Abstract
Experiments were carried out to study the efficacy of an entomopathogenic nematode (EPN), Rhabditis (Oscheius) sp. against yellow stem borer (YSB), Scirpophaga incertulas in rice. The effect of EPN on egg mass and field collected larval populations of the stem borer was investigated under greenhouse and laboratory conditions. Infection by the EPNs resulted in mortality of the egg mass and the neonate larvae that emerged from the eggs. The EPN was more effective in the dry season than in the wet season on the field collected larvae. The time taken for larval mortality of YSB and the multiplication rate of the nematode was inversely correlated with the dose in the dry season. Inoculation of Rhabditis (Oscheius) sp. with the stem dip method was more effective than with filter paper impregnation technique. Spray application of EPN (at 2000 IJs/pot) to potted plants pinned with YSB egg mass in the greenhouse resulted in lower dead heart damage.
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Claims 6
Claim · model-written summary
Nematode infection caused mortality of stem-borer egg masses and emerging larvae.
- Taxon
- rice
Oryza sativae0 - Treatment
- EPNse1
- Interactor
- Scirpophaga incertulas
Scirpophaga incertulase0pest - Outcome
- mortality of the egg mass and the neonate larvaee1
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Rhabditis (Oscheius) sp. against yellow stem borer (YSB), Scirpophaga incertulas in rice.”
e1“Infection by the EPNs resulted in mortality of the egg mass and the neonate larvae that emerged from the eggs.”
Claim · model-written summary
The nematode was more effective against field-collected larvae in the dry season.
- Taxon
- riceOryza sativae0
- Interactor
- Scirpophaga incertulasScirpophaga incertulase0pest
- Outcome
- effectivee1
- Direction
- more effectivee1
- Comparator
- wet seasone1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Rhabditis (Oscheius) sp. against yellow stem borer (YSB), Scirpophaga incertulas in rice.”
e1“The EPN was more effective in the dry season than in the wet season on the field collected larvae.”
Claim · model-written summary
Time to larval mortality was inversely correlated with nematode dose in the dry season.
- Taxon
- riceOryza sativae0
- Treatment
- dosee1
- Interactor
- YSBe1pest
- Outcome
- time taken for larval mortality of YSBe1
- Direction
- inversely correlatede1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Rhabditis (Oscheius) sp. against yellow stem borer (YSB), Scirpophaga incertulas in rice.”
e1“The time taken for larval mortality of YSB and the multiplication rate of the nematode was inversely correlated with the dose in the dry season.”
Claim · model-written summary
Nematode multiplication rate was inversely correlated with dose in the dry season.
- Taxon
- riceOryza sativae0
- Treatment
- dosee1
- Outcome
- multiplication rate of the nematodee1
- Direction
- inversely correlatede1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Rhabditis (Oscheius) sp. against yellow stem borer (YSB), Scirpophaga incertulas in rice.”
e1“The time taken for larval mortality of YSB and the multiplication rate of the nematode was inversely correlated with the dose in the dry season.”
Claim · model-written summary
Stem-dip nematode inoculation was more effective than filter-paper impregnation.
- Taxon
- riceOryza sativae0
- Treatment
- stem dip methode1
- Interactor
- Scirpophaga incertulasScirpophaga incertulase0pest
- Outcome
- more effectivee1
- Direction
- more effectivee1
- Comparator
- filter paper impregnation techniquee1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Rhabditis (Oscheius) sp. against yellow stem borer (YSB), Scirpophaga incertulas in rice.”
e1“Inoculation of Rhabditis (Oscheius) sp. with the stem dip method was more effective than with filter paper impregnation technique.”
Claim · model-written summary
Nematode spray on potted plants lowered dead-heart damage.
- Taxon
- riceOryza sativae0
- Treatment
- Spray application of EPN (at 2000 IJs/pot)e1
- Interactor
- YSBe1pest
- Outcome
- dead heart damagee1
- Direction
- lowere1
- Setting
- greenhousee1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Rhabditis (Oscheius) sp. against yellow stem borer (YSB), Scirpophaga incertulas in rice.”
e1“Spray application of EPN (at 2000 IJs/pot) to potted plants pinned with YSB egg mass in the greenhouse resulted in lower dead heart damage.”
The same questions in other papers
biocontrol · pest · Oryza sativa (rice)Positive and negative results
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- negative
- positive
- positive
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See all 7 papers →application · pest · Oryza sativa (rice)Positive and negative results
36 papers in the same direction as this paper · 6 in the opposite direction
- negative
- no effect
- negative
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See all 43 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.