Abstract
Twospotted spider mite, Tetranychus urticae Koch, populations on June-bearing strawberries, Fragaria × ananassa Duchesne ‘Totem,’ declined rapidly in early summer in western Washington in a manner similar to that observed on strawberry cultivars grown in other locations. A mite population decline also occurred on greenhouse-grown plants maintained in liquid culture. With these plants, nitrogen supply and sampling date had highly significant effects on leaf nitrogen content, but only sampling date had a detectable effect on spider mite numbers. Heavy infestation of mites on greenhouse-grown strawberry plants rendered newly formed and noninfested leaves on these plants less susceptible to future mite attack than leaves on plants that had been kept free of mites. This suggests that induced resistance may be a factor in fluctuation of spider mite populations on strawberry.
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Claims 5
Claim · model-written summary
Twospotted spider mite populations on Totem strawberries declined rapidly in early summer in western Washington.
- Taxon
- strawberries
_single2.jpg?width=60)
Fragaria ×ananassae0 - Material
- ‘Totem,’e0
- Interactor
- Tetranychus urticae Koch
.jpg?width=60)
Tetranychus urticaee0pest - Outcome
- Twospotted spider mite, Tetranychus urticae Koch, populationse0
- Direction
- declined rapidlye0
- Setting
- western Washingtone0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
_single2.jpg?width=500)
.jpg?width=500)
Verbatim
e0“Twospotted spider mite, Tetranychus urticae Koch, populations on June-bearing strawberries, Fragaria × ananassa Duchesne ‘Totem,’ declined rapidly in early summer in western Washington”
Claim · model-written summary
Mite populations also declined on greenhouse strawberry plants in liquid culture.
- Taxon
- strawberryFragaria ×ananassat0
- Outcome
- mite population declinee0
- Direction
- declinee0
- Setting
- greenhouse-grown plants maintained in liquid culturee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“A mite population decline also occurred on greenhouse-grown plants maintained in liquid culture.”
t0“on Strawberry”
Claim · model-written summary
Nitrogen supply and sampling date significantly affected strawberry leaf nitrogen content.
- Taxon
- strawberryFragaria ×ananassat0
- Organ / stage
- leafe0
- Treatment
- nitrogen supplye0
- Outcome
- leaf nitrogen contente0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“nitrogen supply and sampling date had highly significant effects on leaf nitrogen content”
t0“on Strawberry”
Claim · model-written summary
Only sampling date had a detectable effect on spider mite numbers.
- Taxon
- strawberryFragaria ×ananassat0
- Interactor
- spider mitee0pest
- Outcome
- spider mite numberse0
- Qualifier
- sampling datee0
Not reportedSettingDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“but only sampling date had a detectable effect on spider mite numbers.”
t0“on Strawberry”
Claim · model-written summary
Previous heavy mite infestation reduced susceptibility of newly formed uninfested strawberry leaves to later mite attack.
- Taxon
- strawberryFragaria ×ananassae0
- Organ / stage
- newly formed and noninfested leavese0
- Treatment
- Heavy infestation of mitese0
- Interactor
- mitese0pest
- Outcome
- susceptible to future mite attacke0
- Direction
- less susceptiblee0
- Comparator
- plants that had been kept free of mitese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Heavy infestation of mites on greenhouse-grown strawberry plants rendered newly formed and noninfested leaves on these plants less susceptible to future mite attack than leaves on plants that had been kept free of mites.”
The same questions in other papers
infection · disease · Fragaria x ananassa (strawberry)Positive and negative results
3 in the opposite direction
- negative
- no effect
- negative
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.