Abstract
Cabbage is an important exotic vegetable widely grown in Ghana. Despite its importance, cabbage production is constrained by insect pests attack, with the diamondback moth (DBM), Plutella xylostella L. and the Indian mustard aphid, Lipaphis erysimi pseudobrassicae (Davis) as the most important. A field trial was conducted at the Soil and Irrigation Research Centre, Kpong, in Ghana, during the major and minor rainy seasons of 2013 to study the effect of intercropping and soil amendment on the incidence of these key pests, their natural enemies and the yield of crop. The field was laid out as a split-plot design with soil amendment (biochar from rice husk, poultry manure and their combination) as the main plot and cropping system (sole cabbage, sole onion and cabbage-onion intercrop) as sub-plots. Multiple head formation was higher in sole cabbage plots than cabbage intercropped with onion. Similarly, sole cabbage plots supported a higher number of DBM larvae than cabbage intercropped with onion. Cabbage planted on soils without amendment, generally supported a fewer number of DBM larvae and natural enemies than the amended soils. The effect of the different treatments on the aphids population was not significant. The intercrop had the highest number of beneficial insects. The effect of soil amendment on the yield of cabbage and onion was significant with poultry manure plots recording the highest yield. The effect of cropping system was also significant on the yield of onion, with sole onion obtaining higher yields than onion intercropped with cabbage. The use of soil amendment also significantly improved the soil chemical and physical properties. Intercropping and soil amendment, therefore, have a lot of potential in sustainable vegetable production.
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Claims 12
Claim · model-written summary
Multiple head formation was higher in sole cabbage plots than in cabbage intercropped with onion.
- Taxon
- cabbage
Brassica oleracea var. capitatae0 - Treatment
- sole cabbage plotse0
- Outcome
- Multiple head formatione0
- Direction
- highere0
- Comparator
- cabbage intercropped with onione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Multiple head formation was higher in sole cabbage plots than cabbage intercropped with onion”
Claim · model-written summary
Sole cabbage plots supported a higher number of diamondback moth larvae than cabbage intercropped with onion.
- Taxon
- cabbageBrassica oleracea var. capitatae0
- Treatment
- sole cabbage plotse0
- Interactor
- DBMe0pest
- Outcome
- number of DBM larvaee0
- Direction
- highere0
- Comparator
- cabbage intercropped with onione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“sole cabbage plots supported a higher number of DBM larvae than cabbage intercropped with onion”
Claim · model-written summary
Cabbage on unamended soils generally supported fewer diamondback moth larvae than on amended soils.
- Taxon
- CabbageBrassica oleracea var. capitatae0
- Treatment
- soils without amendmente0
- Interactor
- DBMe0pest
- Outcome
- number of DBM larvaee0
- Direction
- fewere0
- Comparator
- the amended soilse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Cabbage planted on soils without amendment, generally supported a fewer number of DBM larvae and natural enemies than the amended soils”
Claim · model-written summary
Cabbage on unamended soils generally supported fewer natural enemies than on amended soils.
- Taxon
- CabbageBrassica oleracea var. capitatae0
- Treatment
- soils without amendmente0
- Interactor
- natural enemiese0biocontrol_agent
- Outcome
- natural enemiese0
- Direction
- fewere0
- Comparator
- the amended soilse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Cabbage planted on soils without amendment, generally supported a fewer number of DBM larvae and natural enemies than the amended soils”
Claim · model-written summary
The different treatments had no significant effect on the aphid population.
- Taxon
- white cabbaget0
- Treatment
- the different treatmentse0
- Interactor
- aphidsAphidomorphae0pest
- Outcome
- aphids populatione0
- Direction
- no_changeinferrede0
Not reportedComparator
Verbatim
t0“white cabbage”
e0“The effect of the different treatments on the aphids population was not significant”
Claim · model-written summary
The intercrop had the highest number of beneficial insects.
Not reportedComparator
Verbatim
t0“white cabbage”
e0“The intercrop had the highest number of beneficial insects”
Claim · model-written summary
Soil amendment had a significant effect on cabbage yield.
- Taxon
- cabbageBrassica oleracea var. capitatae0
- Treatment
- soil amendmente0
- Outcome
- yielde0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The effect of soil amendment on the yield of cabbage and onion was significant with poultry manure plots recording the highest yield”
Claim · model-written summary
Soil amendment had a significant effect on onion yield.
- Taxon
- onion
Allium cepae0 - Treatment
- soil amendmente0
- Outcome
- yielde0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The effect of soil amendment on the yield of cabbage and onion was significant with poultry manure plots recording the highest yield”
Claim · model-written summary
Poultry manure plots recorded the highest yield of cabbage and onion.
- Taxon
- cabbage and onionBrassica oleracea var. capitataAllium cepae0
- Treatment
- poultry manure plotse0
- Outcome
- yielde0
- Direction
- higheste0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The effect of soil amendment on the yield of cabbage and onion was significant with poultry manure plots recording the highest yield”
Claim · model-written summary
Cropping system significantly affected onion yield, with sole onion yielding more than onion intercropped with cabbage.
- Taxon
- onionAllium cepae0
- Treatment
- sole onione0
- Outcome
- yieldse0
- Direction
- highere0
- Comparator
- onion intercropped with cabbagee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The effect of cropping system was also significant on the yield of onion, with sole onion obtaining higher yields than onion intercropped with cabbage”
Claim · model-written summary
Soil amendment significantly improved soil chemical and physical properties.
- Taxon
- white cabbaget0
- Treatment
- soil amendmente0
- Outcome
- soil chemical and physical propertiese0
- Direction
- improvede0
Not reportedComparator
Verbatim
t0“white cabbage”
e0“The use of soil amendment also significantly improved the soil chemical and physical properties”
Claim · model-written summary
The authors conclude that intercropping and soil amendment have considerable potential in sustainable vegetable production.
Verbatim
e0“Intercropping and soil amendment, therefore, have a lot of potential in sustainable vegetable production”
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