Abstract
Sugarcane is the main industrial crop in Kitadaito Island (Okinawa), Japan, and the objective of this study was to estimate potential damage to sugarcane by plant-parasitic nematodes (PPN). We selected 15 sugarcane fields with the same cultivar and cropping type in Kitadaito Island. Various kinds of PPN were found in all the fields and the proportion of PPN to the total nematode number was ca 50%, which is relatively high compared to other Japanese upland fields. Lesion ( Pratylenchus sp.), stunt ( Tylenchorhynchus sp.) and spiral ( Helicotylenchus sp.) nematodes were detected at mean densities of 48, 22 and 6 (20 g soil) −1 , respectively, from all the fields, and lance ( Hoplolaimus sp.) and ring nematodes from half of the fields. The results suggested that sugarcane fields in Kitadaito Island were ubiquitously infested with a variety of PPN with a relatively high abundance. One of the fields was studied further to examine the potential relationship between PPN and sugarcane plant growth. Since no nematicide is registered for sugarcane fields in Japan, an appropriate agrochemical was selected by testing its efficacy against PPN before evaluating the relationship between a PPN community and sugarcane growth. The results of a 10-week pot experiment for sugarcane growth showed that the number of PPN decreased by applying a nematicide fosthiazate, and that sugarcane seedling biomass was significantly greater by 34-63% in soils with applied nematicide than in non-applied control soils, suggesting that PPN may suppress sugarcane growth in Kitadaito Island.
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Claims 8
Claim · model-written summary
Plant-parasitic nematodes occurred in all sampled sugarcane fields and made up about half of nematodes.
Verbatim
e0“Various kinds of PPN were found in all the fields and the proportion of PPN to the total nematode number was ca 50%”
t0“sugarcane fields in Kitadaito Island”
Claim · model-written summary
Lesion nematodes averaged 48 per 20 g soil.
- Taxon
- sugarcanet0
- Interactor
- Pratylenchus sp.
Pratylenchuse0pest - Outcome
- Lesion ( Pratylenchus sp.)e0
- Value
- 48e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Lesion ( Pratylenchus sp.), stunt ( Tylenchorhynchus sp.) and spiral ( Helicotylenchus sp.) nematodes were detected at mean densities of 48, 22 and 6 (20 g soil) −1 , respectively, from all the fields”
t0“sugarcane fields in Kitadaito Island”
Claim · model-written summary
Stunt nematodes averaged 22 per 20 g soil.
- Taxon
- sugarcanet0
- Interactor
- Tylenchorhynchus sp.Tylenchorhynchuse0pest
- Outcome
- stunt ( Tylenchorhynchus sp.)e0
- Value
- 22e0
Verbatim
e0“Lesion ( Pratylenchus sp.), stunt ( Tylenchorhynchus sp.) and spiral ( Helicotylenchus sp.) nematodes were detected at mean densities of 48, 22 and 6 (20 g soil) −1 , respectively, from all the fields”
t0“sugarcane fields in Kitadaito Island”
Claim · model-written summary
Spiral nematodes averaged 6 per 20 g soil.
- Taxon
- sugarcanet0
- Interactor
- Helicotylenchus sp.
Helicotylenchuse0pest - Outcome
- spiral ( Helicotylenchus sp.)e0
- Value
- 6 (20 g soil) −1e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Lesion ( Pratylenchus sp.), stunt ( Tylenchorhynchus sp.) and spiral ( Helicotylenchus sp.) nematodes were detected at mean densities of 48, 22 and 6 (20 g soil) −1 , respectively, from all the fields”
t0“sugarcane fields in Kitadaito Island”
Claim · model-written summary
Lance and ring nematodes occurred in half of fields.
- Taxon
- sugarcanet0
- Interactor
- Hoplolaimus sp.Hoplolaimuse0pest
- Outcome
- lance ( Hoplolaimus sp.) and ring nematodese0
- Value
- half of the fieldse0
Verbatim
e0“lance ( Hoplolaimus sp.) and ring nematodes from half of the fields”
t0“sugarcane fields in Kitadaito Island”
Claim · model-written summary
Fosthiazate reduced the number of plant-parasitic nematodes.
- Taxon
- sugarcanet0
- Treatment
- a nematicide fosthiazatee0
- Interactor
- PPNe0pest
- Outcome
- number of PPNe0
- Direction
- decreasede0
Not reportedComparator
Verbatim
e0“the number of PPN decreased by applying a nematicide fosthiazate”
t0“sugarcane fields in Kitadaito Island”
Claim · model-written summary
Nematicide-treated soils increased sugarcane seedling biomass by 34–63% against untreated soil.
Verbatim
e0“sugarcane seedling biomass was significantly greater by 34-63% in soils with applied nematicide than in non-applied control soils”
t0“sugarcane fields in Kitadaito Island”
Claim · model-written summary
The authors infer that nematodes may suppress sugarcane growth on Kitadaito Island.
Verbatim
e0“suggesting that PPN may suppress sugarcane growth in Kitadaito Island.”
t0“sugarcane fields in Kitadaito Island”
The same questions in other papers
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5 papers in the same direction as this paper · 1 reporting no difference from an alternative
- no effect
- positive
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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.