Abstract
Root pathogens are important constraints to banana and plantain production worldwide. A survey was conducted in Cameroon between 1994 and 1995 to identify the major root pathogens of banana and plantains in large scale commercial plantations and in peasant plantations. Investigations were also carried out to determine the effects of the pathogens on plant growth characteristics. Several nematode species were isolated from banana and plantain roots. Radopholus similis, Helicotylenchus multicinctus, Pratylenchus goodeyi and Meloidogyne spp were the most important nematode species found. The burrowing nematode R, similis was the dominant species at lower elevation (below 500m asl). At higher elevation (above 1000m asl) the lesion nematode P. goodeyi was the most important.Cylindrocladium sp was the only pathogenic fungus isolated from banana root samples collected from commercial banana plantations. Root damage level in most of the plantations varied between moderate and severe. In pot studies, the nematode R, similis and the fungus Cylindrocladium significantly reduced plant growth parameters of tissue culture plantlets. Plants inoculated with either the nematode or the fungus showed less damage than those inoculated simultaneously with the nematode and the fungus. These findings indicate that root parasitism in commercial banana plantations in Cameroon is caused by a nematode-fungus complex.
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Claims 10
Claim · model-written summary
Several nematode species were isolated from banana and plantain roots.
Verbatim
e0“Several nematode species were isolated from banana and plantain roots.”
Claim · model-written summary
Four nematode taxa were the most important in roots.
- Taxon
- bananas and plantainst0
- Interactor
- Radopholus similis
Radopholus similise0pathogen - Outcome
- most important nematode species founde0
- Qualifier
- Helicotylenchus multicinctus, Pratylenchus goodeyi and Meloidogyne sppe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Radopholus similis, Helicotylenchus multicinctus, Pratylenchus goodeyi and Meloidogyne spp were the most important nematode species found.”
t0“bananas and plantains”
Claim · model-written summary
R. similis dominated below 500 m elevation.
Verbatim
e0“The burrowing nematode R, similis was the dominant species at lower elevation (below 500m asl).”
t0“bananas and plantains”
Claim · model-written summary
P. goodeyi was most important above 1000 m elevation.
- Taxon
- bananas and plantainst0
- Interactor
- P. goodeyiPratylenchus goodeyie0pathogen
- Outcome
- most importante0
- Setting
- higher elevation (above 1000m asl)e0
Verbatim
e0“At higher elevation (above 1000m asl) the lesion nematode P. goodeyi was the most important.”
t0“bananas and plantains”
Claim · model-written summary
Cylindrocladium was the sole pathogenic fungus isolated from commercial banana root samples.
- Taxon
- bananae0
- Interactor
- Cylindrocladium sp
Calonectriae0pathogen - Outcome
- only pathogenic fungus isolatede0
- Setting
- commercial banana plantationse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Cylindrocladium sp was the only pathogenic fungus isolated from banana root samples collected from commercial banana plantations.”
Claim · model-written summary
Root damage in most plantations ranged from moderate to severe.
Verbatim
e0“Root damage level in most of the plantations varied between moderate and severe.”
t0“bananas and plantains”
Claim · model-written summary
R. similis significantly reduced plantlet growth in pots.
- Taxon
- bananas and plantainst0
- Treatment
- the nematode R, similise0
- Interactor
- R, similise0pathogen
- Outcome
- plant growth parameters of tissue culture plantletse0
- Direction
- reducede0
- Setting
- pot studiese0
Not reportedComparator
Verbatim
e0“In pot studies, the nematode R, similis and the fungus Cylindrocladium significantly reduced plant growth parameters of tissue culture plantlets.”
t0“bananas and plantains”
Claim · model-written summary
Cylindrocladium significantly reduced plantlet growth in pots.
- Taxon
- bananas and plantainst0
- Treatment
- the fungus Cylindrocladiume0
- Interactor
- CylindrocladiumCalonectriae0pathogen
- Outcome
- plant growth parameters of tissue culture plantletse0
- Direction
- reducede0
- Setting
- pot studiese0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In pot studies, the nematode R, similis and the fungus Cylindrocladium significantly reduced plant growth parameters of tissue culture plantlets.”
t0“bananas and plantains”
Claim · model-written summary
Combined nematode and fungal inoculation caused more damage than either alone.
Verbatim
e0“Plants inoculated with either the nematode or the fungus showed less damage than those inoculated simultaneously with the nematode and the fungus.”
t0“bananas and plantains”
Claim · model-written summary
The authors attribute commercial banana root parasitism in Cameroon to a nematode–fungus complex.
Verbatim
e0“These findings indicate that root parasitism in commercial banana plantations in Cameroon is caused by a nematode-fungus complex.”
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1 paper in the same direction as this paper
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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.