Abstract
Cabbage (Brassica oleracea var. capitata L.) crops are frequently attacked by aphids (Brevicoryne brassicae L.) which severely damage cabbage production. This research was conducted at an experimental cabbage field of the Institute of Environmental Science, University of Rajshahi, Bangladesh, from 15 November 2020 to 14 February 2021. This study assessed the dose-dependent efficacy of aqueous extracts from the seed of jute (Corchorus capsularis L.), leaves of bottle gourd (Lagenaria siceraria Molina Standl.), and fruit peel of lemon (Citrus limon L. Osbeck), compared with the chemical insecticide Malathion. The experiment design was laid out in a randomized complete block design (RCBD) with three replications. One-way (ANOVA) analysis was performed on the acquired data and significant differences among treatments were detected using Duncan's Multiple Range Test (p < 0.05). This study revealed that bottle gourd leaf extract at 10% and 20% (w/v) concentrations resulted in high biopesticide activity against aphids and increased cabbage yield by 12%–13%, compared with the control. The application of 30% (w/v) bottle gourd leaf extract significantly decreased aphid infestation by 28.26% and 46.83% at 45 and 60 DAT, respectively in field-grown cabbage and led to a 30.95% increase in cabbage yield compared with the Malathion. Thirteen potential chemical components of the bottle gourd leaf extract were identified using gas chromatography–mass spectrometry analysis that may possess the insecticidal ability. Results indicated that bottle gourd leaf extract has great potential as an alternative to synthetic chemical pesticides in controlling aphids in cabbage in an environmentally friendly way.
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Claims 7
Claim · model-written summary
Bottle gourd leaf extract at 10% and 20% increased cabbage yield by 12%–13% relative to control.
- Taxon
- cabbage
Brassica oleracea var. capitatae0 - Treatment
- bottle gourd leaf extract at 10% and 20% (w/v) concentrationse0
- Interactor
- aphidsAphidomorphae0pest
- Outcome
- cabbage yielde0
- Direction
- increasede0
- Value
- 12%–13%e0
- Comparator
- controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“bottle gourd leaf extract at 10% and 20% (w/v) concentrations resulted in high biopesticide activity against aphids and increased cabbage yield by 12%–13%, compared with the control”
Claim · model-written summary
Bottle gourd leaf extract at 10% and 20% had high biopesticide activity against aphids.
- Taxon
- cabbageBrassica oleracea var. capitatae1
- Treatment
- bottle gourd leaf extract at 10% and 20% (w/v) concentrationse0
- Interactor
- aphidsAphidomorphae0pest
- Outcome
- biopesticide activity against aphidse0
- Direction
- highe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“bottle gourd leaf extract at 10% and 20% (w/v) concentrations resulted in high biopesticide activity against aphids”
e1“bottle gourd leaf extract at 10% and 20% (w/v) concentrations resulted in high biopesticide activity against aphids and increased cabbage yield by 12%–13%, compared with the control”
Claim · model-written summary
At 45 DAT, 30% bottle gourd leaf extract decreased aphid infestation by 28.26%.
- Taxon
- cabbageBrassica oleracea var. capitatae0
- Treatment
- 30% (w/v) bottle gourd leaf extracte0
- Interactor
- aphide0pest
- Outcome
- aphid infestatione0
- Direction
- decreasede0
- Value
- 28.26%e0
- Qualifier
- 45 and 60 DATe0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The application of 30% (w/v) bottle gourd leaf extract significantly decreased aphid infestation by 28.26% and 46.83% at 45 and 60 DAT, respectively in field-grown cabbage”
Claim · model-written summary
At 60 DAT, 30% bottle gourd leaf extract decreased aphid infestation by 46.83%.
- Taxon
- cabbageBrassica oleracea var. capitatae0
- Treatment
- 30% (w/v) bottle gourd leaf extracte0
- Interactor
- aphide0pest
- Outcome
- aphid infestatione0
- Direction
- decreasede0
- Value
- 46.83%e0
- Qualifier
- 45 and 60 DATe0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The application of 30% (w/v) bottle gourd leaf extract significantly decreased aphid infestation by 28.26% and 46.83% at 45 and 60 DAT, respectively in field-grown cabbage”
Claim · model-written summary
The 30% bottle gourd leaf extract increased cabbage yield by 30.95% relative to Malathion.
- Taxon
- cabbageBrassica oleracea var. capitatae0
- Treatment
- 30% (w/v) bottle gourd leaf extracte0
- Outcome
- cabbage yielde0
- Direction
- increasee0
- Value
- 30.95%e0
- Comparator
- Malathione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The application of 30% (w/v) bottle gourd leaf extract significantly decreased aphid infestation by 28.26% and 46.83% at 45 and 60 DAT, respectively in field-grown cabbage and led to a 30.95% increase in cabbage yield compared with the Malathion”
Claim · model-written summary
Thirteen potential chemical components of bottle gourd leaf extract were identified.
- Taxon
- bottle gourd
Lagenaria sicerariae0 - Outcome
- potential chemical componentse0
- Value
- Thirteene0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Thirteen potential chemical components of the bottle gourd leaf extract were identified using gas chromatography–mass spectrometry analysis”
Claim · model-written summary
The authors consider bottle gourd leaf extract a potential alternative for aphid control in cabbage.
- Taxon
- cabbageBrassica oleracea var. capitatae0
- Interactor
- aphidsAphidomorphae0pest
- Outcome
- alternative to synthetic chemical pesticides in controlling aphidse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“bottle gourd leaf extract has great potential as an alternative to synthetic chemical pesticides in controlling aphids in cabbage in an environmentally friendly way”
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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.