Abstract
Abstract 1 The effects of intercropping via competition on crop yields, pest [cabbage aphid Brevicoryne brassicae (L.)] abundance, and natural enemy efficacy were studied in the Brassica oleracea L. var. italica system. 2 From May to December 2004, insect populations and yield parameters were monitored in summer and autumn in broccoli monoculture and polyculture systems with or without competition from Brassica spp. (mustard), or Fagopyrum esculentum Moench (buckwheat), with addition of organic (compost) or synthetic fertilizer. 3 Competition from buckwheat and mustard intercrops did not influence pest density on broccoli; rather, aphid pressure decreased and natural enemies of cabbage aphid were enhanced in intercropping treatments, but this varied with the intercropped plant and season (summer vs. autumn). 4 In compost‐fertilized broccoli systems, seasonal parasitization rates of B. brassicae by Diaeretiella rapae (M’Intosh) increased along with the expected lower aphid pressure compared with synthetically fertilized plants.
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Claims 6
Claim · model-written summary
Competition from buckwheat intercrops did not influence aphid pest density on broccoli.
- Taxon
- broccoli
Brassica oleracea var. italicae0 - Treatment
- buckwheate0
- Interactor
- Brevicoryne brassicae
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Brevicoryne brassicaet0pest - Outcome
- pest density on broccolie0
- Direction
- did not influencee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
.jpg?width=500)
Verbatim
e0“Competition from buckwheat and mustard intercrops did not influence pest density on broccoli”
t0“Effects of crop diversification levels and fertilization regimes on abundance of Brevicoryne brassicae (L.) and its parasitization by Diaeretiella rapae (M’Intosh) in broccoli”
Claim · model-written summary
Competition from mustard intercrops did not influence aphid pest density on broccoli.
- Taxon
- broccoliBrassica oleracea var. italicae0
- Treatment
- mustarde0
- Interactor
- Brevicoryne brassicaeBrevicoryne brassicaet0pest
- Outcome
- pest density on broccolie0
- Direction
- did not influencee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Competition from buckwheat and mustard intercrops did not influence pest density on broccoli”
t0“Effects of crop diversification levels and fertilization regimes on abundance of Brevicoryne brassicae (L.) and its parasitization by Diaeretiella rapae (M’Intosh) in broccoli”
Claim · model-written summary
Intercropping decreased cabbage aphid pressure on broccoli, varying by intercrop and season.
- Taxon
- broccoliBrassica oleracea var. italicat0
- Treatment
- intercropping treatmentse0
- Interactor
- Brevicoryne brassicaeBrevicoryne brassicaet0pest
- Outcome
- aphid pressuree0
- Direction
- decreasede0
- Qualifier
- varied with the intercropped plant and season (summer vs. autumn)e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“aphid pressure decreased and natural enemies of cabbage aphid were enhanced in intercropping treatments, but this varied with the intercropped plant and season (summer vs. autumn)”
t0“Effects of crop diversification levels and fertilization regimes on abundance of Brevicoryne brassicae (L.) and its parasitization by Diaeretiella rapae (M’Intosh) in broccoli”
Claim · model-written summary
Intercropping enhanced natural enemies of cabbage aphid, varying by intercrop and season.
- Taxon
- broccoliBrassica oleracea var. italicat0
- Treatment
- intercropping treatmentse0
- Interactor
- Brevicoryne brassicaeBrevicoryne brassicaet0pest
- Second interactor
- Diaeretiella rapae
Diaeretiella rapaet0biocontrol_agent - Outcome
- natural enemies of cabbage aphide0
- Direction
- enhancede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“aphid pressure decreased and natural enemies of cabbage aphid were enhanced in intercropping treatments, but this varied with the intercropped plant and season (summer vs. autumn)”
t0“Effects of crop diversification levels and fertilization regimes on abundance of Brevicoryne brassicae (L.) and its parasitization by Diaeretiella rapae (M’Intosh) in broccoli”
Claim · model-written summary
Compost fertilization increased seasonal parasitization of cabbage aphid by Diaeretiella rapae compared with synthetic fertilizer.
- Taxon
- broccoliBrassica oleracea var. italicae0
- Treatment
- compost‐fertilizede0
- Interactor
- B. brassicaeBrevicoryne brassicaee0pest
- Second interactor
- Diaeretiella rapaeDiaeretiella rapaee0biocontrol_agent
- Outcome
- seasonal parasitization rates of B. brassicae by Diaeretiella rapaee0
- Direction
- increasede0
- Comparator
- synthetically fertilized plantse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In compost‐fertilized broccoli systems, seasonal parasitization rates of B. brassicae by Diaeretiella rapae (M’Intosh) increased along with the expected lower aphid pressure compared with synthetically fertilized plants.”
Claim · model-written summary
Compost fertilization was associated with lower cabbage aphid pressure than synthetic fertilization.
- Taxon
- broccoliBrassica oleracea var. italicae0
- Treatment
- compost‐fertilizede0
- Interactor
- B. brassicaeBrevicoryne brassicaee0pest
- Outcome
- aphid pressuree0
- Direction
- lowere0
- Comparator
- synthetically fertilized plantse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In compost‐fertilized broccoli systems, seasonal parasitization rates of B. brassicae by Diaeretiella rapae (M’Intosh) increased along with the expected lower aphid pressure compared with synthetically fertilized plants.”
The same questions in other papers
fertilization · Brevicoryne brassicae · Brassica oleracea (wild cabbage)Positive and negative results
3 papers in the same direction as this paper · 4 in the opposite direction
- negative
- positive
- negative
4 papers more in this group
See all 8 papers →intercropping · Brevicoryne brassicae · Brassica oleracea (wild cabbage)Results agree
6 papers in the same direction as this paper
- positive
- positive
- 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.