Abstract
The effects of an entomopathogenic nematode, Steinernema carpocapsae (Weiser), and an experimental systemic aphicide, RH-7988, on edaphic populations of the woolly apple aphid, Eriosoma lanigerum (Hausmann), were investigated. Laboratory experiments showed that presence of the nematode in a culture of woolly apple aphids increased the mortality rate. Nematodes were found inside the body cavity of several aphids with entry possibly being through the anus via a droplet of honeydew. Field trials in an unsprayed six-year-old and four-year-old apple orchard tested the efficacy of broadcast spray and topdressing applications, respectively, of nematodes at a rate of 376,600 nematodes/m2. The broadcast spray trees had fewer aphid colonies on roots than the untreated controls (P = 0.10), but the topdressing treatment had no effect. The systemic aphicide, RH-7988, was tested in a two-year-old apple orchard. Two rates of foliar and soil application were tested, with all treatments significantly reducing arboreal woolly apple aphid populations. Edaphic populations were also significantly reduced one month after treatment, but no difference was found four months after treatment. Both control methods show promise as potential management options for edaphic woolly apple aphid populations.
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Claims 8
Claim · model-written summary
Nematodes increased woolly apple aphid mortality in laboratory culture.
- Taxon
- Apple
Malus domesticat0 - Treatment
- presence of the nematodee0
- Interactor
- woolly apple aphids
Eriosoma lanigerume0pest - Second interactor
- Steinernema carpocapsae
Steinernema carpocapsaet1biocontrol_agent
- Outcome
- woolly apple aphids increased the mortality ratee0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“presence of the nematode in a culture of woolly apple aphids increased the mortality rate.”
t0“Apple”
t1“Steinernema carpocapsae”
Claim · model-written summary
Nematodes were found within aphid body cavities.
- Taxon
- AppleMalus domesticat0
- Interactor
- aphidsAphidomorphae0pest
- Second interactor
- Steinernema carpocapsae
- Outcome
- Nematodes were found inside the body cavity of several aphidse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Nematodes were found inside the body cavity of several aphids with entry possibly being through the anus via a droplet of honeydew.”
t0“Apple”
t1“Steinernema carpocapsae”
Claim · model-written summary
Nematode broadcast spray reduced root aphid colonies versus untreated controls.
- Taxon
- AppleMalus domesticat0
- Treatment
- broadcast spraye0
- Interactor
- aphide0pest
- Second interactor
- Steinernema carpocapsae
- Outcome
- aphid colonies on rootse0
- Direction
- fewere0
- Comparator
- untreated controlse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The broadcast spray trees had fewer aphid colonies on roots than the untreated controls (P = 0.10), but the topdressing treatment had no effect.”
t0“Apple”
t1“Steinernema carpocapsae”
Claim · model-written summary
Nematode topdressing had no effect.
- Taxon
- AppleMalus domesticat0
- Treatment
- topdressing treatmente0
- Interactor
- woolly apple aphidEriosoma lanigerume1pest
- Outcome
- no effecte0
- Direction
- no effecte0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the topdressing treatment had no effect.”
t0“Apple”
e1“woolly apple aphid, Eriosoma lanigerum (Hausmann)”
Claim · model-written summary
All RH-7988 treatments significantly reduced arboreal woolly apple aphids.
- Taxon
- AppleMalus domesticat0
- Treatment
- foliar and soil applicatione0
- Interactor
- woolly apple aphidEriosoma lanigerume0pest
- Outcome
- arboreal woolly apple aphid populationse0
- Direction
- reducinge0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Two rates of foliar and soil application were tested, with all treatments significantly reducing arboreal woolly apple aphid populations.”
t0“Apple”
Claim · model-written summary
RH-7988 significantly reduced edaphic aphids at one month.
- Taxon
- AppleMalus domesticat0
- Treatment
- RH-7988e2
- Interactor
- woolly apple aphidEriosoma lanigerume1pest
- Outcome
- Edaphic populationse0
- Direction
- reducede0
- Qualifier
- one month after treatmente0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Edaphic populations were also significantly reduced one month after treatment”
t0“Apple”
e1“woolly apple aphid, Eriosoma lanigerum (Hausmann)”
e2“The systemic aphicide, RH-7988, was tested in a two-year-old apple orchard.”
Claim · model-written summary
RH-7988 showed no difference in edaphic aphids after four months.
- Taxon
- AppleMalus domesticat0
- Treatment
- RH-7988e2
- Interactor
- woolly apple aphidEriosoma lanigerume1pest
- Outcome
- no differencee0
- Direction
- no differencee0
- Qualifier
- four months after treatmente0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“no difference was found four months after treatment.”
t0“Apple”
e1“woolly apple aphid, Eriosoma lanigerum (Hausmann)”
e2“The systemic aphicide, RH-7988, was tested in a two-year-old apple orchard.”
Claim · model-written summary
The authors regard both control methods as promising for edaphic aphids.
- Taxon
- AppleMalus domesticat0
- Interactor
- woolly apple aphidEriosoma lanigerume0pest
- Outcome
- potential management options for edaphic woolly apple aphid populationse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Both control methods show promise as potential management options for edaphic woolly apple aphid populations.”
t0“Apple”
The same questions in other papers
application · pest · Malus domestica (apple)Positive and negative results
29 papers in the same direction as this paper · 10 in the opposite direction · 1 reporting no difference from an alternative
- no effect
- negative
- negative
37 papers more in this group
See all 41 papers →application · Eriosoma lanigerum · Malus domestica (apple)Results agree
3 papers in the same direction as this paper
- positive
- positive
- 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.