Paper · 2012 · Sustainable Agriculture Research

Onion as a Pest Control Intercrop in Organic Cabbage (Brassica oleracea) Production System in Ghana

P. K. Baidoo; M. B. Mochiah; K. Apusiga

5
claims
15
verbatim quotes
41
citations
2
research areas
✓
Open access · cc-by

Abstract

The use of chemical insecticides in the control of insect pests has left in its wake resistance of some pests to some of the conventional insecticides. Alternative methods of managing pests such as cultural control have to be employed to reduce pest infestation of crops. Onion was used in an intercrop as a non host crop to manage the pests of cabbage. The experiment was conducted in a Randomized Complete Block Design with four treatments; sole cabbage (T1), 2 rows of cabbage to 1 row of onion (T2), 3 rows of cabbage to 1 row of onion (T3) and 4 rows of cabbage to 1 row of onion (T4), each of which was replicated three times. Data were collected on pests’ numbers, plant height, damaged leaves at harvest, canopy spread, number of damaged heads and fresh weight. Significantly fewer Bemisia tabaci, Hellula undalis and Brevicoryne brassicae infested the intercropped plants than the sole crop. However, intercropping cabbage with onion did not significantly reduce Plutella xylostella population on cabbage. Number of damaged heads, fresh weight and damaged leaves were significantly different (P< 0.05).

Abstract from the paper’s OpenAlex record; open copy licensed cc-by. Read at the source ↗

The text the model read, with the source record’s inline markup (italics, sub- and superscripts) rendered and its character entities decoded; quote offsets refer to the raw text.

Claims 5

Intervention effectobservedoriginal resultpositivesignificant (as stated)measured

Claim · model-written summary

Onion intercropping gave fewer Bemisia tabaci infesting cabbage than sole cabbage.

Treatment
Onion was used in an intercrope1
Interactor
Bemisia tabaciBemisia tabacie2pest
Outcome
infestede2
Direction
fewere2
Comparator
sole crope2
Setting
Ghanat0

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Brassica oleracea var. capitata
Brassica oleracea var. capitata · TaxonThamizhpparithi Maari · CC BY-SA 4.0 · Wikimedia Commons ↗
Bemisia tabaci
Bemisia tabaci · InteractorPublic domain · Wikimedia Commons ↗

Verbatim

e1

“Onion was used in an intercrop as a non host crop to manage the pests of cabbage”

✓ located verbatim in the source · abstract, characters 272–352 · show in text ↑
e2

“Significantly fewer Bemisia tabaci, Hellula undalis and Brevicoryne brassicae infested the intercropped plants than the sole crop”

✓ located verbatim in the source · abstract, characters 770–899 · show in text ↑
t0

“Production System in Ghana”

✓ located verbatim in the source · title, characters 73–99 · show in text ↑
Intervention effectobservedoriginal resultpositivesignificant (as stated)measured

Claim · model-written summary

Onion intercropping gave fewer Hellula undalis infesting cabbage than sole cabbage.

Treatment
Onion was used in an intercrope1
Interactor
Hellula undalisHellula undalise2pest
Outcome
infestede2
Direction
fewere2
Comparator
sole crope2
Setting
Ghanat0

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Brassica oleracea var. capitata
Brassica oleracea var. capitata · TaxonThamizhpparithi Maari · CC BY-SA 4.0 · Wikimedia Commons ↗
Hellula undalis
Hellula undalis · InteractorTonton Bernardo · CC BY-SA 3.0 · Wikimedia Commons ↗

Verbatim

e1

“Onion was used in an intercrop as a non host crop to manage the pests of cabbage”

✓ located verbatim in the source · abstract, characters 272–352 · show in text ↑
e2

“Significantly fewer Bemisia tabaci, Hellula undalis and Brevicoryne brassicae infested the intercropped plants than the sole crop”

✓ located verbatim in the source · abstract, characters 770–899 · show in text ↑
t0

“Production System in Ghana”

✓ located verbatim in the source · title, characters 73–99 · show in text ↑
Intervention effectobservedoriginal resultpositivesignificant (as stated)measured

Claim · model-written summary

Onion intercropping gave fewer Brevicoryne brassicae infesting cabbage than sole cabbage.

Treatment
Onion was used in an intercrope1
Interactor
Brevicoryne brassicaeBrevicoryne brassicaee2pest
Outcome
infestede2
Direction
fewere2
Comparator
sole crope2
Setting
Ghanat0

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Brassica oleracea var. capitata
Brassica oleracea var. capitata · TaxonThamizhpparithi Maari · CC BY-SA 4.0 · Wikimedia Commons ↗
Brevicoryne brassicae
Brevicoryne brassicae · InteractorRasbak · CC BY-SA 3.0 · Wikimedia Commons ↗

Verbatim

e1

“Onion was used in an intercrop as a non host crop to manage the pests of cabbage”

✓ located verbatim in the source · abstract, characters 272–352 · show in text ↑
e2

“Significantly fewer Bemisia tabaci, Hellula undalis and Brevicoryne brassicae infested the intercropped plants than the sole crop”

✓ located verbatim in the source · abstract, characters 770–899 · show in text ↑
t0

“Production System in Ghana”

✓ located verbatim in the source · title, characters 73–99 · show in text ↑
Intervention effectobservedoriginal resultno effectnot significant (as stated)measured

Claim · model-written summary

Onion intercropping did not significantly reduce the Plutella xylostella population on cabbage.

Treatment
intercropping cabbage with onione3
Interactor
Plutella xylostellaPlutella xylostellae3pest
Outcome
Plutella xylostella populatione3
Direction
did not significantly reducee3
Setting
Ghanat0

Not reportedComparator

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Brassica oleracea var. capitata
Brassica oleracea var. capitata · TaxonThamizhpparithi Maari · CC BY-SA 4.0 · Wikimedia Commons ↗
Plutella xylostella
Plutella xylostella · InteractorPlease report references to olei@despammed.com . · CC BY-SA 2.5 · Wikimedia Commons ↗

Verbatim

e1

“Onion was used in an intercrop as a non host crop to manage the pests of cabbage”

✓ located verbatim in the source · abstract, characters 272–352 · show in text ↑
e3

“intercropping cabbage with onion did not significantly reduce Plutella xylostella population on cabbage”

✓ located verbatim in the source · abstract, characters 910–1013 · show in text ↑
t0

“Production System in Ghana”

✓ located verbatim in the source · title, characters 73–99 · show in text ↑
Intervention effectobservedoriginal resultsignificant (as stated)measured

Claim · model-written summary

Onion intercropping gave significantly different numbers of damaged heads, fresh weight and damaged leaves compared with sole cabbage.

Treatment
Onion was used in an intercrope1
Outcome
Number of damaged heads, fresh weight and damaged leavese4
Comparator
sole crope2

Not reportedDirection

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Brassica oleracea var. capitata
Brassica oleracea var. capitata · TaxonThamizhpparithi Maari · CC BY-SA 4.0 · Wikimedia Commons ↗

Verbatim

e1

“Onion was used in an intercrop as a non host crop to manage the pests of cabbage”

✓ located verbatim in the source · abstract, characters 272–352 · show in text ↑
e2

“Significantly fewer Bemisia tabaci, Hellula undalis and Brevicoryne brassicae infested the intercropped plants than the sole crop”

✓ located verbatim in the source · abstract, characters 770–899 · show in text ↑
e4

“Number of damaged heads, fresh weight and damaged leaves were significantly different (P< 0.05)”

✓ located verbatim in the source · abstract, characters 1015–1110 · show in text ↑

Allium cepa · Plutella xylostella · Brassica oleracea (wild cabbage)Positive and negative results

4 papers: 3 positive, 1 negative or no effect

3 in the opposite direction

  1. positive
  2. positive
  3. positive
See all 4 papers →

Brassica oleracea var. capitata · Plutella xylostella · Brassica oleracea (wild cabbage)Positive and negative results

6 papers: 4 positive, 2 negative or no effect

1 paper in the same direction as this paper · 4 in the opposite direction

  1. positive
  2. positive
  3. positive

2 papers more in this group

See all 6 papers →

intercropping · Plutella xylostella · Brassica oleracea (wild cabbage)Positive and negative results

10 papers: 8 positive, 2 negative or no effect

1 paper in the same direction as this paper · 8 in the opposite direction

  1. positive
  2. positive
  3. positive

6 papers more in this group

See all 10 papers →

intercropping · Brevicoryne brassicae · Brassica oleracea (wild cabbage)Results agree

7 papers: 7 positive, 0 negative or no effect

6 papers in the same direction as this paper

  1. positive
  2. positive
  3. positive

3 papers more in this group

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.