Abstract
The effects of ethanolic extract of neem, Azadirachta indica (Meliaceae), seeds and petroleum ether extract of Lantana camara leaves (Verbenaceae) on the populations of three cabbage pests, Plutella xylostella, Brevicoryne brassicae and Hellula undalis were studied. The study was conducted between January and April 2008. Extracts of the two plants were sprayed on cabbage plants to control these pests. A standard synthetic chemical insecticide (Mektin) was used as reference product. The experiment was conducted in a randomized complete block design and each treatment was replicated four times. The effects of plant extracts on the population dynamics of the pests’ species, the level of infestation and yield were assessed. Significantly more of the pests infested the control plants than the treated plants (P< 0.01). The mean weight of cabbage heads on the sprayed plots was significantly heavier than that of the control unsprayed plots. The use of A. indica seeds and L. camara leaf extracts increased yield by 37.05% and 25.80%, respectively. Spraying the cabbage plants with the plant extracts significantly reduced the numbers of pests compared with the control plants. The use of these plant extracts can be incorporated into an overall control programme of these pests.
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Claims 6
Claim · model-written summary
Control cabbage plants carried significantly more pests than extract-treated plants.
Not reportedTaxon
Verbatim
e0“Significantly more of the pests infested the control plants than the treated plants (P< 0.01)”
Claim · model-written summary
Sprayed cabbage plots had significantly heavier heads than unsprayed controls.
- Taxon
- cabbage
Brassica oleracea var. capitatae0 - Treatment
- sprayed plotse0
- Outcome
- mean weight of cabbage headse0
- Direction
- heaviere0
- Comparator
- control unsprayed plotse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The mean weight of cabbage heads on the sprayed plots was significantly heavier than that of the control unsprayed plots”
Claim · model-written summary
Azadirachta indica seed extract increased cabbage yield by 37.05%.
Not reportedTaxonComparator
Verbatim
e0“The use of A. indica seeds and L. camara leaf extracts increased yield by 37.05% and 25.80%, respectively”
Claim · model-written summary
Lantana camara leaf extract increased cabbage yield by 25.80%.
Not reportedTaxonComparator
Verbatim
e0“The use of A. indica seeds and L. camara leaf extracts increased yield by 37.05% and 25.80%, respectively”
Claim · model-written summary
Spraying plant extracts significantly reduced pest numbers relative to control plants.
- Taxon
- cabbageBrassica oleracea var. capitatae0
- Treatment
- plant extractse0
- Outcome
- numbers of pestse0
- Direction
- reducede0
- Comparator
- control plantse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Spraying the cabbage plants with the plant extracts significantly reduced the numbers of pests compared with the control plants”
Claim · model-written summary
The authors recommend incorporating neem and lantana extracts into a pest-control programme.
Not reportedTaxon
Verbatim
e0“The use of these plant extracts can be incorporated into an overall control programme of these pests”
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