Abstract
BACKGROUND: Root-knot nematodes (RKNs), Meloidogyne spp., are one of the most destructive polyphagous plant-parasitic nematodes. They pose a serious threat to global food security and are difficult to control. Entomopathogenic nematodes (EPNs) show promise in controlling RKNs. However, it remains unclear whether the volatile organic compounds (VOCs) emitted from EPN-infected cadavers can control RKNs. RESULTS: We investigated the fumigation activity of VOCs released from cadavers infected by five different species of EPNs on RKNs in Petri dishes, and found that VOCs released from Steinernema feltiae (SN strain) and S. carpocapsae (All strain) infected cadavers had a significant lethal effect on second-stage juveniles (J2s) of Meloidogyne incognita. The VOCs released from the cadavers infected with S. feltiae were analyzed using SPME-GC/MS. Dimethyl disulfide (DMDS), tetradecane, pentadecane, and butylated hydroxytoluene (BHT), were selected for a validation experiment with pure compounds. The DMDS compound had significant nematicidal activity and repelled J2s. DMDS also inhibited egg hatching and the invasion of tomato roots by J2s. In a pot experiment, the addition of S. feltiae-infected cadavers and cadavers wrapped with a 400-mesh nylon net also significantly reduced the population of RKNs in tomato roots after 7 days. The number of root knots and eggs was reduced by 58% and 74.34%, respectively, compared to the control. CONCLUSION: These results suggested that the VOCs emitted by the EPN-infected cadavers affected various developmental stages of M. incognita and thus have the potential to be used in controlling RKNs through multiple methods. © 2024 Society of Chemical Industry.
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Claims 8
Claim · model-written summary
VOCs from Steinernema feltiae-infected cadavers killed M. incognita juveniles.
- Taxon
- tomato
Solanum lycopersicume1 - Treatment
- Steinernema feltiaee0
- Interactor
- Meloidogyne incognita
_penetrates_a_tomato_root_-_USDA-ARS.jpg?width=60)
Meloidogyne incognitae0pest - Second interactor
- Steinernema feltiae
Steinernema feltiaee0biocontrol_agent - Outcome
- lethal effect on second-stage juveniles (J2s) of Meloidogyne incognitae0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
_penetrates_a_tomato_root_-_USDA-ARS.jpg?width=500)
Verbatim
e0“VOCs released from Steinernema feltiae (SN strain) and S. carpocapsae (All strain) infected cadavers had a significant lethal effect on second-stage juveniles (J2s) of Meloidogyne incognita.”
e1“the invasion of tomato roots by J2s.”
Claim · model-written summary
VOCs from S. carpocapsae-infected cadavers killed M. incognita juveniles.
- Taxon
- tomatoSolanum lycopersicume1
- Treatment
- S. carpocapsaee0
- Interactor
- Meloidogyne incognitaMeloidogyne incognitae0pest
- Second interactor
- S. carpocapsae
Steinernema carpocapsaee0biocontrol_agent
- Outcome
- lethal effect on second-stage juveniles (J2s) of Meloidogyne incognitae0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“VOCs released from Steinernema feltiae (SN strain) and S. carpocapsae (All strain) infected cadavers had a significant lethal effect on second-stage juveniles (J2s) of Meloidogyne incognita.”
e1“the invasion of tomato roots by J2s.”
Claim · model-written summary
DMDS had nematicidal activity and repelled juveniles.
- Taxon
- tomatoSolanum lycopersicume1
- Treatment
- DMDSe0
- Outcome
- nematicidal activity and repelled J2se0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The DMDS compound had significant nematicidal activity and repelled J2s.”
e1“the invasion of tomato roots by J2s.”
Claim · model-written summary
DMDS inhibited egg hatching and tomato root invasion.
- Taxon
- tomatoSolanum lycopersicume0
- Treatment
- DMDSe0
- Outcome
- egg hatching and the invasion of tomato roots by J2se0
- Direction
- inhibitede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“DMDS also inhibited egg hatching and the invasion of tomato roots by J2s.”
Claim · model-written summary
S. feltiae-infected cadavers reduced root-knot nematode populations in tomato roots.
- Taxon
- tomatoSolanum lycopersicume0
- Treatment
- S. feltiae-infected cadaverse0
- Interactor
- RKNse0pest
- Outcome
- population of RKNs in tomato rootse0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the addition of S. feltiae-infected cadavers and cadavers wrapped with a 400-mesh nylon net also significantly reduced the population of RKNs in tomato roots after 7 days.”
Claim · model-written summary
cadavers wrapped with a 400-mesh nylon net reduced root-knot nematode populations in tomato roots.
- Taxon
- tomatoSolanum lycopersicume0
- Treatment
- cadavers wrapped with a 400-mesh nylon nete0
- Interactor
- RKNse0pest
- Outcome
- population of RKNs in tomato rootse0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the addition of S. feltiae-infected cadavers and cadavers wrapped with a 400-mesh nylon net also significantly reduced the population of RKNs in tomato roots after 7 days.”
Claim · model-written summary
root knots fell by 58% versus control.
- Taxon
- tomatoSolanum lycopersicume1
- Outcome
- root knotse0
- Direction
- reducede0
- Value
- 58%e0
- Comparator
- the controle0
Not reportedTreatment
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The number of root knots and eggs was reduced by 58% and 74.34%, respectively, compared to the control.”
e1“the invasion of tomato roots by J2s.”
Claim · model-written summary
eggs fell by 74.34% versus control.
- Taxon
- tomatoSolanum lycopersicume1
- Outcome
- eggse0
- Direction
- reducede0
- Value
- 74.34%e0
- Comparator
- the controle0
Not reportedTreatment
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The number of root knots and eggs was reduced by 58% and 74.34%, respectively, compared to the control.”
e1“the invasion of tomato roots by J2s.”
The same questions in other papers
Steinernema carpocapsae · Meloidogyne incognita · Solanum lycopersicum (tomato)Results agree
1 paper in the same direction as this paper
- positive
dimethyl disulfide · pest · Solanum lycopersicum (tomato)Results agree
1 paper in the same direction as this paper
- positive
Steinernema feltiae · Meloidogyne incognita · Solanum lycopersicum (tomato)Results agree
2 papers in the same direction as this paper
- positive
- positive
trap barrier · pest · Solanum lycopersicum (tomato)Positive and negative results
20 papers in the same direction as this paper · 2 in the opposite direction
- negative
- negative
- positive
19 papers more in this group
See all 23 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.