Abstract
The aim of the current study is to assess the toxicity of Austroplenckia populnea leaf extracts towards the Spodoptera frugiperda population in laboratory conditions. Initially, a crude methanolic extract was obtained from dried leaves of A. populnea. This extract was fractionated using hexane, ethyl acetate, and then methanol. Neonate S. frugiperda larvae were isolated in plastic containers and fed (once) on corn leaf fragments treated with crude and fractions of the investigated plant extracts. The life cycle of the larvae treated with the extracts was monitored. In addition to the intake of leaves treated with the plant extracts, such variables as larval and pupal mortality rate, larval and pupal weight, and larval, pupal, and adult stage duration were evaluated. The crude, hexane, and methanol extract fractions exerted an antixenosis effect on the feeding behaviour of neonate S. frugiperda larvae. A significant antibiosis effect was observed for the hexane fraction of the A. populnea extract, since all of its concentrations promoted a S. frugiperda larval mortality rate differing from that observed for the control. The pupal mortality rate was low, but it did not differ significantly from the mortality rate observed for the control treatment, which was nil. The larvicidal effect of the A. populnea leaf extract, mainly of its hexane fraction, has indicated its potential to be used in integrated S. frugiperda management programs.
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Claims 5
Claim · model-written summary
Crude extract deterred neonate larval feeding.
- Taxon
- corn
Zea mays subsp. mayst0 - Treatment
- crudee0
- Interactor
- S. frugiperda
.jpg?width=60)
Spodoptera frugiperdae0pest - Outcome
- feeding behaviour of neonate S. frugiperda larvaee0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
.jpg?width=500)
Verbatim
e0“The crude, hexane, and methanol extract fractions exerted an antixenosis effect on the feeding behaviour of neonate S. frugiperda larvae.”
t0“corn leaf fragments”
Claim · model-written summary
Hexane fraction deterred neonate larval feeding.
- Taxon
- cornZea mays subsp. mayst0
- Treatment
- hexanee0
- Interactor
- S. frugiperdaSpodoptera frugiperdae0pest
- Outcome
- feeding behaviour of neonate S. frugiperda larvaee0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The crude, hexane, and methanol extract fractions exerted an antixenosis effect on the feeding behaviour of neonate S. frugiperda larvae.”
t0“corn leaf fragments”
Claim · model-written summary
Methanol fraction deterred neonate larval feeding.
- Taxon
- cornZea mays subsp. mayst0
- Treatment
- methanole0
- Interactor
- S. frugiperdaSpodoptera frugiperdae0pest
- Outcome
- feeding behaviour of neonate S. frugiperda larvaee0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The crude, hexane, and methanol extract fractions exerted an antixenosis effect on the feeding behaviour of neonate S. frugiperda larvae.”
t0“corn leaf fragments”
Claim · model-written summary
All concentrations of hexane fraction changed larval mortality relative to control.
- Taxon
- cornZea mays subsp. mayst0
- Treatment
- hexane fractiont1
- Interactor
- S. frugiperdaSpodoptera frugiperdae0pest
- Outcome
- S. frugiperda larval mortality ratee0
- Comparator
- controle0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“all of its concentrations promoted a S. frugiperda larval mortality rate differing from that observed for the control.”
t0“corn leaf fragments”
t1“hexane fraction of the A. populnea extract”
Claim · model-written summary
Pupal mortality did not differ significantly from the nil control.
- Taxon
- cornZea mays subsp. mayst0
- Treatment
- plant extractst1
- Interactor
- S. frugiperdaSpodoptera frugiperdae1pest
- Outcome
- pupal mortality ratee0
- Direction
- did not differe0
- Comparator
- control treatmente0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The pupal mortality rate was low, but it did not differ significantly from the mortality rate observed for the control treatment, which was nil.”
t0“corn leaf fragments”
t1“intake of leaves treated with the plant extracts”
e1“Neonate S. frugiperda larvae”
The same questions in other papers
methanol · Spodoptera frugiperda · Zea mays (maize)Positive and negative results
1 paper in the same direction as this paper · 1 in the opposite direction
- no effect
- positive
hexane · Spodoptera frugiperda · Zea mays (maize)Results agree
1 paper in the same direction as this paper
- positive
botanical · Spodoptera frugiperda · Zea mays (maize)Positive and negative results
3 papers in the same direction as this paper · 49 in the opposite direction
- positive
- positive
- positive
49 papers more in this group
See all 53 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.