Paper · 2025 · Frontiers in Plant Science

The nematicidal potential of Moringa oleifera extracts and rhizobacteria against Meloidogyne incognita in tomato

Wajahat Azeem; Tariq Mukhtar; Muhammad Inam-ul-Haq; et al.

14
claims
31
verbatim quotes
19
citations
2
research areas
✓
Open access · cc-by

Abstract

Here we report the effects of aqueous extracts of the plant Moringa oleifera and rhizobacterial strains, Bacillus australimaris (BA-LWD73) and B. thuringiensis (BT-WAG41), applied singly and in combination, on tomato growth and Meloidogyne incognita infection. Plant height, root length, shoot and root biomass (fresh and dry), were significantly increased by most treatments compared to the control. The combined treatment of BA-LWD73 + M. oleifera produced the highest plant height (96.94 cm) and root length (30.48 cm). The highest shoot biomass was observed in BA-LWD73 alone treatment while root biomass was generally lower in all treatments than in the control. M. incognita induced, root gall rating, number of eggs per root system, second stage juveniles (J2), and reproduction rate, were significantly reduced in treatments involving M. oleifera and BA-LWD73, either alone or in combination. The lowest root gall rating (2.67) and J2 count (680) were observed in B. australimaris LWD73 + M. oleifera treatment. FTIR analysis of M. oleifera extract indicated the presence of functional groups such as hydroxyl, C=C, S=O, and C–O, suggesting bioactive potential. GC-MS analysis revealed six phytocompounds, with 5-Hydroxymethylfurfural (71.76%) as the dominant component, all known for antimicrobial and nematicidal activities. Moreover, volatile organic compounds from BA-LWD73 included 1H-Indole (87.46%) and 2-Nonanone (6.54%), known for their nematicidal properties. These findings highlight the potential of rhizobacteria and plant extracts in promoting tomato growth and suppressing M. incognita infection.

Abstract from the paper’s OpenAlex record; open copy licensed cc-by. 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 14

Intervention effectobservedoriginal resultpositivesignificant (as stated)measured

Claim · model-written summary

Aqueous extracts of M. oleifera and rhizobacteria increased plant height, root length, and shoot and root biomass in tomato compared with the control, in most treatments.

Treatment
aqueous extracts of the plant Moringa oleifera and rhizobacterial strainse0
Outcome
Plant height, root length, shoot and root biomasse1
Direction
increasede1
Qualifier
by most treatmentse1
Comparator
the controle1

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

Solanum lycopersicum
Solanum lycopersicum · TaxonKod B · CC BY-SA 4.0 · Wikimedia Commons ↗

Verbatim

t0

“Meloidogyne incognita in tomato”

✓ located verbatim in the source · title, characters 81–112 · show in text ↑
e0

“effects of aqueous extracts of the plant Moringa oleifera and rhizobacterial strains”

✓ located verbatim in the source · abstract, characters 19–103 · show in text ↑
e1

“Plant height, root length, shoot and root biomass (fresh and dry), were significantly increased by most treatments compared to the control”

✓ located verbatim in the source · abstract, characters 261–399 · show in text ↑
Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

The combined BA-LWD73 and M. oleifera treatment gave the highest plant height in tomato, 96.94 cm.

Treatment
combined treatment of BA-LWD73 + M. oleiferae2
Interactor
BA-LWD73e2biocontrol_agent
Outcome
plant heighte2
Direction
higheste2
Value
96.94 cme2

Not reportedComparator

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

Solanum lycopersicum
Solanum lycopersicum · TaxonKod B · CC BY-SA 4.0 · Wikimedia Commons ↗

Verbatim

t0

“Meloidogyne incognita in tomato”

✓ located verbatim in the source · title, characters 81–112 · show in text ↑
e2

“The combined treatment of BA-LWD73 + M. oleifera produced the highest plant height (96.94 cm) and root length (30.48 cm)”

✓ located verbatim in the source · abstract, characters 401–521 · show in text ↑
Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

The combined BA-LWD73 and M. oleifera treatment gave the highest root length in tomato, 30.48 cm.

Treatment
combined treatment of BA-LWD73 + M. oleiferae2
Interactor
BA-LWD73e2biocontrol_agent
Outcome
root lengthe2
Direction
higheste2
Value
30.48 cme2

Not reportedComparator

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

Solanum lycopersicum
Solanum lycopersicum · TaxonKod B · CC BY-SA 4.0 · Wikimedia Commons ↗

Verbatim

t0

“Meloidogyne incognita in tomato”

✓ located verbatim in the source · title, characters 81–112 · show in text ↑
e2

“The combined treatment of BA-LWD73 + M. oleifera produced the highest plant height (96.94 cm) and root length (30.48 cm)”

✓ located verbatim in the source · abstract, characters 401–521 · show in text ↑
Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

BA-LWD73 alone gave the highest shoot biomass in tomato.

Treatment
BA-LWD73 alone treatmente3
Interactor
BA-LWD73e3biocontrol_agent
Outcome
shoot biomasse3
Direction
higheste3

Not reportedComparator

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

Solanum lycopersicum
Solanum lycopersicum · TaxonKod B · CC BY-SA 4.0 · Wikimedia Commons ↗

Verbatim

t0

“Meloidogyne incognita in tomato”

✓ located verbatim in the source · title, characters 81–112 · show in text ↑
e3

“The highest shoot biomass was observed in BA-LWD73 alone treatment”

✓ located verbatim in the source · abstract, characters 523–589 · show in text ↑
Intervention effectobservedoriginal resultnegativemeasured

Claim · model-written summary

Root biomass of tomato was generally lower in all treatments than in the control.

Treatment
all treatmentse4
Outcome
root biomasse4
Direction
lowere4
Comparator
the controle4

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

Solanum lycopersicum
Solanum lycopersicum · TaxonKod B · CC BY-SA 4.0 · Wikimedia Commons ↗

Verbatim

t0

“Meloidogyne incognita in tomato”

✓ located verbatim in the source · title, characters 81–112 · show in text ↑
e4

“root biomass was generally lower in all treatments than in the control”

✓ located verbatim in the source · abstract, characters 596–666 · show in text ↑
Intervention effectobservedoriginal resultpositivesignificant (as stated)measured

Claim · model-written summary

Treatments with M. oleifera and BA-LWD73 significantly reduced root gall rating and number of eggs per root system caused by M. incognita in tomato.

Treatment
treatments involving M. oleifera and BA-LWD73e5
Interactor
M. incognitaMeloidogyne incognitae5pest
Second interactor
BA-LWD73e5biocontrol_agent
Outcome
root gall rating, number of eggs per root systeme5
Direction
reducede5

Not reportedComparator

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

Solanum lycopersicum
Solanum lycopersicum · TaxonKod B · CC BY-SA 4.0 · Wikimedia Commons ↗
Meloidogyne incognita
Meloidogyne incognita · InteractorPhoto by William Wergin and Richard Sayre. Colorized by Stephen Ausmus. U.S. Department of Agriculture · CC BY 2.0 · Wikimedia Commons ↗

Verbatim

t0

“Meloidogyne incognita in tomato”

✓ located verbatim in the source · title, characters 81–112 · show in text ↑
e5

“M. incognita induced, root gall rating, number of eggs per root system, second stage juveniles (J2), and reproduction rate, were significantly reduced in treatments involving M. oleifera and BA-LWD73, either alone or in combination”

✓ located verbatim in the source · abstract, characters 668–899 · show in text ↑
Intervention effectobservedoriginal resultpositivesignificant (as stated)measured

Claim · model-written summary

Treatments with M. oleifera and BA-LWD73 significantly reduced J2 and reproduction rate of M. incognita in tomato.

Treatment
treatments involving M. oleifera and BA-LWD73e5
Interactor
M. incognitaMeloidogyne incognitae5pest
Second interactor
BA-LWD73e5biocontrol_agent
Outcome
second stage juveniles (J2), and reproduction ratee5
Direction
reducede5

Not reportedComparator

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

Solanum lycopersicum
Solanum lycopersicum · TaxonKod B · CC BY-SA 4.0 · Wikimedia Commons ↗
Meloidogyne incognita
Meloidogyne incognita · InteractorPhoto by William Wergin and Richard Sayre. Colorized by Stephen Ausmus. U.S. Department of Agriculture · CC BY 2.0 · Wikimedia Commons ↗

Verbatim

t0

“Meloidogyne incognita in tomato”

✓ located verbatim in the source · title, characters 81–112 · show in text ↑
e5

“M. incognita induced, root gall rating, number of eggs per root system, second stage juveniles (J2), and reproduction rate, were significantly reduced in treatments involving M. oleifera and BA-LWD73, either alone or in combination”

✓ located verbatim in the source · abstract, characters 668–899 · show in text ↑
Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

The B. australimaris LWD73 and M. oleifera treatment gave the lowest root gall rating, 2.67, in tomato.

Treatment
B. australimaris LWD73 + M. oleifera treatmente6
Interactor
B. australimaris LWD73Bacillus australimarise6biocontrol_agent
Outcome
root gall ratinge6
Direction
loweste6
Value
2.67e6

Not reportedComparator

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

Solanum lycopersicum
Solanum lycopersicum · TaxonKod B · CC BY-SA 4.0 · Wikimedia Commons ↗

Verbatim

t0

“Meloidogyne incognita in tomato”

✓ located verbatim in the source · title, characters 81–112 · show in text ↑
e6

“The lowest root gall rating (2.67) and J2 count (680) were observed in B. australimaris LWD73 + M. oleifera treatment”

✓ located verbatim in the source · abstract, characters 901–1018 · show in text ↑
Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

The B. australimaris LWD73 and M. oleifera treatment gave the lowest J2 count, 680, in tomato.

Treatment
B. australimaris LWD73 + M. oleifera treatmente6
Interactor
B. australimaris LWD73Bacillus australimarise6biocontrol_agent
Outcome
J2 counte6
Direction
loweste6
Value
680e6

Not reportedComparator

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

Solanum lycopersicum
Solanum lycopersicum · TaxonKod B · CC BY-SA 4.0 · Wikimedia Commons ↗

Verbatim

t0

“Meloidogyne incognita in tomato”

✓ located verbatim in the source · title, characters 81–112 · show in text ↑
e6

“The lowest root gall rating (2.67) and J2 count (680) were observed in B. australimaris LWD73 + M. oleifera treatment”

✓ located verbatim in the source · abstract, characters 901–1018 · show in text ↑
Observationobservedoriginal resultmeasured

Claim · model-written summary

FTIR of the M. oleifera extract indicated functional groups such as hydroxyl, C=C, S=O and C–O.

Taxon
M. oleiferaMoringa oleiferae7
Outcome
functional groups such as hydroxyl, C=C, S=O, and C–Oe7

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

Moringa oleifera
Moringa oleifera · TaxonVenkatx5 · CC BY-SA 3.0 · Wikimedia Commons ↗

Verbatim

t0

“Meloidogyne incognita in tomato”

✓ located verbatim in the source · title, characters 81–112 · show in text ↑
e7

“FTIR analysis of M. oleifera extract indicated the presence of functional groups such as hydroxyl, C=C, S=O, and C–O”

✓ located verbatim in the source · abstract, characters 1020–1136 · show in text ↑
Observationobservedoriginal resultmeasured

Claim · model-written summary

GC-MS of the M. oleifera extract revealed six phytocompounds.

Taxon
M. oleiferaMoringa oleiferae7
Outcome
phytocompoundse1
Value
sixe1

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

Moringa oleifera
Moringa oleifera · TaxonVenkatx5 · CC BY-SA 3.0 · Wikimedia Commons ↗

Verbatim

t0

“Meloidogyne incognita in tomato”

✓ located verbatim in the source · title, characters 81–112 · show in text ↑
e7

“FTIR analysis of M. oleifera extract indicated the presence of functional groups such as hydroxyl, C=C, S=O, and C–O”

✓ located verbatim in the source · abstract, characters 1020–1136 · show in text ↑
e1

“GC-MS analysis revealed six phytocompounds, with 5-Hydroxymethylfurfural (71.76%) as the dominant component”

✓ located verbatim in the source · abstract, characters 1170–1277 · show in text ↑
Observationobservedoriginal resultmeasured

Claim · model-written summary

5-Hydroxymethylfurfural was the dominant component of the M. oleifera extract, at 71.76%.

Taxon
M. oleiferaMoringa oleiferae7
Outcome
5-Hydroxymethylfurfurale1
Value
71.76%e1
Qualifier
dominant componente1

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

Moringa oleifera
Moringa oleifera · TaxonVenkatx5 · CC BY-SA 3.0 · Wikimedia Commons ↗

Verbatim

t0

“Meloidogyne incognita in tomato”

✓ located verbatim in the source · title, characters 81–112 · show in text ↑
e7

“FTIR analysis of M. oleifera extract indicated the presence of functional groups such as hydroxyl, C=C, S=O, and C–O”

✓ located verbatim in the source · abstract, characters 1020–1136 · show in text ↑
e1

“GC-MS analysis revealed six phytocompounds, with 5-Hydroxymethylfurfural (71.76%) as the dominant component”

✓ located verbatim in the source · abstract, characters 1170–1277 · show in text ↑
Observationobservedoriginal resultmeasured

Claim · model-written summary

Volatile organic compounds from BA-LWD73 included 1H-Indole at 87.46%.

Interactor
BA-LWD73e1biocontrol_agent
Outcome
1H-Indolee1
Value
87.46%e1
Qualifier
volatile organic compoundse1

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

Solanum lycopersicum
Solanum lycopersicum · TaxonKod B · CC BY-SA 4.0 · Wikimedia Commons ↗

Verbatim

t0

“Meloidogyne incognita in tomato”

✓ located verbatim in the source · title, characters 81–112 · show in text ↑
e1

“volatile organic compounds from BA-LWD73 included 1H-Indole (87.46%) and 2-Nonanone (6.54%)”

✓ located verbatim in the source · abstract, characters 1345–1436 · show in text ↑
Observationobservedoriginal resultmeasured

Claim · model-written summary

Volatile organic compounds from BA-LWD73 included 2-Nonanone at 6.54%.

Interactor
BA-LWD73e1biocontrol_agent
Outcome
2-Nonanonee1
Value
6.54%e1
Qualifier
volatile organic compoundse1

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

Solanum lycopersicum
Solanum lycopersicum · TaxonKod B · CC BY-SA 4.0 · Wikimedia Commons ↗

Verbatim

t0

“Meloidogyne incognita in tomato”

✓ located verbatim in the source · title, characters 81–112 · show in text ↑
e1

“volatile organic compounds from BA-LWD73 included 1H-Indole (87.46%) and 2-Nonanone (6.54%)”

✓ located verbatim in the source · abstract, characters 1345–1436 · show in text ↑

N-benzyladenine · growth · Solanum lycopersicum (tomato)Results differ

42 papers: 35 positive, 7 negative or no effect

34 papers in the same direction as this paper · 7 in the opposite direction

  1. negative
  2. negative
  3. no effect

38 papers more in this group

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N-benzyladenine · Meloidogyne incognita · Solanum lycopersicum (tomato)Positive and negative results

2 papers: 1 positive, 1 negative or no effect

1 in the opposite direction

  1. negative
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Moringa oleifera · Meloidogyne incognita · Solanum lycopersicum (tomato)Results agree

2 papers: 2 positive, 0 negative or no effect

1 paper in the same direction as this paper

  1. positive
See all 2 papers →

Moringa oleifera · growth · Solanum lycopersicum (tomato)Results agree

4 papers: 4 positive, 0 negative or no effect

3 papers in the same direction as this paper

  1. positive
  2. positive
  3. positive
See all 4 papers →

botanical · growth · Solanum lycopersicum (tomato)Positive and negative results

291 papers: 203 positive, 88 negative or no effect

202 papers in the same direction as this paper · 87 in the opposite direction · 1 reporting no difference from an alternative

  1. no effect
  2. negative
  3. negative

287 papers more in this group

See all 291 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.