Abstract
The influence of long and short daylengths on twospotted spider mite (TSSM) ( Tetranychus urticae Koch) resistance of strawberry ( Fragaria × ananassa Duch.) foliage was studied. Photoperiods of 8 hours (short daylength) and continuous light (long daylength) altered the seasonal change in susceptibility of `Redchief' strawberry foliage to TSSM. Plants exposed to continuous light rapidly became resistant, those exposed to short daylength remained relatively susceptible, and plants under natural daylength exhibited the seasonal change of slowly increasing resistance. Plants resistant to TSSM under long daylength became susceptible 19 days after being switched to a short daylength. Plants that were switched from short to long daylength changed from TSSM susceptible to resistant. Field-grown plants of `Redchief', a short-day sensitive cultivar, and `Tribute', a day-neutral cultivar, exhibited increasing resistance to TSSM from 2 weeks before bloom until 2 weeks into harvest when greatest resistance was observed. These results suggest that TSSM resistance in strawberry is influenced by daylength and that this effect may be independent of daylength effects on strawberry reproductive development.
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Claims 8
Claim · model-written summary
Continuous light rapidly made Redchief strawberry foliage resistant to TSSM.
- Taxon
- strawberry
_single2.jpg?width=60)
Fragaria ×ananassat0 - Material
- Redchiefe1
- Treatment
- continuous lighte0
- Interactor
- Twospotted Spider Mitet0pest
- Outcome
- resistante0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
_single2.jpg?width=500)
Verbatim
e0“Plants exposed to continuous light rapidly became resistant”
t0“Daylength and Resistance of Strawberry Foliage to the Twospotted Spider Mite”
e1“`Redchief' strawberry foliage to TSSM”
Claim · model-written summary
Short daylength kept Redchief strawberry foliage relatively susceptible to TSSM.
- Taxon
- strawberryFragaria ×ananassat0
- Material
- Redchiefe1
- Treatment
- short daylengthe0
- Interactor
- Twospotted Spider Mitet0pest
- Outcome
- relatively susceptiblee0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“those exposed to short daylength remained relatively susceptible”
t0“Daylength and Resistance of Strawberry Foliage to the Twospotted Spider Mite”
e1“`Redchief' strawberry foliage to TSSM”
Claim · model-written summary
Under natural daylength, resistance increased slowly with the season.
- Taxon
- strawberryFragaria ×ananassat0
- Interactor
- Twospotted Spider Mitet0pest
- Outcome
- resistancee0
- Direction
- increasinge0
- Qualifier
- natural daylengthe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“plants under natural daylength exhibited the seasonal change of slowly increasing resistance”
t0“Daylength and Resistance of Strawberry Foliage to the Twospotted Spider Mite”
Claim · model-written summary
Plants resistant under long daylength became susceptible 19 days after switching to short daylength.
- Taxon
- strawberryFragaria ×ananassat0
- Treatment
- switched to a short daylengthe0
- Interactor
- TSSMe0pest
- Outcome
- susceptiblee0
- Value
- 19 dayse0
- Comparator
- long daylengthe0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Plants resistant to TSSM under long daylength became susceptible 19 days after being switched to a short daylength”
t0“strawberry”
Claim · model-written summary
Plants switched from short to long daylength changed from susceptible to resistant to TSSM.
- Taxon
- strawberryFragaria ×ananassat0
- Treatment
- switched from short to long daylengthe0
- Interactor
- TSSMe0pest
- Outcome
- TSSM susceptible to resistante0
- Comparator
- shorte0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Plants that were switched from short to long daylength changed from TSSM susceptible to resistant”
t0“strawberry”
Claim · model-written summary
Field-grown Redchief plants increased resistance to TSSM from two weeks before bloom through two weeks into harvest.
- Taxon
- strawberryFragaria ×ananassat0
- Material
- Redchiefe0
- Interactor
- TSSMe0pest
- Outcome
- resistance to TSSMe0
- Direction
- increasinge0
- Qualifier
- from 2 weeks before bloom until 2 weeks into harveste0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Field-grown plants of `Redchief', a short-day sensitive cultivar, and `Tribute', a day-neutral cultivar, exhibited increasing resistance to TSSM from 2 weeks before bloom until 2 weeks into harvest when greatest resistance was observed”
t0“strawberry”
Claim · model-written summary
Field-grown Tribute plants increased resistance to TSSM from two weeks before bloom through two weeks into harvest.
- Taxon
- strawberryFragaria ×ananassat0
- Material
- Tributee0
- Interactor
- TSSMe0pest
- Outcome
- resistance to TSSMe0
- Direction
- increasinge0
- Qualifier
- from 2 weeks before bloom until 2 weeks into harveste0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Field-grown plants of `Redchief', a short-day sensitive cultivar, and `Tribute', a day-neutral cultivar, exhibited increasing resistance to TSSM from 2 weeks before bloom until 2 weeks into harvest when greatest resistance was observed”
t0“strawberry”
Claim · model-written summary
The authors suggest that strawberry resistance to TSSM depends on daylength and may be independent of reproductive development.
- Taxon
- strawberryFragaria ×ananassae0
- Treatment
- daylengthe0
- Interactor
- TSSMe0pest
- Outcome
- TSSM resistancee0
- Qualifier
- may be independent of daylength effects on strawberry reproductive developmente0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“TSSM resistance in strawberry is influenced by daylength and that this effect may be independent of daylength effects on strawberry reproductive development”
The same questions in other papers
light · disease · Fragaria x ananassa (strawberry)Positive and negative results
4 papers in the same direction as this paper · 1 reporting no difference from an alternative
- no effect
- positive
- positive
2 papers more in this group
See all 6 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.