Abstract
Introduction: Sweet potato weevil (Cylas punticollis) is a pest of economic importance with negative impacts on sweet potato production. Due to the hazardous nature of insecticides, deploying plant extracts against this pest is an eco-friendly alternative. Aim: This study aimed to evaluate the potential of extracts of Khaya and Trichilia plants for antifeedant activity and toxicity against adult C. punticollis. Methodology: In this study, the leaves and barks of Khaya senegalensis and Trichilia emetica plants were tested for antifeedant activity and toxicity against adult C. punticollis at 2.5ppm, 5ppm, 10ppm, 20ppm and 40ppm through the No-choice bioassay method. Ethanol and aqueous solvents served as negative checks, and Lara force as a positive check. An independent sample t-test was used to analyze the differences between the feeding holes on the treated strip and the feeding holes on the control strip. Tukey’s multiple test was used to assess the differences in antifeedant rates of the two botanicals and different concentrations. Results with p < 0.05 were considered significant. Results: The results revealed that Lara force caused the strongest feeding deterrence against C. punticollis. Among the plant extracts, the highest (56.23%) and the lowest (11.73%) percentage of feeding punctures were observed in the ethanolic and aqueous extracts of the leaves of T. emetica, respectively. However, the antifeedant potency of the plant extracts treated potato slips did not significantly differ from the control slips after 24 hours of weevil exposure to potato slips. The mortality of C. punticollis was dependent on the concentration of the extracts and the duration of exposure to the plant extracts. The highest percentage of mortality (90%) was recorded at 40 ppm among the plant extracts. The order of toxicity among the treatments includes 40 ppm > 20 ppm > positive check > 10 ppm > 5 ppm > 2.5 ppm > negative control. Conclusion: Overall, this study accentuates the potential of extracts from Khaya and Trichilia plants and their application in managing sweet potato weevil.
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 6
Claim · model-written summary
Lara force caused the strongest feeding deterrence against the sweet potato weevil.
- Taxon
- sweet potato
_Flower.jpg?width=60)
Ipomoea batatase0 - Treatment
- Lara forcee1
- Interactor
- C. punticollise1pest
- Outcome
- feeding deterrencee1
- Direction
- strongeste1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
_Flower.jpg?width=500)
Verbatim
e0“with negative impacts on sweet potato production”
e1“Lara force caused the strongest feeding deterrence against C. punticollis”
Claim · model-written summary
The highest feeding punctures (56.23%) among the extracts were observed for ethanolic and aqueous extracts of T. emetica leaves.
- Taxon
- T. emetica
Trichilia emeticae2 - Treatment
- ethanolic and aqueous extracts of the leaves of T. emeticae2
- Outcome
- percentage of feeding puncturese2
- Direction
- higheste2
- Value
- 56.23%e2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e2“the highest (56.23%) and the lowest (11.73%) percentage of feeding punctures were observed in the ethanolic and aqueous extracts of the leaves of T. emetica”
Claim · model-written summary
The lowest feeding punctures (11.73%) among the extracts were observed for ethanolic and aqueous extracts of T. emetica leaves.
- Taxon
- T. emeticaTrichilia emeticae2
- Treatment
- ethanolic and aqueous extracts of the leaves of T. emeticae2
- Outcome
- percentage of feeding puncturese2
- Direction
- loweste2
- Value
- 11.73%e2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e2“the highest (56.23%) and the lowest (11.73%) percentage of feeding punctures were observed in the ethanolic and aqueous extracts of the leaves of T. emetica”
Claim · model-written summary
The highest mortality (90%) of the sweet potato weevil among the plant extracts was recorded at 40 ppm.
- Taxon
- sweet potatoIpomoea batatase0
- Treatment
- 40 ppme5
- Outcome
- percentage of mortalitye5
- Direction
- higheste5
- Value
- 90%e5
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“with negative impacts on sweet potato production”
e5“The highest percentage of mortality (90%) was recorded at 40 ppm among the plant extracts”
Claim · model-written summary
Mortality of the sweet potato weevil depended on the concentration of the extracts and the duration of exposure.
- Taxon
- sweet potatoIpomoea batatase0
- Treatment
- concentration of the extractse3
- Interactor
- C. punticollise3pest
- Outcome
- mortalitye3
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“with negative impacts on sweet potato production”
e3“The mortality of C. punticollis was dependent on the concentration of the extracts and the duration of exposure to the plant extracts”
Claim · model-written summary
Antifeedant potency of the plant extracts on potato slips did not significantly differ from the control slips after 24 hours.
- Taxon
- potato
Solanum tuberosume4 - Treatment
- plant extracts treated potato slipse4
- Outcome
- antifeedant potencye4
- Direction
- did not significantly differe4
- Comparator
- control slipse4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e4“the antifeedant potency of the plant extracts treated potato slips did not significantly differ from the control slips after 24 hours”
The same questions in other papers
botanical · pest · Solanum tuberosum (potato)Positive and negative results
3 papers in the same direction as this paper · 32 in the opposite direction
- positive
- positive
- positive
32 papers more in this group
See all 36 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.