Abstract
Intercropping as a method to reduce crop losses is an old technique, especially in the tropics. During 1977 and 1978 intercropping experiments of Brussels sprouts with Spergula arvensis showed a significant pest reducing effect. Mamestra brassicae and Evergestis forficalis populations showed a strong reduction, whereas Pieris rapae did not seem to respond to intercropping. Late cabbage root fly infestation of the sprout buttons was reduced drastically. Brevicoryne brassicae incidence was decreased in dense intercropping plots only. Injury due to caterpillar feeding showed a grading response to intercropping density, as did the total caterpillar populations. Log dose − effect regression lines allow a comparison of various intercropping densities with other control methods on insect pest population reducing potential. ZUSAMMENFASSUNG WIRKUNGEN VON ZWISCHENKULTUREN MIT SPERGULA ARVENSIS AUF SCHÄDLINGEN VON ROSENKOHL Durch Untersaaten können Ertragsverluste an Kulturpflanzen reduziert werden. Das ist ein altes, bewährtes Verfahren, besonders in den Tropen. Die Einsaat von Spergula arvensis in Rosenkohlbeständen führte in 2‐jährigen Untersuchungen zur signifikanten Verringerung des Schädlingsbefalls. Während die Populationen von Mamestra brassicae und Evergestis forficalis stark zurückgingen, blieb die von Pieris rapae unbeeinflusst. Eine Abnahme von Brevicoryne brassicae konnte nur in Parzellen mit hohen Spergula ‐Dichten festgestellt werden. Die Abundanz der Raupen sowie die Beschädigungsintensität durch diese, zeigten eine Abhängigkeit von der Untersaatdichte. Die Regressionsgerade Untersaatdichte zur Effektivität erlaubt einen Vergleich verschiedener Spergula ‐Dichten mit anderen Methoden, die das Schädlingspotential reduzieren.
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Claims 9
Claim · model-written summary
Spergula arvensis intercropping significantly reduced pest incidence in Brussels sprouts.
- Taxon
- Brussels sprouts
Brassica oleracea var. gemmiferae0 - Treatment
- intercropping experiments of Brussels sprouts with Spergula arvensise0
- Interactor
- Spergula arvensis
Spergula arvensise0weed - Outcome
- pest reducing effecte0
- Direction
- reducinge0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“intercropping experiments of Brussels sprouts with Spergula arvensis showed a significant pest reducing effect.”
Claim · model-written summary
Mamestra brassicae populations were strongly reduced by intercropping.
- Taxon
- BRUSSELS SPROUTSBrassica oleracea var. gemmiferat0
- Treatment
- INTERCROPPINGt1
- Interactor
- Mamestra brassicae
_-_(imago)%2C_Arnhem%2C_the_Netherlands_-_2.jpg?width=60)
Mamestra brassicaee0pest - Outcome
- populationse0
- Direction
- reductione0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
_-_(imago)%2C_Arnhem%2C_the_Netherlands_-_2.jpg?width=500)
Verbatim
e0“Mamestra brassicae and Evergestis forficalis populations showed a strong reduction”
t0“BRUSSELS SPROUTS”
t1“INTERCROPPING WITH SPERGULA ARVENSIS”
Claim · model-written summary
Evergestis forficalis populations were strongly reduced by intercropping.
- Taxon
- BRUSSELS SPROUTSBrassica oleracea var. gemmiferat0
- Treatment
- INTERCROPPINGt1
- Interactor
- Evergestis forficalis
Evergestis forficalise0pest - Outcome
- Evergestis forficalis populationse0
- Direction
- reductione0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Mamestra brassicae and Evergestis forficalis populations showed a strong reduction”
t0“BRUSSELS SPROUTS”
t1“INTERCROPPING WITH SPERGULA ARVENSIS”
Claim · model-written summary
Pieris rapae did not appear to respond to intercropping.
- Taxon
- BRUSSELS SPROUTSBrassica oleracea var. gemmiferat0
- Treatment
- intercroppinge0
- Interactor
- Pieris rapae
Pieris rapaee0pest - Outcome
- Pieris rapaee0
- Direction
- did not seem to responde0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Pieris rapae did not seem to respond to intercropping.”
t0“BRUSSELS SPROUTS”
Claim · model-written summary
Late cabbage root fly infestation of sprout buttons was drastically reduced.
- Taxon
- BRUSSELS SPROUTSBrassica oleracea var. gemmiferat0
- Treatment
- INTERCROPPING WITH SPERGULA ARVENSISt1
- Interactor
- cabbage root fly
Delia radicume0pest - Outcome
- Late cabbage root fly infestation of the sprout buttonse0
- Direction
- reduced drasticallye0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Late cabbage root fly infestation of the sprout buttons was reduced drastically.”
t0“BRUSSELS SPROUTS”
t1“INTERCROPPING WITH SPERGULA ARVENSIS”
Claim · model-written summary
Brevicoryne brassicae incidence decreased only in dense intercropping plots.
- Taxon
- BRUSSELS SPROUTSBrassica oleracea var. gemmiferat0
- Treatment
- dense intercropping plotse0
- Interactor
- Brevicoryne brassicae
.jpg?width=60)
Brevicoryne brassicaee0pest - Outcome
- Brevicoryne brassicae incidencee0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
.jpg?width=500)
Verbatim
e0“Brevicoryne brassicae incidence was decreased in dense intercropping plots only.”
t0“BRUSSELS SPROUTS”
Claim · model-written summary
Caterpillar feeding injury varied with intercropping density.
- Taxon
- BRUSSELS SPROUTSBrassica oleracea var. gemmiferat0
- Treatment
- intercropping densitye0
- Interactor
- caterpillare0pest
- Outcome
- Injury due to caterpillar feedinge0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Injury due to caterpillar feeding showed a grading response to intercropping density”
t0“BRUSSELS SPROUTS”
Claim · model-written summary
Total caterpillar populations varied with intercropping density.
- Taxon
- BRUSSELS SPROUTSBrassica oleracea var. gemmiferat0
- Treatment
- intercropping densitye1
- Interactor
- caterpillare0pest
- Outcome
- total caterpillar populationse0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“as did the total caterpillar populations.”
e1“Injury due to caterpillar feeding showed a grading response to intercropping density”
t0“BRUSSELS SPROUTS”
Claim · model-written summary
Log dose effect regression lines enabled comparisons of intercropping densities with other control methods for pest reduction.
- Taxon
- BRUSSELS SPROUTSBrassica oleracea var. gemmiferat0
- Treatment
- various intercropping densitiese0
- Outcome
- insect pest population reducing potentiale0
- Comparator
- other control methodse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Log dose − effect regression lines allow a comparison of various intercropping densities with other control methods on insect pest population reducing potential.”
t0“BRUSSELS SPROUTS”
The same questions in other papers
intercropping · Pieris rapae · Brassica oleracea (wild cabbage)Positive and negative results
1 paper in the same direction as this paper · 1 in the opposite direction
- positive
- no effect
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.