Abstract
In an attempt to study the effects of cultivation factors on the incidence of spraing in potato, on the presence of tobacco rattle tobravirus (TRV) and potato mop‐top furovirus (PMTV), and on the densities of trichodorid nematodes in field soils, a statistical analysis was conducted based on field records provided by a Swedish potato crisp industry. The factors studied were crop rotation, precipitation (irrigation inclusive), planting time, fertilization, plant‐available P, K and B, soil texture and soil pH. The data were collected for 1979‐1987, representing 50 farms (198 fields) in southern Sweden. A correlation was found between TRV infectivity in the autumn and planting time of the potato crop. Thus, late planting was correlated with lower frequency of TRV. By ANOVA test of 5 years of preceding crops, a possible spraing increase was indicated when numbers of potato or barley crops increased in the crop rotations. A possible spraing decrease was indicated when the share of wheat increased. High incidence of spraing, and high densities of trichodorid nematodes, were both correlated with low values of plant‐available potassium, K AL , in soil.
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Claims 4
Claim · model-written summary
Late planting correlated with lower TRV frequency.
- Taxon
- potato
Solanum tuberosumt0 - Treatment
- late plantinge0
- Interactor
- TRVTobacco rattle viruse0pathogen
- Outcome
- frequency of TRVe0
- Direction
- lowere0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“late planting was correlated with lower frequency of TRV”
t0“potato”
Claim · model-written summary
More potato or barley crops in rotation indicated a possible spraing increase.
- Taxon
- potatoSolanum tuberosume0
- Treatment
- potato or barley cropse0
- Outcome
- sprainge0
- Direction
- increasee0
- Qualifier
- possiblee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“a possible spraing increase was indicated when numbers of potato or barley crops increased in the crop rotations”
Claim · model-written summary
A higher wheat share indicated a possible spraing decrease.
- Taxon
- potatoSolanum tuberosumt0
- Treatment
- wheate0
- Outcome
- sprainge0
- Direction
- decreasee0
- Qualifier
- possiblee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“A possible spraing decrease was indicated when the share of wheat increased”
t0“potato”
Claim · model-written summary
High spraing incidence correlated with low soil available potassium.
- Taxon
- potatoSolanum tuberosumt0
- Interactor
- trichodorid nematodese0pest
- Compound
- plant‐available potassiume0
- Outcome
- incidence of sprainge0
- Direction
- Highe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“High incidence of spraing, and high densities of trichodorid nematodes, were both correlated with low values of plant‐available potassium, K AL , in soil”
t0“potato”