Abstract
The mortality effects of crofton weed (Ageratina adenophora, (Asteraceae)) acetone extract and biogas fermentation residue on the cabbage aphid Brevicoryne brassicae, and the risk posed to its parasitoid Diaeretiella rapae, were studied. Laboratory trials demonstrated the insecticidal activity of both substances, and this was confirmed by field experiments in which reductions of 73 and 71% aphid populations were recorded 3 days after treatment for the acetone extract and the biogas fermentation residue, respectively. The results of a laboratory contact toxicity test on inert substrates for parasitoid adults, and calculation of the Hazard Quotient (HQ) ratio, indicate a low risk for D. rapae, with HQ being consistently below the trigger value of 2.
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Claims 5
Claim · model-written summary
Crofton weed acetone extract had insecticidal activity against the cabbage aphid in laboratory trials.
- Taxon
- cabbage
Brassica oleracea var. capitatat0 - Treatment
- crofton weed (Ageratina adenophora, (Asteraceae)) acetone extracte1
- Interactor
- Brevicoryne brassicae
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Brevicoryne brassicaee1pest - Outcome
- insecticidal activitye0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
.jpg?width=500)
Verbatim
e0“Laboratory trials demonstrated the insecticidal activity of both substances”
e1“crofton weed (Ageratina adenophora, (Asteraceae)) acetone extract and biogas fermentation residue on the cabbage aphid Brevicoryne brassicae”
t0“cabbage aphid”
Claim · model-written summary
Biogas fermentation residue had insecticidal activity against cabbage aphids in laboratory trials.
- Taxon
- cabbageBrassica oleracea var. capitatat0
- Treatment
- biogas fermentation residuee1
- Interactor
- Brevicoryne brassicaeBrevicoryne brassicaee1pest
- Outcome
- insecticidal activitye0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Laboratory trials demonstrated the insecticidal activity of both substances”
e1“biogas fermentation residue on the cabbage aphid Brevicoryne brassicae”
t0“cabbage aphid”
Claim · model-written summary
Acetone extract reduced field aphid populations by 73% after 3 days.
- Taxon
- cabbageBrassica oleracea var. capitatat0
- Treatment
- acetone extracte0
- Interactor
- Brevicoryne brassicaeBrevicoryne brassicaee1pest
- Outcome
- aphid populationse0
- Direction
- reductionse0
- Value
- 73e0
- Qualifier
- 3 days after treatmente0
Not reportedComparatorSetting
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“reductions of 73 and 71% aphid populations were recorded 3 days after treatment for the acetone extract and the biogas fermentation residue, respectively”
e1“cabbage aphid Brevicoryne brassicae”
t0“cabbage aphid”
Claim · model-written summary
Biogas fermentation residue reduced field aphid populations by 71% after 3 days.
- Taxon
- cabbageBrassica oleracea var. capitatat0
- Treatment
- biogas fermentation residuee0
- Interactor
- Brevicoryne brassicaeBrevicoryne brassicaee1pest
- Outcome
- aphid populationse0
- Direction
- reductionse0
- Value
- 71%e0
- Qualifier
- 3 days after treatmente0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“reductions of 73 and 71% aphid populations were recorded 3 days after treatment for the acetone extract and the biogas fermentation residue, respectively”
e1“cabbage aphid Brevicoryne brassicae”
t0“cabbage aphid”
Claim · model-written summary
The tested substances posed low risk to the aphid parasitoid, with hazard quotient below 2.
- Taxon
- cabbageBrassica oleracea var. capitatat0
- Interactor
- D. rapae
Diaeretiella rapaee0parasite - Outcome
- low risk for D. rapaee0
- Value
- below the trigger value of 2e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“indicate a low risk for D. rapae, with HQ being consistently below the trigger value of 2”
t0“cabbage aphid”
The same questions in other papers
botanical · Brevicoryne brassicae · Brassica oleracea (wild cabbage)Results agree
13 papers in the same direction as this paper
- positive
- positive
- positive
10 papers more in this group
See all 14 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.