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Cultivation factors influencing spraing in potato‐a statistical analysis
Author(s) -
LOEVGREN R. L.,
ERIKSSON K. B.
Publication year - 1989
Publication title -
eppo bulletin
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.327
H-Index - 36
eISSN - 1365-2338
pISSN - 0250-8052
DOI - 10.1111/j.1365-2338.1989.tb00438.x
Subject(s) - sowing , agronomy , crop , crop rotation , irrigation , biology , human fertilization
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.