Abstract
Under laboratory conditions (28 ± 3°C and 70 ± 5% r.h.) in Akure, Nigeria, powders of different particle sizes (212 um, 300 um, 500 um and 1 mm, respectively) made from ripe Piper guineense Schum and Thonn fruits, were evaluated at five rates of application (0, 0.1, 0.2, 0.3, 0.4 and 0.50 g/20 g of seed), for insecticidal action against Callosobruchus maculatus (F.), a major storage pest of cowpea, Vigna unguiculata (L.) Walp. Treatments involved introducing freshly emerged beetles onto protected and unprotected cowpea seeds in airtight glass tubes or plastic plates. Irrespective of particle size of powder, all rates of application significantly reduced (P < 0.05) oviposition and adult emergence of C. maculatus compared with the control. Similarly, all introduced freshly emerged adult beetles were killed within 36 hours. The susceptibility of adult beetles to P. guineense powder increased significantly with the age of the beetle. Powder of particle size of 212 um was always more potent than powder of particle size of 1mm.
Abstract from the paper’s OpenAlex record, shown for indexing and research. Copyright remains with the authors or the publisher. Read at the source ↗
The text the model read, with the source record’s inline markup (italics, sub- and superscripts) rendered and its character entities decoded; quote offsets refer to the raw text.
Claims 5
Claim · model-written summary
All powder application rates reduced cowpea pest oviposition relative to control.
- Taxon
- cowpea
Vigna unguiculatae1 - Treatment
- all rates of applicatione0
- Interactor
- C. maculatus
Callosobruchus maculatuse0pest - Outcome
- ovipositione0
- Direction
- reducede0
- Comparator
- the controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Irrespective of particle size of powder, all rates of application significantly reduced (P < 0.05) oviposition and adult emergence of C. maculatus compared with the control”
e1“a major storage pest of cowpea, Vigna unguiculata (L.) Walp.”
Claim · model-written summary
All powder application rates reduced cowpea pest adult emergence relative to control.
- Taxon
- cowpeaVigna unguiculatae1
- Treatment
- all rates of applicatione0
- Interactor
- C. maculatusCallosobruchus maculatuse0pest
- Outcome
- adult emergence of C. maculatuse0
- Direction
- reducede0
- Comparator
- the controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Irrespective of particle size of powder, all rates of application significantly reduced (P < 0.05) oviposition and adult emergence of C. maculatus compared with the control”
e1“a major storage pest of cowpea, Vigna unguiculata (L.) Walp.”
Claim · model-written summary
All introduced adult beetles were killed within 36 hours.
- Taxon
- cowpeaVigna unguiculatae2
- Treatment
- powderse1
- Interactor
- adult beetlese0pest
- Outcome
- adult beetles were killede0
- Value
- 36 hourse0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“all introduced freshly emerged adult beetles were killed within 36 hours”
e1“powders of different particle sizes (212 um, 300 um, 500 um and 1 mm, respectively) made from ripe Piper guineense Schum and Thonn fruits”
e2“a major storage pest of cowpea, Vigna unguiculata (L.) Walp.”
Claim · model-written summary
Adult beetle susceptibility to Piper powder increased with beetle age.
- Taxon
- cowpeaVigna unguiculatae1
- Organ / stage
- age of the beetlee0
- Interactor
- adult beetlese0pest
- Outcome
- susceptibility of adult beetles to P. guineense powdere0
- Direction
- increasede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The susceptibility of adult beetles to P. guineense powder increased significantly with the age of the beetle”
e1“storage pest of cowpea”
Claim · model-written summary
The 212 um Piper powder was more potent than the 1 mm powder.
- Taxon
- cowpeaVigna unguiculatae1
- Treatment
- Powder of particle size of 212 ume0
- Outcome
- more potente0
- Direction
- more potente0
- Comparator
- powder of particle size of 1mme0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Powder of particle size of 212 um was always more potent than powder of particle size of 1mm”
e1“storage pest of cowpea”
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 →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.