Abstract
The African sweet potato weevil, Cylas puncticollis, and fall armyworm, Spodoptera frugiperda, are insect pests of economic importance that have a negative impact on sweet potato and maize production, respectively. In this study, we aimed to evaluate the potential of Melia volkensii extracts to protect sweet potato and maize plants against damage by both insect pests. We evaluated extracts from the bark, leaves, pulp and nuts of Melia volkensii for antifeedant activity against C. puncticollis and S. exigua (used as a substitute for S. frugiperda), under laboratory conditions. Interestingly, extracts of all plant parts showed antifeedant activity. These results led us to investigate the effectiveness of nut and pulp extracts to protect sweet potato and maize crops in greenhouse conditions. Against C. puncticollis, the sweet potato plants treated with nut extracts showed the lowest tuber damage (18%) when compared to pulp extracts (30%), positive control (33%) and negative control (76%). Nut extracts, pulp extracts and positive control reduced maize leaf and whorl damage by S. frugiperda compared to the negative control. Altogether, this study highlights the potential of M. volkensii extracts and their application in integrated insect pest management
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Claims 6
Claim · model-written summary
Extracts of all tested Melia plant parts showed antifeedant activity against C. puncticollis.
- Taxon
- sweet potato
_Flower.jpg?width=60)
Ipomoea batatase2 - Treatment
- extracts from the bark, leaves, pulp and nuts of Melia volkensiie0
- Interactor
- C. puncticollisCylas puncticollise0pest
- Outcome
- antifeedant activitye1
- Setting
- Melia volkensiie0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
_Flower.jpg?width=500)
Verbatim
e0“extracts from the bark, leaves, pulp and nuts of Melia volkensii for antifeedant activity against C. puncticollis and S. exigua”
e1“extracts of all plant parts showed antifeedant activity”
e2“sweet potato and maize plants”
Claim · model-written summary
Extracts of all tested Melia plant parts showed antifeedant activity against S. exigua.
- Treatment
- extracts from the bark, leaves, pulp and nuts of Melia volkensiie0
- Interactor
- S. exigua
Spodoptera exiguae0pest - Outcome
- antifeedant activitye1
Zea maysOrganisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“extracts from the bark, leaves, pulp and nuts of Melia volkensii for antifeedant activity against C. puncticollis and S. exigua”
e1“extracts of all plant parts showed antifeedant activity”
e2“sweet potato and maize plants”
Claim · model-written summary
Nut extract treatment gave sweet potato the lowest C. puncticollis tuber damage, 18%, versus pulp extract at 30%, positive control at 33%, and negative control at 76%.
- Taxon
- sweet potatoIpomoea batatase0
- Treatment
- nut extractse0
- Interactor
- C. puncticollisCylas puncticollise0pest
- Outcome
- tuber damagee0
- Direction
- loweste0
- Value
- 18%e0
- Qualifier
- positive control (33%) and negative control (76%)e0
- Comparator
- pulp extractse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Against C. puncticollis, the sweet potato plants treated with nut extracts showed the lowest tuber damage (18%) when compared to pulp extracts (30%), positive control (33%) and negative control (76%).”
Claim · model-written summary
Nut extracts reduced S. frugiperda damage to maize leaf and whorl relative to negative control.
- Treatment
- Nut extractse0
- Interactor
- S. frugiperda
.jpg?width=60)
Spodoptera frugiperdae0pest - Outcome
- maize leaf and whorl damage by S. frugiperdae0
- Direction
- reducede0
- Comparator
- negative controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
.jpg?width=500)
Verbatim
e0“Nut extracts, pulp extracts and positive control reduced maize leaf and whorl damage by S. frugiperda compared to the negative control.”
Claim · model-written summary
pulp extracts reduced S. frugiperda damage to maize leaf and whorl relative to negative control.
- Treatment
- pulp extractse0
- Interactor
- S. frugiperdaSpodoptera frugiperdae0pest
- Outcome
- maize leaf and whorl damage by S. frugiperdae0
- Direction
- reducede0
- Comparator
- negative controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Nut extracts, pulp extracts and positive control reduced maize leaf and whorl damage by S. frugiperda compared to the negative control.”
Claim · model-written summary
positive control reduced S. frugiperda damage to maize leaf and whorl relative to negative control.
- Treatment
- positive controle0
- Interactor
- S. frugiperdaSpodoptera frugiperdae0pest
- Outcome
- maize leaf and whorl damage by S. frugiperdae0
- Direction
- reducede0
- Comparator
- negative controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Nut extracts, pulp extracts and positive control reduced maize leaf and whorl damage by S. frugiperda compared to the negative control.”
The same questions in other papers
botanical · Spodoptera frugiperda · Zea mays (maize)Positive and negative results
48 papers in the same direction as this paper · 3 in the opposite direction · 1 reporting no difference from an alternative
- positive
- no effect
- negative
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See all 53 papers →botanical · Cylas puncticollis · Ipomoea batatas (sweet potato)Results agree
6 papers in the same direction as this paper
- positive
- positive
- positive
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See all 7 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.