Abstract
To determine to what extent wild species related to crops might serve as refuges for insect pests and their natural enemies, we compared the performance of the aphid Myzus persicae and its endoparasitoid Diaeretiella rapae on one cultivar of Brassica napus and Brassica oleracea, two wild species Brassica nigra and Sinapis arvensis, and one cultivar of Solanum lycopersicum. These species differ in traits associated with plant defences that may have an impact on the herbivore and its parasitoid. In contrast to our initial hypothesis, aphid population growth rate was significantly smaller on B. napus than on the other Brassicaceae species. Similarly, the performance of the parasitoid was affected by the host plant on which the aphid was feeding. However, aphid and parasitoid performance was not correlated. Thus, in temporally changing landscapes, pests and natural enemies may utilize crops and wild-related host species with contrasting impacts on their fitness.
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Claims 4
Claim · model-written summary
Aphid population growth was significantly smaller on B. napus than on other Brassicaceae species.
- Taxon
- Brassica napus
_Brassica_napus_-_Habit.jpg?width=60)
Brassica napuse2 - Interactor
- Myzus persicae
Myzus persicaee1pest - Outcome
- aphid population growth ratee0
- Direction
- smallere0
- Comparator
- other Brassicaceae speciese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
_Brassica_napus_-_Habit.jpg?width=500)
Verbatim
e0“aphid population growth rate was significantly smaller on B. napus than on the other Brassicaceae species.”
e1“the aphid Myzus persicae”
e2“Brassica napus”
Claim · model-written summary
Parasitoid performance varied with the plant species on which aphids fed.
- Taxon
- Brassica napus and Brassica oleracea, two wild species Brassica nigra and Sinapis arvensisBrassica napus
_leaves.JPG?width=60)
Brassica nigra
Brassica oleracea
Mutarda arvensise3 - Interactor
- Diaeretiella rapae
Diaeretiella rapaee1other - Second interactor
- Myzus persicaeMyzus persicaee2pest
- Outcome
- performance of the parasitoide0
- Qualifier
- host plant on which the aphid was feedinge0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
_leaves.JPG?width=500)
Verbatim
e0“the performance of the parasitoid was affected by the host plant on which the aphid was feeding.”
e1“its endoparasitoid Diaeretiella rapae”
e2“the aphid Myzus persicae”
e3“Brassica napus and Brassica oleracea, two wild species Brassica nigra and Sinapis arvensis”
Claim · model-written summary
Aphid and parasitoid performance were uncorrelated.
- Taxon
- Brassica napusBrassica napuse2
- Interactor
- Myzus persicaeMyzus persicaee1pest
- Second interactor
- Diaeretiella rapaeDiaeretiella rapaee1other
- Outcome
- aphid and parasitoid performancee0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“aphid and parasitoid performance was not correlated.”
e1“the aphid Myzus persicae and its endoparasitoid Diaeretiella rapae”
e2“Brassica napus”
Claim · model-written summary
Crops and wild related host plants may have contrasting fitness effects on pests and natural enemies in changing landscapes.
- Taxon
- Brassica napus and Brassica oleracea, two wild species Brassica nigra and Sinapis arvensisBrassica napusBrassica nigraBrassica oleraceaMutarda arvensise1
- Outcome
- contrasting impacts on their fitnesse0
- Comparator
- wild-related host speciese0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“pests and natural enemies may utilize crops and wild-related host species with contrasting impacts on their fitness.”
e1“Brassica napus and Brassica oleracea, two wild species Brassica nigra and Sinapis arvensis”