Paper · 1975 · PubMed

Crop rotation and herbicide effects on population densities of plant-parasitic nematodes.

A W Johnson; C C Dowler; E W Hauser

12
claims
24
verbatim quotes
21
citations
2
research areas
✓
Open access

Abstract

The influence of herbicides and mono- and multicropping sequences on population densities of nematode species common in corn, cotton, peanut, and soybean fields in the southeastern United States was studied for 4 years. Each experimental plot was sampled at monthly intervals. The application of herbicides did not significantly affect nematode population densities. Meloidogyne incognita and Trichodorus christiei increased rapidly on corn and cotton, but were suppressed by peanut and soybean. More Pratylenchus spp. occurred on corn and soybean than on cotton and peanut. Criconemoides ornatus increased rapidly on corn and peanut, but was suppressed by cotton and soybean. Helicotylenchus dihystera was more numerous on cotton and soybean than on corn and peanut. Numbers of Xiphinema americanum remained low on all crops. The peanut sequence was the most effective monocrop system for suppressing most nematode species. Multi-crop systems, corn-peanut-cotton-soybean and cotton-soybean-corn-peanut, were equally effective in suppressing nematode densities.

Abstract from the paper’s OpenAlex record, shown for indexing and research. Copyright remains with the authors or the publisher. Read at the source ↗

The text the model read, with the source record’s inline markup (italics, sub- and superscripts) rendered and its character entities decoded; quote offsets refer to the raw text.

Claims 12

Associationobservedoriginal resultno effectnot significant (as stated)measured

Claim · model-written summary

Herbicide application did not significantly affect nematode population densities.

Treatment
application of herbicidese0
Interactor
plant-parasitic nematodest0pest
Outcome
nematode population densitiese0
Direction
no_changeinferrede0

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

Gossypium hirsutum
Gossypium hirsutum · TaxonChriKo · CC BY-SA 3.0 · Wikimedia Commons ↗
Arachis hypogaea
Arachis hypogaea · Taxon葉子 · CC0 · iNaturalist ↗
Glycine max
Glycine max · TaxonPublic domain · Wikimedia Commons ↗
Zea mays subsp. mays
Zea mays subsp. mays · TaxonDominicus Johannes Bergsma · CC BY-SA 4.0 · Wikimedia Commons ↗

Verbatim

t0

“Crop rotation and herbicide effects on population densities of plant-parasitic nematodes.”

✓ located verbatim in the source · title, characters 0–89 · show in text ↑
e0

“The application of herbicides did not significantly affect nematode population densities”

✓ located verbatim in the source · abstract, characters 277–365 · show in text ↑
e1

“nematode species common in corn, cotton, peanut, and soybean fields”

✓ located verbatim in the source · abstract, characters 93–160 · show in text ↑
Intervention effectobservedoriginal resultnegativemeasured

Claim · model-written summary

Meloidogyne incognita increased on corn and cotton compared with peanut and soybean.

Treatment
corn and cottone0
Interactor
Meloidogyne incognitaMeloidogyne incognitae0pest
Outcome
Meloidogyne incognitae0
Direction
increasede0
Comparator
peanut and soybeane0

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

Gossypium hirsutum
Gossypium hirsutum · TaxonChriKo · CC BY-SA 3.0 · Wikimedia Commons ↗
Arachis hypogaea
Arachis hypogaea · Taxon葉子 · CC0 · iNaturalist ↗
Glycine max
Glycine max · TaxonPublic domain · Wikimedia Commons ↗
Zea mays subsp. mays
Zea mays subsp. mays · TaxonDominicus Johannes Bergsma · CC BY-SA 4.0 · Wikimedia Commons ↗

Verbatim

e0

“Meloidogyne incognita and Trichodorus christiei increased rapidly on corn and cotton, but were suppressed by peanut and soybean”

✓ located verbatim in the source · abstract, characters 367–494 · show in text ↑
e1

“nematode species common in corn, cotton, peanut, and soybean fields”

✓ located verbatim in the source · abstract, characters 93–160 · show in text ↑
Intervention effectobservedoriginal resultnegativemeasured

Claim · model-written summary

Trichodorus christiei increased on corn and cotton compared with peanut and soybean.

Treatment
corn and cottone0
Interactor
Trichodorus christieie0pest
Outcome
Trichodorus christieie0
Direction
increasede0
Comparator
peanut and soybeane0

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

Gossypium hirsutum
Gossypium hirsutum · TaxonChriKo · CC BY-SA 3.0 · Wikimedia Commons ↗
Arachis hypogaea
Arachis hypogaea · Taxon葉子 · CC0 · iNaturalist ↗
Glycine max
Glycine max · TaxonPublic domain · Wikimedia Commons ↗
Zea mays subsp. mays
Zea mays subsp. mays · TaxonDominicus Johannes Bergsma · CC BY-SA 4.0 · Wikimedia Commons ↗

Verbatim

e0

“Meloidogyne incognita and Trichodorus christiei increased rapidly on corn and cotton, but were suppressed by peanut and soybean”

✓ located verbatim in the source · abstract, characters 367–494 · show in text ↑
e1

“nematode species common in corn, cotton, peanut, and soybean fields”

✓ located verbatim in the source · abstract, characters 93–160 · show in text ↑
Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

Meloidogyne incognita was suppressed by peanut and soybean compared with corn and cotton.

Treatment
peanut and soybeane0
Interactor
Meloidogyne incognitaMeloidogyne incognitae0pest
Outcome
Meloidogyne incognitae0
Direction
suppressede0
Comparator
corn and cottone0

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

Gossypium hirsutum
Gossypium hirsutum · TaxonChriKo · CC BY-SA 3.0 · Wikimedia Commons ↗
Arachis hypogaea
Arachis hypogaea · Taxon葉子 · CC0 · iNaturalist ↗
Glycine max
Glycine max · TaxonPublic domain · Wikimedia Commons ↗
Zea mays subsp. mays
Zea mays subsp. mays · TaxonDominicus Johannes Bergsma · CC BY-SA 4.0 · Wikimedia Commons ↗

Verbatim

e0

“Meloidogyne incognita and Trichodorus christiei increased rapidly on corn and cotton, but were suppressed by peanut and soybean”

✓ located verbatim in the source · abstract, characters 367–494 · show in text ↑
e1

“nematode species common in corn, cotton, peanut, and soybean fields”

✓ located verbatim in the source · abstract, characters 93–160 · show in text ↑
Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

Trichodorus christiei was suppressed by peanut and soybean compared with corn and cotton.

Treatment
peanut and soybeane0
Interactor
Trichodorus christieie0pest
Outcome
Trichodorus christieie0
Direction
suppressede0
Comparator
corn and cottone0

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

Gossypium hirsutum
Gossypium hirsutum · TaxonChriKo · CC BY-SA 3.0 · Wikimedia Commons ↗
Arachis hypogaea
Arachis hypogaea · Taxon葉子 · CC0 · iNaturalist ↗
Glycine max
Glycine max · TaxonPublic domain · Wikimedia Commons ↗
Zea mays subsp. mays
Zea mays subsp. mays · TaxonDominicus Johannes Bergsma · CC BY-SA 4.0 · Wikimedia Commons ↗

Verbatim

e0

“Meloidogyne incognita and Trichodorus christiei increased rapidly on corn and cotton, but were suppressed by peanut and soybean”

✓ located verbatim in the source · abstract, characters 367–494 · show in text ↑
e1

“nematode species common in corn, cotton, peanut, and soybean fields”

✓ located verbatim in the source · abstract, characters 93–160 · show in text ↑
Intervention effectobservedoriginal resultnegativemeasured

Claim · model-written summary

Pratylenchus spp. occurred more on corn and soybean than on cotton and peanut.

Treatment
corn and soybeane0
Interactor
Pratylenchus spp.Pratylenchuse0pest
Outcome
Pratylenchus spp.e0
Direction
Moree0
Comparator
cotton and peanute0

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

Gossypium hirsutum
Gossypium hirsutum · TaxonChriKo · CC BY-SA 3.0 · Wikimedia Commons ↗
Arachis hypogaea
Arachis hypogaea · Taxon葉子 · CC0 · iNaturalist ↗
Glycine max
Glycine max · TaxonPublic domain · Wikimedia Commons ↗
Zea mays subsp. mays
Zea mays subsp. mays · TaxonDominicus Johannes Bergsma · CC BY-SA 4.0 · Wikimedia Commons ↗

Verbatim

e0

“More Pratylenchus spp. occurred on corn and soybean than on cotton and peanut”

✓ located verbatim in the source · abstract, characters 496–573 · show in text ↑
e1

“nematode species common in corn, cotton, peanut, and soybean fields”

✓ located verbatim in the source · abstract, characters 93–160 · show in text ↑
Intervention effectobservedoriginal resultnegativemeasured

Claim · model-written summary

Criconemoides ornatus increased on corn and peanut compared with cotton and soybean.

Treatment
corn and peanute0
Interactor
Criconemoides ornatusMesocriconema ornatume0pest
Outcome
Criconemoides ornatuse0
Direction
increasede0
Comparator
cotton and soybeane0

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

Gossypium hirsutum
Gossypium hirsutum · TaxonChriKo · CC BY-SA 3.0 · Wikimedia Commons ↗
Arachis hypogaea
Arachis hypogaea · Taxon葉子 · CC0 · iNaturalist ↗
Glycine max
Glycine max · TaxonPublic domain · Wikimedia Commons ↗
Zea mays subsp. mays
Zea mays subsp. mays · TaxonDominicus Johannes Bergsma · CC BY-SA 4.0 · Wikimedia Commons ↗

Verbatim

e0

“Criconemoides ornatus increased rapidly on corn and peanut, but was suppressed by cotton and soybean”

✓ located verbatim in the source · abstract, characters 575–675 · show in text ↑
e1

“nematode species common in corn, cotton, peanut, and soybean fields”

✓ located verbatim in the source · abstract, characters 93–160 · show in text ↑
Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

Criconemoides ornatus was suppressed by cotton and soybean compared with corn and peanut.

Treatment
cotton and soybeane0
Interactor
Criconemoides ornatusMesocriconema ornatume0pest
Outcome
Criconemoides ornatuse0
Direction
suppressede0
Comparator
corn and peanute0

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

Gossypium hirsutum
Gossypium hirsutum · TaxonChriKo · CC BY-SA 3.0 · Wikimedia Commons ↗
Arachis hypogaea
Arachis hypogaea · Taxon葉子 · CC0 · iNaturalist ↗
Glycine max
Glycine max · TaxonPublic domain · Wikimedia Commons ↗
Zea mays subsp. mays
Zea mays subsp. mays · TaxonDominicus Johannes Bergsma · CC BY-SA 4.0 · Wikimedia Commons ↗

Verbatim

e0

“Criconemoides ornatus increased rapidly on corn and peanut, but was suppressed by cotton and soybean”

✓ located verbatim in the source · abstract, characters 575–675 · show in text ↑
e1

“nematode species common in corn, cotton, peanut, and soybean fields”

✓ located verbatim in the source · abstract, characters 93–160 · show in text ↑
Intervention effectobservedoriginal resultnegativemeasured

Claim · model-written summary

Helicotylenchus dihystera was more numerous on cotton and soybean than on corn and peanut.

Treatment
cotton and soybeane0
Interactor
Helicotylenchus dihysteraHelicotylenchus dihysterae0pest
Outcome
Helicotylenchus dihysterae0
Direction
more numerouse0
Comparator
corn and peanute0

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

Gossypium hirsutum
Gossypium hirsutum · TaxonChriKo · CC BY-SA 3.0 · Wikimedia Commons ↗
Arachis hypogaea
Arachis hypogaea · Taxon葉子 · CC0 · iNaturalist ↗
Glycine max
Glycine max · TaxonPublic domain · Wikimedia Commons ↗
Zea mays subsp. mays
Zea mays subsp. mays · TaxonDominicus Johannes Bergsma · CC BY-SA 4.0 · Wikimedia Commons ↗

Verbatim

e0

“Helicotylenchus dihystera was more numerous on cotton and soybean than on corn and peanut”

✓ located verbatim in the source · abstract, characters 677–766 · show in text ↑
e1

“nematode species common in corn, cotton, peanut, and soybean fields”

✓ located verbatim in the source · abstract, characters 93–160 · show in text ↑
Observationobservedoriginal resultpositivemeasured

Claim · model-written summary

Xiphinema americanum numbers remained low on all crops.

Interactor
Xiphinema americanumXiphinema americanume0pest
Outcome
Numbers of Xiphinema americanume0
Direction
remained lowe0

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

Gossypium hirsutum
Gossypium hirsutum · TaxonChriKo · CC BY-SA 3.0 · Wikimedia Commons ↗
Arachis hypogaea
Arachis hypogaea · Taxon葉子 · CC0 · iNaturalist ↗
Glycine max
Glycine max · TaxonPublic domain · Wikimedia Commons ↗
Zea mays subsp. mays
Zea mays subsp. mays · TaxonDominicus Johannes Bergsma · CC BY-SA 4.0 · Wikimedia Commons ↗

Verbatim

e0

“Numbers of Xiphinema americanum remained low on all crops”

✓ located verbatim in the source · abstract, characters 768–825 · show in text ↑
e1

“nematode species common in corn, cotton, peanut, and soybean fields”

✓ located verbatim in the source · abstract, characters 93–160 · show in text ↑
Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

The peanut sequence was the most effective monocrop system for suppressing most nematode species.

Treatment
peanut sequencee0
Interactor
nematode speciesNematodae0pest
Outcome
suppressing most nematode speciese0
Direction
most effectivee0
Comparator
monocrop systeme0

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

Arachis hypogaea
Arachis hypogaea · Taxon葉子 · CC0 · iNaturalist ↗

Verbatim

e0

“The peanut sequence was the most effective monocrop system for suppressing most nematode species”

✓ located verbatim in the source · abstract, characters 827–923 · show in text ↑
Associationobservedoriginal resultpositivemeasured

Claim · model-written summary

Multi-crop systems were equally effective in suppressing nematode densities.

Treatment
Multi-crop systemse0
Outcome
suppressing nematode densitiese0
Direction
equally effectivee0

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

Gossypium hirsutum
Gossypium hirsutum · TaxonChriKo · CC BY-SA 3.0 · Wikimedia Commons ↗
Arachis hypogaea
Arachis hypogaea · Taxon葉子 · CC0 · iNaturalist ↗
Glycine max
Glycine max · TaxonPublic domain · Wikimedia Commons ↗
Zea mays subsp. mays
Zea mays subsp. mays · TaxonDominicus Johannes Bergsma · CC BY-SA 4.0 · Wikimedia Commons ↗

Verbatim

e0

“Multi-crop systems, corn-peanut-cotton-soybean and cotton-soybean-corn-peanut, were equally effective in suppressing nematode densities”

✓ located verbatim in the source · abstract, characters 925–1060 · show in text ↑
e1

“nematode species common in corn, cotton, peanut, and soybean fields”

✓ located verbatim in the source · abstract, characters 93–160 · show in text ↑

Zea mays subsp. mays · Meloidogyne incognita · Arachis hypogaea (peanut)Positive and negative results

2 papers: 1 positive, 1 negative or no effect

1 in the opposite direction

  1. positive
See all 2 papers →

Zea mays subsp. mays · organism · Arachis hypogaea (peanut)Positive and negative results

2 papers: 1 positive, 1 negative or no effect

1 in the opposite direction

  1. positive
See all 2 papers →

Gossypium hirsutum · organism · Zea mays (maize)Positive and negative results

2 papers: 1 positive, 1 negative or no effect

1 in the opposite direction

  1. positive
See all 2 papers →

Arachis hypogaea · organism · Glycine max (soybean)Positive and negative results

2 papers: 1 positive, 1 negative or no effect

1 in the opposite direction

  1. negative
See all 2 papers →

Gossypium hirsutum · organism · Glycine max (soybean)Positive and negative results

3 papers: 1 positive, 2 negative or no effect

1 paper in the same direction as this paper · 1 in the opposite direction

  1. positive
  2. no effect
See all 3 papers →

Zea mays subsp. mays · organism · Glycine max (soybean)Positive and negative results

9 papers: 3 positive, 6 negative or no effect

5 papers in the same direction as this paper · 3 in the opposite direction

  1. positive
  2. positive
  3. positive

5 papers more in this group

See all 9 papers →

Glycine max · organism · Zea mays (maize)Positive and negative results

12 papers: 10 positive, 2 negative or no effect

9 papers in the same direction as this paper · 2 in the opposite direction

  1. no effect
  2. no effect
  3. positive

8 papers more in this group

See all 12 papers →

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

25 papers: 13 positive, 12 negative or no effect

11 papers in the same direction as this paper · 13 in the opposite direction

  1. positive
  2. positive
  3. positive

21 papers more in this group

See all 25 papers →

8 of 13 groups shown: named compounds and organisms first, then groups whose results differ (checked claim by claim), then those with positive and negative results, then the smaller groups.

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.