Abstract
Summary Potato virus Y (PVY) is transmitted non‐persistently by winged morphs of many aphid species and is a major problem in seed potato production. In order to evaluate the potential of straw mulch applications (4–5 t ha −1 ) and presprouting on PVY reduction, small scale organically managed field experiments were carried out in Northern Hessen, Germany, over 3 yr. In all years mulching significantly reduced aphid infestation on leaves as well as PVY incidence in tubers. For the effect of presprouting the temporal coincidence of two factors was crucial – crop emergence and aphid flight activity. Presprouting decreased PVY incidence when in the phase of early crop emergence aphid spring flight activity was low, but increased it, although not significantly, when prominent aphid flight peaks occurred in this critical period. Straw mulch was most effective when vector pressure was concentrated early in the year acting as a PVY protectant for young plants. In later growth stages its effect declined gradually with increasing ground coverage of the crop. Combined mulching and presprouting had a synergistic, complementary effect on reduction of PVY incidence. In an on‐farm experiment in 2001 scaling up the area mulched stepwise from 100 m 2 to 900 m 2 consistently kept aphid infestation at reduced levels.
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Claims 8
Claim · model-written summary
Straw mulch significantly reduced aphid infestation on potato leaves in all years.
- Taxon
- potatoes
Solanum tuberosumt0 - Treatment
- mulchinge0
- Interactor
- aphide0pest
- Outcome
- aphid infestation on leavese0
- Direction
- reducede0
- Qualifier
- In all yearse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In all years mulching significantly reduced aphid infestation on leaves”
t0“potatoes”
Claim · model-written summary
Straw mulch significantly reduced PVY incidence in potato tubers in all years.
- Taxon
- potatoesSolanum tuberosumt0
- Treatment
- mulchinge0
- Interactor
- PVY
Potato virus Ye0pathogen - Outcome
- PVY incidence in tuberse0
- Direction
- reducede0
- Qualifier
- In all yearse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In all years mulching significantly reduced aphid infestation on leaves as well as PVY incidence in tubers”
t0“potatoes”
Claim · model-written summary
Presprouting decreased PVY incidence when aphid flight activity was low at early emergence.
- Taxon
- potatoesSolanum tuberosumt0
- Treatment
- Presproutinge0
- Interactor
- PVYPotato virus Ye0pathogen
- Outcome
- PVY incidencee0
- Direction
- decreasede0
- Qualifier
- aphid spring flight activity was lowe0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Presprouting decreased PVY incidence when in the phase of early crop emergence aphid spring flight activity was low”
t0“potatoes”
Claim · model-written summary
Presprouting increased PVY incidence nonsignificantly when early aphid flight peaks occurred.
- Taxon
- potatoesSolanum tuberosumt0
- Treatment
- Presproutinge1
- Interactor
- PVYPotato virus Ye1pathogen
- Outcome
- PVY incidencee1
- Direction
- increasede0
- Qualifier
- prominent aphid flight peakse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“increased it, although not significantly, when prominent aphid flight peaks occurred in this critical period”
t0“potatoes”
e1“Presprouting decreased PVY incidence”
Claim · model-written summary
Straw mulch was most effective with vector pressure early in the year.
- Taxon
- potatoesSolanum tuberosumt0
- Treatment
- Straw mulche0
- Interactor
- PVYPotato virus Ye0pathogen
- Outcome
- PVY protectant for young plantse0
- Direction
- most effectivee0
- Qualifier
- vector pressure was concentrated early in the yeare0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Straw mulch was most effective when vector pressure was concentrated early in the year acting as a PVY protectant for young plants”
t0“potatoes”
Claim · model-written summary
Straw mulch efficacy declined at later growth stages as crop ground coverage increased.
- Taxon
- potatoesSolanum tuberosumt0
- Organ / stage
- later growth stagese0
- Outcome
- its effecte0
- Direction
- declinede0
- Qualifier
- increasing ground coverage of the crope0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In later growth stages its effect declined gradually with increasing ground coverage of the crop”
t0“potatoes”
Claim · model-written summary
Combined mulching and presprouting had a synergistic effect on reducing PVY incidence.
- Taxon
- potatoesSolanum tuberosumt0
- Treatment
- Combined mulching and presproutinge0
- Interactor
- PVYPotato virus Ye0pathogen
- Outcome
- PVY incidencee0
- Direction
- reductione0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Combined mulching and presprouting had a synergistic, complementary effect on reduction of PVY incidence”
t0“potatoes”
Claim · model-written summary
Scaling mulched area from 100 to 900 square meters kept aphid infestation reduced.
- Taxon
- potatoesSolanum tuberosumt0
- Treatment
- scaling up the area mulched stepwise from 100 m 2 to 900 m 2e0
- Interactor
- aphide0pest
- Outcome
- aphid infestatione0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“scaling up the area mulched stepwise from 100 m 2 to 900 m 2 consistently kept aphid infestation at reduced levels”
t0“potatoes”
The same questions in other papers
mulching · pest · Solanum tuberosum (potato)Positive and negative results
11 papers in the same direction as this paper · 4 in the opposite direction
- positive
- no effect
- negative
12 papers more in this group
See all 16 papers →mulching · Potato virus Y · Solanum tuberosum (potato)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.