Abstract
The root galling index and the densities of eggs in roots and juveniles in soil of the root-knot nematode Meloidogyne javanica (Treub) Chitwood on tomato, and the effect of these on crop yield were assessed in greenhouse experiments applying various treatments at two different sites in Crete, Greece. Tomato crops were grown for four cycles by rotating nematode-resistant (first and third spring crops) with susceptible (second and fourth autumn crops) cultivars and receiving the following treatments: (a) untreated control; (b) methyl bromide application before the first and third crops; (c) application of the fungus Pochonia chlamydosporia (Goddard) Zare, Gams & Evans before planting the first, third and fourth crops with a supplementary application three weeks after the beginning of the fourth crop; (d) application of oxamyl in both sites and fenamiphos in site 1 only at the second and fourth crops; (e) combination of treatments (c) and (d). The fungus density in soil was monitored three weeks after application and at the end of each crop, when roots were lifted. Pochonia chlamydosporia had a variable establishment and did not control the nematode. Its pathogenicity on eggs was not demonstrated, as in all cases galls were big, with all egg masses inside and protected from infection. The methyl bromide treatment significantly reduced root galling and egg production compared to other treatments in all crop cycles and the yield of the fourth crop was significantly greater. Nematicides reduced nematode densities compared with untreated controls and the fungus treatment, but they were less effective than methyl bromide and resulted in increased yield in one site only.
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Claims 8
Claim · model-written summary
Pochonia chlamydosporia had a variable establishment in the soil.
- Taxon
- tomato
Solanum lycopersicumt1 - Interactor
- Pochonia chlamydosporiaPochonia chlamydosporiae1biocontrol_agent
- Outcome
- variable establishmente1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Pochonia chlamydosporia had a variable establishment and did not control the nematode”
t1“tomato”
Claim · model-written summary
Pochonia chlamydosporia did not control the root-knot nematode.
- Taxon
- tomatoSolanum lycopersicumt1
- Treatment
- Pochonia chlamydosporiae1
- Interactor
- Meloidogyne javanicaMeloidogyne javanicat0pest
- Second interactor
- Pochonia chlamydosporiaPochonia chlamydosporiae1biocontrol_agent
- Outcome
- control the nematodee1
- Direction
- did not controle1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Pochonia chlamydosporia had a variable establishment and did not control the nematode”
t0“Meloidogyne javanica”
t1“tomato”
Claim · model-written summary
The pathogenicity of Pochonia chlamydosporia on nematode eggs was not demonstrated, as galls were big with all egg masses inside and protected from infection.
- Taxon
- tomatoSolanum lycopersicumt1
- Interactor
- Pochonia chlamydosporiaPochonia chlamydosporiae1biocontrol_agent
- Outcome
- pathogenicity on eggse1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Pochonia chlamydosporia had a variable establishment and did not control the nematode. Its pathogenicity on eggs was not demonstrated”
t1“tomato”
Claim · model-written summary
Methyl bromide significantly reduced root galling and egg production compared to the other treatments in all crop cycles.
- Taxon
- tomatoSolanum lycopersicumt1
- Treatment
- methyl bromide treatmente1
- Interactor
- Meloidogyne javanicaMeloidogyne javanicat0pest
- Outcome
- root galling and egg productione1
- Direction
- reducede1
- Comparator
- other treatmentse1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“The methyl bromide treatment significantly reduced root galling and egg production compared to other treatments in all crop cycles and the yield of the fourth crop was significantly greater”
t0“Meloidogyne javanica”
t1“tomato”
Claim · model-written summary
The yield of the fourth tomato crop was significantly greater with methyl bromide.
- Taxon
- tomatoSolanum lycopersicumt1
- Treatment
- methyl bromide treatmente1
- Outcome
- the yield of the fourth crope1
- Direction
- greatere1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“The methyl bromide treatment significantly reduced root galling and egg production compared to other treatments in all crop cycles and the yield of the fourth crop was significantly greater”
t1“tomato”
Claim · model-written summary
Nematicides reduced nematode densities compared with untreated controls and the fungus treatment.
- Taxon
- tomatoSolanum lycopersicumt1
- Treatment
- Nematicidese1
- Interactor
- Meloidogyne javanicaMeloidogyne javanicat0pest
- Outcome
- nematode densitiese1
- Direction
- reducede1
- Comparator
- untreated controls and the fungus treatmente1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Nematicides reduced nematode densities compared with untreated controls and the fungus treatment”
t0“Meloidogyne javanica”
t1“tomato”
Claim · model-written summary
Nematicides were less effective than methyl bromide.
- Taxon
- tomatoSolanum lycopersicumt1
- Treatment
- Nematicidese1
- Outcome
- less effectivee1
- Direction
- less effectivee1
- Comparator
- methyl bromidee1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Nematicides reduced nematode densities compared with untreated controls and the fungus treatment, but they were less effective than methyl bromide and resulted in increased yield in one site only”
t1“tomato”
Claim · model-written summary
Nematicides resulted in increased tomato yield in one site only.
- Taxon
- tomatoSolanum lycopersicumt1
- Treatment
- Nematicidese1
- Outcome
- yielde1
- Direction
- increasede1
- Qualifier
- in one site onlye1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Nematicides reduced nematode densities compared with untreated controls and the fungus treatment, but they were less effective than methyl bromide and resulted in increased yield in one site only”
t1“tomato”
The same questions in other papers
Pochonia chlamydosporia · Meloidogyne javanica · Solanum lycopersicum (tomato)Positive and negative results
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- no effect
- positive
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- positive
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See all 11 papers →bromomethane · Meloidogyne javanica · Solanum lycopersicum (tomato)Results agree
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- positive
- positive
insecticide · Meloidogyne javanica · Solanum lycopersicum (tomato)Results agree
6 papers in the same direction as this paper
- positive
- positive
- positive
3 papers more in this group
See all 7 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.