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SUGAR‐BEET YELLOWS: FURTHER STUDIES ON VIRUSES AND VIRUS STRAINS AND THEIR DISTRIBUTION IN EAST ANGLIA, 1958‐59
Author(s) -
RUSSELL G. E.
Publication year - 1960
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.1744-7348.1960.tb03571.x
Subject(s) - sugar beet , biology , sugar , virus , aphid , agronomy , plant virus , chenopodiaceae , horticulture , botany , virology , food science
Experiments have shown that, as in the years 1955‐57, two yellowing viruses, beet yellows virus (SBYV) and sugar‐beet mild yellowing virus (SBMYV), were present in commercial sugar‐beet crops in East Anglia in 1958 and 1959. The evidence that they are not closely related viruses has been confirmed. In both years the prevalence of the two viruses was estimated by aphid transmissions from yellowed sugar‐beet leaves to healthy sugar beet and Chenopodium capitatum seedlings in the glasshouse, and in 1959 additionally by examination of symptoms on field plants. SBMYV was more common than SBYV over the whole region in 1958, but in 1959 SBYV was slightly more prevalent than SBMYV. In both years SBYV was found more often in the southern than in the northern parts of the region. The results described in this paper suggest that breeding for tolerance to SBMYV may be at least as important economically in East Anglia as breeding for tolerance to SBYV. A wide range of SBYV strains was present in East Anglia in 1959, most of the strains being those which caused severe symptoms in sugar beet and C. capitatum.