Abstract
Root-knot nematode (Meloidogyne sp.) is a major concern due to difficulty of control. Secondary metabolites naturally occurring in plants offer a method for combating invasion by root-knot nematode . The study was conducted to investigate nematocidal effects of plant parts of fermented Lantana camara L. collected around the Visage, George and Mooketsi areas, Limpopo Province, South Africa. Effective dosages of plant extracts, which could be applied through a drip irrigation system, on tomato (Solanum lycopersicum L) were determined against nematode infection. Extracts of L. camara were evaluated at aqueous concentrations of 0.92%, 2.76%, or 3.68% (v/v) for effects on plant parameters. Mortality rate of Meloidogyne javanica J2 treated with fermented Lantana camara at varying extract concentration, location and tissue was significant. Nematocidal activity of the extracts were mainly due to plant part and concentration. There was a significant location × tissue interaction for wet plant biomass, Meloidogyne javanica galling index, root egg mass, and soil egg mass. The reduction in final nematode population, root-knot index and soil egg hatching after 8 weeks following transplanting in pot trials is indicative of nematocidal activity of L. camara. There was no difference in location × tissue interaction for plant height, stem diameter, and number of fruit. Treatment with fermented L. camara was not phytotoxic. Fermented L. camara plant extracts may be used for management of root-knot nematode in tomato, but this must be validated in field trials.
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Claims 8
Claim · model-written summary
Mortality of Meloidogyne javanica J2 treated with fermented Lantana camara was significant across extract concentration, location and tissue.
- Taxon
- tomato
Solanum lycopersicume2 - Treatment
- fermented Lantana camarae1
- Interactor
- Meloidogyne javanicaMeloidogyne javanicae1pathogen
- Outcome
- Mortality rate of Meloidogyne javanica J2e1
- Qualifier
- at varying extract concentration, location and tissuee1
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Mortality rate of Meloidogyne javanica J2 treated with fermented Lantana camara at varying extract concentration, location and tissue was significant”
e2“tomato (Solanum lycopersicum L)”
Claim · model-written summary
Nematocidal activity of the Lantana camara extracts was mainly due to plant part and concentration.
- Taxon
- tomatoSolanum lycopersicume2
- Treatment
- plant part and concentratione3
- Outcome
- Nematocidal activitye3
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e2“tomato (Solanum lycopersicum L)”
e3“Nematocidal activity of the extracts were mainly due to plant part and concentration”
Claim · model-written summary
Location × tissue interaction was significant for wet plant biomass, Meloidogyne javanica galling index and root egg mass.
- Taxon
- tomatoSolanum lycopersicume2
- Interactor
- Meloidogyne javanicaMeloidogyne javanicae4pathogen
- Outcome
- wet plant biomass, Meloidogyne javanica galling index, root egg masse4
- Qualifier
- location × tissue interactione4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e2“tomato (Solanum lycopersicum L)”
e4“There was a significant location × tissue interaction for wet plant biomass, Meloidogyne javanica galling index, root egg mass”
Claim · model-written summary
Location × tissue interaction was significant for soil egg mass.
- Taxon
- tomatoSolanum lycopersicume2
- Interactor
- Meloidogyne javanicaMeloidogyne javanicae4pathogen
- Outcome
- soil egg masse5
- Qualifier
- location × tissue interactione4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e2“tomato (Solanum lycopersicum L)”
e4“There was a significant location × tissue interaction for wet plant biomass, Meloidogyne javanica galling index, root egg mass”
e5“root egg mass, and soil egg mass”
Claim · model-written summary
Fermented Lantana camara reduced final nematode population, root-knot index and soil egg hatching after 8 weeks in pot trials.
- Taxon
- tomatoSolanum lycopersicume2
- Treatment
- L. camarae6
- Outcome
- final nematode population, root-knot index and soil egg hatchinge6
- Direction
- reductione6
- Qualifier
- after 8 weeks following transplantinge6
- Setting
- pot trialse6
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e2“tomato (Solanum lycopersicum L)”
e6“The reduction in final nematode population, root-knot index and soil egg hatching after 8 weeks following transplanting in pot trials is indicative of nematocidal activity of L. camara”
Claim · model-written summary
Location × tissue interaction was not significant for plant height, stem diameter and number of fruit.
- Taxon
- tomatoSolanum lycopersicume2
- Outcome
- plant height, stem diameter, and number of fruite7
- Qualifier
- location × tissue interactione7
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e2“tomato (Solanum lycopersicum L)”
e7“There was no difference in location × tissue interaction for plant height, stem diameter, and number of fruit”
Claim · model-written summary
Treatment with fermented Lantana camara was not phytotoxic to tomato.
- Taxon
- tomatoSolanum lycopersicume2
- Treatment
- fermented L. camarae0
- Outcome
- phytotoxice0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e2“tomato (Solanum lycopersicum L)”
e0“Treatment with fermented L. camara was not phytotoxic”
Claim · model-written summary
Fermented Lantana camara extracts may be used for management of root-knot nematode in tomato, but field validation is required.
- Taxon
- tomatoSolanum lycopersicume0
- Outcome
- management of root-knot nematodee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Fermented L. camara plant extracts may be used for management of root-knot nematode in tomato, but this must be validated in field trials”
The same questions in other papers
Lantana camara · Meloidogyne javanica · Solanum lycopersicum (tomato)Results agree
1 paper in the same direction as this paper
- positive
processing · Meloidogyne javanica · Solanum lycopersicum (tomato)Positive and negative results
2 in the opposite direction
- negative
- negative
processing · crop injury · Solanum lycopersicum (tomato)Results agree
3 papers in the same direction as this paper
- positive
- positive
- positive
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.