Abstract
The efficacies of crude extracts of the stem bark of Khaya grandifoliola; K. senegalensis and K. nyasica (Meliaceae), collected within the same Nigerian ecological zone, at 0, 250, 500 and 1000 ppm were investigated as cowpea protectants against Cowpea bruchid (Callosobruchus maculatus Fabricius) under laboratory conditions at 27 + 2 o C temperature and 77 + 8% relative humidity. All Khaya extracts at 250 -1000ppm significantly reduced the oviposition of C. maculatus in treated cowpea seeds. Seeds treated with extract of K. grandifoliola had the least mean number of eggs (75.5) laid on them compared with the control (310.00). Similarly, all Khaya extracts at 500-1000ppm caused significant reduction in reproductive efficiency of C. maculatus, and the lowest significant reproductive efficiency (47.9%) was recorded in extract of K. grandifoliola at 1000ppm concentration. When topically applied, significant mortalities in cowpea bruchid adults were observed at 1000ppm concentration of K. grandifoliola and K. nyasica extracts. The body weight of emerged F1 adults from seeds treated with the three Khaya species were not found to be significantly different.
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Claims 7
Claim · model-written summary
Khaya extracts at 250–1000 ppm significantly reduced bruchid oviposition on cowpea seeds.
- Taxon
- cowpea
Vigna unguiculatae0 - Treatment
- Khaya extracts at 250 -1000ppme0
- Interactor
- C. maculatus
Callosobruchus maculatuse0pest - Outcome
- oviposition of C. maculatuse0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“All Khaya extracts at 250 -1000ppm significantly reduced the oviposition of C. maculatus in treated cowpea seeds”
Claim · model-written summary
K. grandifoliola extract yielded 75.5 eggs versus 310.00 in the control.
- Taxon
- cowpeaVigna unguiculatat0
- Treatment
- extract of K. grandifoliolae0
- Interactor
- C. maculatusCallosobruchus maculatuse1pest
- Outcome
- mean number of eggse0
- Direction
- leaste0
- Value
- 75.5e0
- Qualifier
- 310.00e0
- Comparator
- the controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Seeds treated with extract of K. grandifoliola had the least mean number of eggs (75.5) laid on them compared with the control (310.00)”
t0“cowpea seeds”
e1“oviposition of C. maculatus”
Claim · model-written summary
All Khaya extracts at 500–1000 ppm reduced bruchid reproductive efficiency.
- Taxon
- cowpeaVigna unguiculatat0
- Treatment
- Khaya extracts at 500-1000ppme0
- Interactor
- C. maculatusCallosobruchus maculatuse0pest
- Outcome
- reproductive efficiency of C. maculatuse0
- Direction
- reductione0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“all Khaya extracts at 500-1000ppm caused significant reduction in reproductive efficiency of C. maculatus”
t0“cowpea seeds”
Claim · model-written summary
K. grandifoliola at 1000 ppm gave the lowest bruchid reproductive efficiency, 47.9%.
- Taxon
- cowpeaVigna unguiculatat0
- Treatment
- extract of K. grandifoliola at 1000ppm concentratione0
- Interactor
- C. maculatusCallosobruchus maculatuse1pest
- Outcome
- reproductive efficiencye0
- Direction
- loweste0
- Value
- 47.9%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the lowest significant reproductive efficiency (47.9%) was recorded in extract of K. grandifoliola at 1000ppm concentration”
t0“cowpea seeds”
e1“reproductive efficiency of C. maculatus”
Claim · model-written summary
Topical K. grandifoliola extract at 1000 ppm increased adult bruchid mortality.
- Taxon
- cowpeaVigna unguiculatae0
- Treatment
- 1000ppm concentration of K. grandifoliolae0
- Interactor
- cowpea bruchide0pest
- Outcome
- mortalities in cowpea bruchid adultse0
- Direction
- increaseinferrede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“significant mortalities in cowpea bruchid adults were observed at 1000ppm concentration of K. grandifoliola and K. nyasica extracts”
Claim · model-written summary
Topical K. nyasica extract at 1000 ppm increased adult bruchid mortality.
- Taxon
- cowpeaVigna unguiculatae0
- Treatment
- 1000ppm concentration of K. grandifoliola and K. nyasica extractse0
- Interactor
- cowpea bruchide0pest
- Outcome
- mortalities in cowpea bruchid adultse0
- Direction
- increaseinferrede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“significant mortalities in cowpea bruchid adults were observed at 1000ppm concentration of K. grandifoliola and K. nyasica extracts”
Claim · model-written summary
Extracts of the three Khaya species did not significantly differ in weight of emerged F1 bruchids.
- Taxon
- cowpeaVigna unguiculatat0
- Treatment
- the three Khaya speciese0
- Interactor
- C. maculatusCallosobruchus maculatuse1pest
- Outcome
- body weight of emerged F1 adultse0
- Direction
- not found to be significantly differente0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The body weight of emerged F1 adults from seeds treated with the three Khaya species were not found to be significantly different”
t0“cowpea seeds”
e1“reproductive efficiency of C. maculatus”
The same questions in other papers
botanical · pest · Vigna unguiculata (cowpea)Positive and negative results
122 papers in the same direction as this paper · 2 in the opposite direction · 1 reporting no difference from an alternative
- positive
- no effect
- no effect
122 papers more in this group
See all 126 papers →botanical · Callosobruchus maculatus · Vigna unguiculata (cowpea)Positive and negative results
157 papers in the same direction as this paper · 4 in the opposite direction · 1 reporting no difference from an alternative
- positive
- no effect
- no effect
159 papers more in this group
See all 163 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.