Abstract
The effects of intercropping via competition on crop biomass, pest [cabbage aphid Brevicoryne brassicae (L.)] abundance and natural enemy [the parasitoid Diaeretiella rapae (M’Intosh)] efficacy were studied in the Brassica oleracea L. var. italica system. From May to December 2004, insect populations and yield parameters were monitored in summer and fall in broccoli monoculture and polyculture systems with or without competition from Brassica spp. (mustard), or Fagopyrum esculentum Moench (buckwheat), and with addition of organic (compost) or synthetic fertilizer. 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. fall). In compost-fertilized broccoli, increased seasonal parasitization rates of B. brassicae by D. rapae were observed along with the expected lower aphid pressure, when compared to synthetically-fertilized plants.
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Claims 5
Claim · model-written summary
Buckwheat and mustard competition did not influence pest density on broccoli.
- Taxon
- broccoli
Brassica oleracea var. italicat0 - Treatment
- buckwheat and mustard intercropse0
- Interactor
- cabbage aphid
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Brevicoryne brassicaee1pest - 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
t0“broccoli”
e0“Competition from buckwheat and mustard intercrops did not influence pest density on broccoli”
e1“pest [cabbage aphid Brevicoryne brassicae (L.)] abundance”
Claim · model-written summary
Intercropping reduced cabbage aphid pressure, varying by plant and season.
- Taxon
- broccoliBrassica oleracea var. italicat0
- Treatment
- intercropping treatmentse0
- Interactor
- cabbage aphidBrevicoryne brassicaee1pest
- Outcome
- aphid pressuree0
- Direction
- decreasede0
- Qualifier
- varied with the intercropped plant and season (summer vs. fall)e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“broccoli”
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. fall)”
e1“pest [cabbage aphid Brevicoryne brassicae (L.)] abundance”
Claim · model-written summary
Intercropping enhanced natural enemies of cabbage aphid, varying by plant and season.
- Taxon
- broccoliBrassica oleracea var. italicat0
- Treatment
- intercropping treatmentse0
- Interactor
- cabbage aphidBrevicoryne brassicaee1pest
- Outcome
- natural enemies of cabbage aphide0
- Direction
- enhancede0
- Qualifier
- varied with the intercropped plant and season (summer vs. fall)e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“broccoli”
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. fall)”
e1“pest [cabbage aphid Brevicoryne brassicae (L.)] abundance”
Claim · model-written summary
Compost fertilization increased seasonal parasitization of cabbage aphids by D. rapae relative to synthetic fertilizer.
- Taxon
- broccoliBrassica oleracea var. italicat0
- Treatment
- compost-fertilizede0
- Interactor
- B. brassicaeBrevicoryne brassicaee0pest
- Second interactor
- D. rapae
Diaeretiella rapaee0biocontrol_agent - Outcome
- parasitization rates of B. brassicae by D. rapaee0
- Direction
- increasede0
- Comparator
- synthetically-fertilized plantse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“broccoli”
e0“In compost-fertilized broccoli, increased seasonal parasitization rates of B. brassicae by D. rapae were observed along with the expected lower aphid pressure, when compared to synthetically-fertilized plants.”
Claim · model-written summary
Compost fertilization lowered aphid pressure relative to synthetic fertilizer.
- Taxon
- broccoliBrassica oleracea var. italicat0
- 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
t0“broccoli”
e0“In compost-fertilized broccoli, increased seasonal parasitization rates of B. brassicae by D. rapae were observed along with the expected lower aphid pressure, when compared to 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
- positive
- negative
- 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.