Paper · 2012 · Acta Agriculturae Scandinavica Section B - Soil & Plant Science

Suitability ofBrassica oleracealeaves in managingMeloidogyne incognitathrough the ground leaching technology system under microplot conditions

Phatu Mashela; Kgabo Pofu; Bombiti Nzanza

5
claims
10
verbatim quotes
7
citations
2
research areas
✓
Open access

Abstract

Abstract The ground leaching technology (GLT) system was introduced in low-input farming systems in response to the withdrawal of methyl bromide from agrochemical markets and the amelioration of conventional organic amendment drawbacks in managing plant-parasitic nematodes in olericulture. The primary indicator for success in GLT system is that potent nematicidal chemicals be released through leaching by water, while in conventional organic amendments potent chemicals are released through microbial degradation. Due to widespread availability of cabbage (Brassica oleracea) leaves in local markets as a waste, the material would be readily available for use in GLT systems in peri-urban agriculture. The objective of the study was to determine whether crude extracts of B. oleracea leaves were suitable for use in GLT system for managing the root-knot (Meloidogyne spp.) nematodes and improving growth of tomato (Solanum lycorpersicum). A 2×2×2 factorial experiment, with the main factors being Bacillus species, crude extracts of B. oleracea leaves and Meloidogyne incognita, was conducted over two seasons under microplot conditions. At harvest, Bacillus×Brassica×nematode interaction reduced final nematode population densities, fresh fruit yield, dry shoot mass, plant height and stem diameter, while Bacillus× Brassica interaction increased tomato growth variables. Incidentally, Brassica alone reduced the productivity of tomato. Overall, the efficacy of crude extracts of B. oleracea leaves in nematode suppression and tomato productivity was dependent upon microbial activities and therefore, the material was not suitable for use in GLT systems.

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Claims 5

Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

The three-factor interaction reduced final nematode densities.

Treatment
Bacillus×Brassica×nematode interactione0
Outcome
final nematode population densitiese0
Direction
reducede0

Not reportedInteractorComparator

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

Solanum lycopersicum
Solanum lycopersicum · TaxonKod B · CC BY-SA 4.0 · Wikimedia Commons ↗

Verbatim

e0

“At harvest, Bacillus×Brassica×nematode interaction reduced final nematode population densities, fresh fruit yield, dry shoot mass, plant height and stem diameter”

✓ located verbatim in the source · abstract, characters 1141–1302 · show in text ↑
t0

“Brassica oleracea”

✓ located verbatim in the source · title, characters 14–31 · show in text ↑
e1

“improving growth of tomato (Solanum lycorpersicum)”

✓ located verbatim in the source · abstract, characters 890–940 · show in text ↑
Intervention effectobservedoriginal resultnegativemeasured

Claim · model-written summary

The three-factor interaction reduced fruit yield, shoot mass, height and stem diameter.

Treatment
Bacillus×Brassica×nematode interactione0
Outcome
fresh fruit yield, dry shoot mass, plant height and stem diametere0
Direction
reducede0

Not reportedComparator

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

Solanum lycopersicum
Solanum lycopersicum · TaxonKod B · CC BY-SA 4.0 · Wikimedia Commons ↗

Verbatim

e0

“At harvest, Bacillus×Brassica×nematode interaction reduced final nematode population densities, fresh fruit yield, dry shoot mass, plant height and stem diameter”

✓ located verbatim in the source · abstract, characters 1141–1302 · show in text ↑
e1

“improving growth of tomato (Solanum lycorpersicum)”

✓ located verbatim in the source · abstract, characters 890–940 · show in text ↑
Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

The Bacillus and Brassica interaction increased tomato growth variables.

Treatment
Bacillus× Brassica interactione0
Outcome
tomato growth variablese0
Direction
increasede0

Not reportedComparator

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

Solanum lycopersicum
Solanum lycopersicum · TaxonKod B · CC BY-SA 4.0 · Wikimedia Commons ↗

Verbatim

e0

“Bacillus× Brassica interaction increased tomato growth variables.”

✓ located verbatim in the source · abstract, characters 1310–1375 · show in text ↑
e1

“improving growth of tomato (Solanum lycorpersicum)”

✓ located verbatim in the source · abstract, characters 890–940 · show in text ↑
Intervention effectobservedoriginal resultnegativemeasured

Claim · model-written summary

Brassica alone reduced tomato productivity.

Treatment
Brassica alonee0
Outcome
productivity of tomatoe0
Direction
reducede0

Not reportedComparator

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

Solanum lycopersicum
Solanum lycopersicum · TaxonKod B · CC BY-SA 4.0 · Wikimedia Commons ↗

Verbatim

e0

“Brassica alone reduced the productivity of tomato.”

✓ located verbatim in the source · abstract, characters 1390–1440 · show in text ↑
Recommendationauthor interpretationoriginal resultbasis n/a

Claim · model-written summary

The authors concluded cabbage extracts were unsuitable for GLT because efficacy depended on microbial activity.

Treatment
crude extracts of B. oleracea leavese0
Outcome
not suitable for use in GLT systemse0

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

Solanum lycopersicum
Solanum lycopersicum · TaxonKod B · CC BY-SA 4.0 · Wikimedia Commons ↗

Verbatim

e0

“Overall, the efficacy of crude extracts of B. oleracea leaves in nematode suppression and tomato productivity was dependent upon microbial activities and therefore, the material was not suitable for use in GLT systems.”

✓ located verbatim in the source · abstract, characters 1441–1659 · show in text ↑
e1

“improving growth of tomato (Solanum lycorpersicum)”

✓ located verbatim in the source · abstract, characters 890–940 · show in text ↑

Brassica · growth · Solanum lycopersicum (tomato)Results agree

2 papers: 2 positive, 0 negative or no effect

1 paper in the same direction as this paper

  1. positive
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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.