papers more in this group

See all 12 papers →

transgenic · Spodoptera frugiperda · Zea mays (maize)Positive and negative results

16 papers: 14 positive, 2 negative or no effect

13 papers in the same direction as this claim · 2 in the opposite direction

  1. negative
    Cry1F-based and pyramided Bt maize products showed reduced efficacy and control failure against natural populations of S. frugiperda in field trials in south Florida.

    Cry1F Resistance in Fall Armyworm Spodoptera frugiperda: Single Gene versus Pyramided Bt Maize · 2014

    Opposite direction

  2. negative
    The Pieris rapae granulosis virus combined with 5% Bt lowered parasitism rates in Nyankpala.

    Comparative effects of biopesticides on fall armyworm management and larval parasitism rates in northern Ghana · 2023

    Opposite direction

  3. positive
    At 90% Bt coverage in Yunnan, S. frugiperda pressure stayed below thresholds.

    Bt maize can provide non‐chemical pest control and enhance food safety in China · 2022

    Same direction

  4. positive
    NAHA maize callus reduced fall armyworm survivor growth relative to control cDNA callus.

    Oral Toxicity of β-N-Acetyl Hexosaminidase to Insects · 2007 · compared with callus that expressed control cDNAs

    Same direction

  5. positive
    Prey larvae fed non-Bt maize leaves were significantly larger than larvae fed Bt maize leaves.

    Harmonia axyridis (Coleoptera: Coccinellidae) Exhibits No Preference between Bt and Non-Bt Maize Fed Spodoptera frugiperda (Lepidoptera: Noctuidae) · 2012 · compared with non-Bt leaves

    Same direction

  6. positive
    Pyramided Bt corn products are effective in protecting against S. frugiperda.

    Susceptibility of Louisiana and Florida Populations ofSpodoptera frugiperda(Lepidoptera: Noctuidae) to Pyramided Bt Corn Containing Genuity®Vt Double Pro™and Smartstax™Traits · 2013

    Same direction

  7. positive
    Bt maize effectively managed seedling cutting injury from fall armyworm.

    Efficacy of Bacillus thuringiensis (Bt) maize expressing Cry1F, Cry1A.105, Cry2Ab2 and Vip3Aa20 proteins to manage the fall armyworm (Lepidoptera: Noctuidae) in Brazil · 2020

    Same direction

  8. positive
    All Bt corn hybrids reduced fall armyworm infestation more effectively than multiple sprays.

    Evaluation of Insecticide Thresholds in Late-Planted Bt and Non-Bt Corn for Management of Fall Armyworm (Lepidoptera: Noctuidae) · 2019 · compared with multiple insecticide sprays

    Same direction

7 papers more in this group

See all 16 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.