Abstract
The emergence ofbiodegradable pesticides as safe option has reduced the problems that resultfrom the use of synthetic insecticides, thus creating a renewed interest intheir development and use in integrated pest management of crops. The objectiveof this study was to investigate the insecticidal properties of the water extractsof Jatropha curcas, Vernonia amygdalina, Ageratum conyzoides, Chromolaenaodorata (L) and Annona squamosa on two species of flea beetles (Podagricauniforma and P. sjostedti (Coleoptera : Chrysomelidae)infesting okra (Abelmoschus esculentus (L.) Moench), variety NHAE 47-4).The leaves and seeds of the plants used in the experiment were collected fromthe locality, washed and shade dried. A synthetic insecticide,lambda-cyhalothrin (karate) was included in the treatments as a standard checkalongside the untreated (control). The experiment was laid out in a randomizedcomplete block design (RCBD) with seven treatments and four replicates. Theefficacy of the treatments was based on reduction in flea beetles and percentagereduction in population of the pests. The results showed that only three of theplant extracts (Jatropha curcas, Vernonia amygdalina and Annona squamosa)significantly (P < 0.05) reduced the population of the two flea beetles at64%, 55% and 49%, respectively. Though the other two botanicals were notsignificant in reducing the population of the pests, they were better than thecontrol. All the plant extracts tested were not as effective as the syntheticinsecticide in reducing flea beetles population. Among the tested plants, J.curcas, was found to be more effective, hence its use by resource poorfarmers is recommended in the protection of okra against the infestation of P.uniforma and P. sjostedti.
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Claims 7
Claim · model-written summary
Jatropha curcas extract significantly reduced the flea beetle population by 64% relative to the untreated control.
- Taxon
- okra
.jpg?width=60)
Abelmoschus esculentuse0 - Treatment
- Jatropha curcase1
- Outcome
- population of the two flea beetlese2
- Direction
- reducede2
- Value
- 64%e2
- Comparator
- untreated (control)e3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
.jpg?width=500)
Verbatim
e0“infesting okra (Abelmoschus esculentus (L.) Moench), variety NHAE 47-4”
e1“Jatropha curcas, Vernonia amygdalina and Annona squamosa”
e2“significantly (P < 0.05) reduced the population of the two flea beetles at64%, 55% and 49%, respectively”
e3“alongside the untreated (control)”
Claim · model-written summary
Vernonia amygdalina extract significantly reduced the flea beetle population by 55% relative to the untreated control.
- Taxon
- okraAbelmoschus esculentuse0
- Treatment
- Vernonia amygdalinae1
- Outcome
- population of the two flea beetlese2
- Direction
- reducede2
- Value
- 55%e2
- Comparator
- untreated (control)e3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“infesting okra (Abelmoschus esculentus (L.) Moench), variety NHAE 47-4”
e1“Jatropha curcas, Vernonia amygdalina and Annona squamosa”
e2“significantly (P < 0.05) reduced the population of the two flea beetles at64%, 55% and 49%, respectively”
e3“alongside the untreated (control)”
Claim · model-written summary
Annona squamosa extract significantly reduced the flea beetle population by 49% relative to the untreated control.
- Taxon
- okraAbelmoschus esculentuse0
- Treatment
- Annona squamosae1
- Outcome
- population of the two flea beetlese2
- Direction
- reducede2
- Value
- 49%e2
- Comparator
- untreated (control)e3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“infesting okra (Abelmoschus esculentus (L.) Moench), variety NHAE 47-4”
e1“Jatropha curcas, Vernonia amygdalina and Annona squamosa”
e2“significantly (P < 0.05) reduced the population of the two flea beetles at64%, 55% and 49%, respectively”
e3“alongside the untreated (control)”
Claim · model-written summary
The other two botanical extracts did not significantly reduce flea beetle populations but were better than the control.
- Taxon
- okraAbelmoschus esculentuse0
- Treatment
- other two botanicalse4
- Outcome
- population of the pestse4
- Direction
- bettere4
- Comparator
- controle4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“infesting okra (Abelmoschus esculentus (L.) Moench), variety NHAE 47-4”
e4“Though the other two botanicals were notsignificant in reducing the population of the pests, they were better than thecontrol”
Claim · model-written summary
All tested plant extracts were less effective than the synthetic insecticide in reducing flea beetle populations.
- Taxon
- okraAbelmoschus esculentuse0
- Treatment
- plant extractse5
- Outcome
- reducing flea beetles populatione5
- Direction
- lowerinferrede5
- Comparator
- synthetic insecticidee5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“infesting okra (Abelmoschus esculentus (L.) Moench), variety NHAE 47-4”
e5“All the plant extracts tested were not as effective as the syntheticinsecticide in reducing flea beetles population”
Claim · model-written summary
Jatropha curcas was more effective than the other tested plants against flea beetles on okra.
- Taxon
- okraAbelmoschus esculentuse0
- Treatment
- J.curcase6
- Outcome
- effectivee6
- Direction
- more effectivee6
- Comparator
- tested plantse6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“infesting okra (Abelmoschus esculentus (L.) Moench), variety NHAE 47-4”
e6“Among the tested plants, J.curcas, was found to be more effective”
Claim · model-written summary
Use of J. curcas by resource-poor farmers is recommended for protecting okra against P. uniforma and P. sjostedti.
- Taxon
- okraAbelmoschus esculentuse0
- Interactor
- P.uniformae7pest
- Second interactor
- P. sjostedtie7pest
- Outcome
- protection of okrae7
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“infesting okra (Abelmoschus esculentus (L.) Moench), variety NHAE 47-4”
e7“its use by resource poorfarmers is recommended in the protection of okra against the infestation of P.uniforma and P. sjostedti”
The same questions in other papers
botanical · pest · Abelmoschus esculentus (okra)Positive and negative results
3 papers in the same direction as this paper · 51 in the opposite direction
- positive
- positive
- positive
51 papers more in this group
See all 55 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.