Abstract
Nematicidal activity of the leaf powder, leaf extracts and formulated leaf extracts of Myrtus communis , an evergreen shrub that is widely distributed in Israel and other Mediterranean countries, was evaluated using the root‐knot nematode Meloidogyne javanica in in vitro and pot experiments. Leaf powder added to sand at 0·1% (w/w) reduced the number of juveniles recovered from the sand by more than 50%. Reduction in galling index and number of nematode eggs on tomato roots was also observed by incorporating the leaf powder at 0·1–0·4% (w/w) in the soil in pot experiments. Leaf powder extracts with methanol or ethanol showed the highest nematicidal activity among all extracts tested. Emulsifiable concentrates of leaf‐paste extract at a concentration as low as 0·005% (a.i., w/w) reduced the number of juveniles recovered from treated sand and the gall index of cucumber seedlings. The extract paste at 26 g m −2 was also effective in reducing the gall index of tomato plants in field‐plot experiments. The leaf powder at 0·2% and the formulated leaf‐paste extract at 0·02% were also nematicidal to Tylenchulus semipenetrans and Ditylenchus dipsaci , but not to Pratylenchus penetrans or Steinernema feltiae . At least three nematicidal compounds were found in the leaf extract upon fractionation by thin‐layer chromatography. The results suggest that the leaf powder and paste extract of M. communis are potential nematicides against root‐knot nematodes.
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Claims 11
Claim · model-written summary
Leaf powder at 0·1% (w/w) added to sand reduced the number of M. javanica juveniles recovered from the sand by more than 50%.
- Taxon
- Myrtus communis
_in_Athens_on_July_4%2C_2023.jpg?width=60)
Myrtus communise0 - Treatment
- Leaf powder added to sand at 0·1% (w/w)e1
- Interactor
- Meloidogyne javanicaMeloidogyne javanicat1pest
- Outcome
- number of juveniles recovered from the sande1
- Direction
- reducede1
- Value
- more than 50%e1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
_in_Athens_on_July_4%2C_2023.jpg?width=500)
Verbatim
e0“Nematicidal activity of the leaf powder, leaf extracts and formulated leaf extracts of Myrtus communis”
e1“Leaf powder added to sand at 0·1% (w/w) reduced the number of juveniles recovered from the sand by more than 50%”
t1“Meloidogyne javanica”
Claim · model-written summary
Leaf powder at 0·1–0·4% (w/w) in soil reduced galling index and nematode egg numbers on tomato roots in pot experiments.
- Taxon
- tomato
Solanum lycopersicume2 - Treatment
- leaf powder at 0·1–0·4% (w/w)e2
- Interactor
- Meloidogyne javanicaMeloidogyne javanicat1pest
- Outcome
- galling index and number of nematode eggse2
- Direction
- Reductione2
- Setting
- pot experimentse2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e2“Reduction in galling index and number of nematode eggs on tomato roots was also observed by incorporating the leaf powder at 0·1–0·4% (w/w) in the soil in pot experiments”
t1“Meloidogyne javanica”
Claim · model-written summary
The extract paste at 26 g m −2 reduced the gall index of tomato plants in field-plot experiments.
- Taxon
- tomatoSolanum lycopersicume7
- Treatment
- The extract paste at 26 g m −2e7
- Interactor
- Meloidogyne javanicaMeloidogyne javanicat1pest
- Outcome
- gall index of tomato plantse7
- Direction
- reducinge7
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e7“The extract paste at 26 g m −2 was also effective in reducing the gall index of tomato plants in field‐plot experiments”
t1“Meloidogyne javanica”
Claim · model-written summary
Emulsifiable concentrates of leaf extract at 0·005% (a.i., w/w) reduced juvenile numbers in treated sand and the gall index of cucumber seedlings.
- Taxon
- cucumber
Cucumis sativuse4 - Treatment
- Emulsifiable concentratese4
- Interactor
- Meloidogyne javanicaMeloidogyne javanicat1pest
- Outcome
- number of juveniles recovered from treated sand and the gall indexe4
- Direction
- reducede4
- Value
- 0·005% (a.i., w/w)e4
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e4“Emulsifiable concentrates of leaf‐paste extract at a concentration as low as 0·005% (a.i., w/w) reduced the number of juveniles recovered from treated sand and the gall index of cucumber seedlings”
t1“Meloidogyne javanica”
Claim · model-written summary
Leaf powder at 0·2% was nematicidal to Tylenchulus semipenetrans and Ditylenchus dipsaci.
- Taxon
- Myrtus communisMyrtus communise0
- Treatment
- The leaf powder at 0·2%e5
- Interactor
- Tylenchulus semipenetransTylenchulus semipenetranse5pest
- Second interactor
- Ditylenchus dipsaci
.jpg?width=60)
Ditylenchus dipsacie5pest - Outcome
- nematicidale5
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
.jpg?width=500)
Verbatim
e0“Nematicidal activity of the leaf powder, leaf extracts and formulated leaf extracts of Myrtus communis”
e5“The leaf powder at 0·2% and the formulated leaf‐paste extract at 0·02% were also nematicidal to Tylenchulus semipenetrans and Ditylenchus dipsaci”
Claim · model-written summary
Formulated leaf-paste extract at 0·02% was nematicidal to Tylenchulus semipenetrans and Ditylenchus dipsaci.
- Taxon
- Myrtus communisMyrtus communise0
- Treatment
- formulated leaf‐paste extract at 0·02%e5
- Interactor
- Tylenchulus semipenetransTylenchulus semipenetranse5pest
- Second interactor
- Ditylenchus dipsaciDitylenchus dipsacie5pest
- Outcome
- nematicidale5
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Nematicidal activity of the leaf powder, leaf extracts and formulated leaf extracts of Myrtus communis”
e5“The leaf powder at 0·2% and the formulated leaf‐paste extract at 0·02% were also nematicidal to Tylenchulus semipenetrans and Ditylenchus dipsaci”
Claim · model-written summary
Leaf powder at 0·2% was not nematicidal to Pratylenchus penetrans or Steinernema feltiae.
- Taxon
- Myrtus communisMyrtus communise0
- Treatment
- leaf powder at 0·2%e5
- Interactor
- Pratylenchus penetrans
Pratylenchus penetranse6pest - Second interactor
- Steinernema feltiae
Steinernema feltiaee6other - Outcome
- nematicidale5
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Nematicidal activity of the leaf powder, leaf extracts and formulated leaf extracts of Myrtus communis”
e5“The leaf powder at 0·2% and the formulated leaf‐paste extract at 0·02% were also nematicidal to Tylenchulus semipenetrans and Ditylenchus dipsaci”
e6“but not to Pratylenchus penetrans or Steinernema feltiae”
Claim · model-written summary
Formulated leaf-paste extract at 0·02% was not nematicidal to Pratylenchus penetrans or Steinernema feltiae.
- Taxon
- Myrtus communisMyrtus communise0
- Treatment
- formulated leaf‐paste extract at 0·02%e5
- Interactor
- Pratylenchus penetransPratylenchus penetranse6pest
- Second interactor
- Steinernema feltiaeSteinernema feltiaee6other
- Outcome
- nematicidale5
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Nematicidal activity of the leaf powder, leaf extracts and formulated leaf extracts of Myrtus communis”
e5“The leaf powder at 0·2% and the formulated leaf‐paste extract at 0·02% were also nematicidal to Tylenchulus semipenetrans and Ditylenchus dipsaci”
e6“but not to Pratylenchus penetrans or Steinernema feltiae”
Claim · model-written summary
At least three nematicidal compounds were found in the leaf extract by thin-layer chromatography fractionation.
- Taxon
- Myrtus communisMyrtus communise0
- Outcome
- nematicidal compoundse7
- Value
- At least threee7
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Nematicidal activity of the leaf powder, leaf extracts and formulated leaf extracts of Myrtus communis”
e7“At least three nematicidal compounds were found in the leaf extract upon fractionation”
Claim · model-written summary
The leaf powder and paste extract of M. communis are suggested to be potential nematicides.
- Taxon
- M. communisMyrtus communise7
- Outcome
- potential nematicidese7
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e7“The results suggest that the leaf powder and paste extract of M. communis are potential nematicides”
Claim · model-written summary
Leaf powder extracts with methanol or ethanol showed the highest nematicidal activity among all extracts tested.
- Taxon
- Myrtus communisMyrtus communise0
- Treatment
- Leaf powder extracts with methanol or ethanole3
- Outcome
- nematicidal activitye3
- Direction
- higheste3
- Comparator
- all extracts testede3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Nematicidal activity of the leaf powder, leaf extracts and formulated leaf extracts of Myrtus communis”
e3“Leaf powder extracts with methanol or ethanol showed the highest nematicidal activity among all extracts tested”
The same questions in other papers
botanical · Meloidogyne javanica · Solanum lycopersicum (tomato)Positive and negative results
34 papers in the same direction as this paper · 1 in the opposite direction
- positive
- positive
- negative
32 papers more in this group
See all 36 papers →botanical · pest · Myrtus communisResults agree
1 paper in the same direction as this paper
- positive
botanical · Meloidogyne javanica · Myrtus communisResults agree
1 paper in the same direction as this paper
- 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.