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The effect of beet cyst nematode, Heterodera schachtii , on the yield of sugar beet in organic soils
Author(s) -
COOKE D. A.
Publication year - 1991
Publication title -
annals of applied biology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.677
H-Index - 80
eISSN - 1744-7348
pISSN - 0003-4746
DOI - 10.1111/j.1744-7348.1991.tb06093.x
Subject(s) - heterodera schachtii , sugar beet , biology , yield (engineering) , sugar , agronomy , nematode , soil water , population , horticulture , ecology , food science , materials science , demography , sociology , metallurgy
Summary In ten experiments on commercial sugar‐beet crops grown on organic soils in 1984–86, a Genstat programme was used to examine the relationship between the initial population of Heterodera schachtii and sugar‐beet root yield using the equation Y = Ymin + (Ymax ‐ Ymin) Z pi‐T Fixing T = 200 eggs + juveniles 100 g ‐1 soil and Z T = 0.95, estimated values of Ymax varied from 49.2–67.1 t ha ‐1 (129– 155% of the national average root yield for the years in which the experiments were carried out) and estimates of Ymin varied from 14.5–53.9 t ha ‐1 (27–94% of Ymax). The estimated average root yield loss caused by the nematode was 6.95 t ha ‐1 .