Abstract
Ovipositional preference and larval survival of the diamondback moth, Plutella xylostella (L.), were compared among cabbage, Brassica oleracea L. variety capitata; glossy collards, Brassica oleracea L. variety acephala; and yellow rocket, Barbarea vulgaris (R. Br.) variety arcuata in different treatments of planting density, host plant age, intercropping, and water stress in 2003 and 2004. P. xylostella laid nearly twice as many eggs per plant in the high planting densities of glossy collards and yellow rocket than in the standard planting densities. Ovipositional preference was positively correlated with plant age in cabbage, glossy collards, and yellow rocket. Larval survival on cabbage was 1.9 times higher on 6-wk than on 12-wk-old plants, whereas larval survival on collards was 12.1 times higher on the younger plants. No larvae survived on either 6- or 12-wk-old yellow rocket plants. Intercropping cabbage with either tomato, Lycopersicon esculentum Mill., or fava bean, Vicia fava L., did not reduce the number of eggs laid on cabbage. No significant differences in oviposition were found between water-stressed and well-irrigated host plants treatments. Yet, P. xylostella larval survival on water-stressed cabbage was 2.1 times lower than on well-irrigated cabbage plants. Based on our findings, the effectiveness of trap crops of glossy collards and yellow rocket could be enhanced by integrating the use of higher planting densities in the trap crop than in the main crop and seeding of the trap crop earlier than the main crop.
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Claims 14
Claim · model-written summary
Higher density of glossy collards nearly doubled eggs per plant.
Verbatim
e0“P. xylostella laid nearly twice as many eggs per plant in the high planting densities of glossy collards and yellow rocket than in the standard planting densities”
Claim · model-written summary
Higher density of yellow rocket nearly doubled eggs per plant.
- Taxon
- yellow rocket
_Barbarea_vulgaris_-_Habit.jpg?width=60)
Barbarea vulgarise0 - Treatment
- high planting densitiese0
- Interactor
- P. xylostellae0pest
- Outcome
- eggs per plante0
- Direction
- twice as manye0
- Value
- nearly twicee0
- Comparator
- standard planting densitiese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
_Barbarea_vulgaris_-_Habit.jpg?width=500)
Verbatim
e0“P. xylostella laid nearly twice as many eggs per plant in the high planting densities of glossy collards and yellow rocket than in the standard planting densities”
Claim · model-written summary
Oviposition preference rose with cabbage age.
- Taxon
- cabbage
Brassica oleracea var. capitatae0 - Organ / stage
- plant agee0
- Outcome
- Ovipositional preferencee0
- Direction
- positively correlatede0
Not reportedInteractor
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Ovipositional preference was positively correlated with plant age in cabbage, glossy collards, and yellow rocket”
Claim · model-written summary
Oviposition preference rose with glossy collards age.
Verbatim
e0“Ovipositional preference was positively correlated with plant age in cabbage, glossy collards, and yellow rocket”
Claim · model-written summary
Oviposition preference rose with yellow rocket age.
- Taxon
- yellow rocketBarbarea vulgarise0
- Organ / stage
- plant agee0
- Outcome
- Ovipositional preferencee0
- Direction
- positively correlatede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Ovipositional preference was positively correlated with plant age in cabbage, glossy collards, and yellow rocket”
Claim · model-written summary
Larval survival on cabbage was 1.9 times higher at six than twelve weeks.
- Taxon
- cabbageBrassica oleracea var. capitatae0
- Organ / stage
- 6-wke0
- Outcome
- Larval survivale0
- Direction
- highere0
- Value
- 1.9 timese0
- Comparator
- 12-wk-old plantse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Larval survival on cabbage was 1.9 times higher on 6-wk than on 12-wk-old plants”
Claim · model-written summary
Larval survival on collards was 12.1 times higher on younger plants.
- Taxon
- collards
Brassica oleracea var. viridise0 - Organ / stage
- younger plantse0
- Outcome
- larval survivale0
- Direction
- highere0
- Value
- 12.1 timese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“larval survival on collards was 12.1 times higher on the younger plants”
Claim · model-written summary
No larvae survived on yellow rocket at either tested age.
- Taxon
- yellow rocketBarbarea vulgarise0
- Organ / stage
- 6- or 12-wk-olde0
- Outcome
- No larvae survivede0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“No larvae survived on either 6- or 12-wk-old yellow rocket plants”
Claim · model-written summary
Intercropping with tomato did not reduce eggs on cabbage.
- Taxon
- cabbageBrassica oleracea var. capitatae0
- Treatment
- tomatoe0
- Outcome
- number of eggs laid on cabbagee0
- Direction
- did not reducee0
Not reportedInteractorComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Intercropping cabbage with either tomato, Lycopersicon esculentum Mill., or fava bean, Vicia fava L., did not reduce the number of eggs laid on cabbage”
Claim · model-written summary
Intercropping with fava bean did not reduce eggs on cabbage.
- Taxon
- cabbageBrassica oleracea var. capitatae0
- Treatment
- fava beane0
- Outcome
- number of eggs laid on cabbagee0
- Direction
- did not reducee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Intercropping cabbage with either tomato, Lycopersicon esculentum Mill., or fava bean, Vicia fava L., did not reduce the number of eggs laid on cabbage”
Claim · model-written summary
Water stress produced no significant oviposition difference.
- Treatment
- water-stressede0
- Outcome
- ovipositione0
- Direction
- No significant differencese0
- Comparator
- well-irrigatede0
Not reportedTaxon
Verbatim
e0“No significant differences in oviposition were found between water-stressed and well-irrigated host plants treatments”
Claim · model-written summary
Larval survival on water-stressed cabbage was 2.1 times lower.
- Taxon
- cabbageBrassica oleracea var. capitatae0
- Treatment
- water-stressede0
- Interactor
- P. xylostellae0pest
- Outcome
- P. xylostella larval survivale0
- Direction
- lowere0
- Value
- 2.1 timese0
- Comparator
- well-irrigated cabbage plantse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“P. xylostella larval survival on water-stressed cabbage was 2.1 times lower than on well-irrigated cabbage plants”
Claim · model-written summary
The authors recommend higher trap-crop density and earlier seeding for glossy collards.
Verbatim
e0“effectiveness of trap crops of glossy collards and yellow rocket could be enhanced by integrating the use of higher planting densities in the trap crop than in the main crop and seeding of the trap crop earlier than the main crop”
Claim · model-written summary
The authors recommend higher trap-crop density and earlier seeding for yellow rocket.
- Taxon
- yellow rocketBarbarea vulgarise0
- Outcome
- higher planting densities in the trap crop than in the main crop and seeding of the trap crop earlier than the main crope0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“effectiveness of trap crops of glossy collards and yellow rocket could be enhanced by integrating the use of higher planting densities in the trap crop than in the main crop and seeding of the trap crop earlier than the main crop”
The same questions in other papers
Solanum lycopersicum · pest · Brassica oleracea (wild cabbage)Positive and negative results
3 in the opposite direction
- positive
- positive
- positive
drought · survival · Brassica oleracea (wild cabbage)Results agree
1 paper in the same direction as this paper
- positive
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.