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The spread of yellows viruses in sugar beet
Author(s) -
KERSHAW W. J. S.
Publication year - 1965
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.1744-7348.1965.tb01231.x
Subject(s) - myzus persicae , biology , sugar beet , aphis , plant virus , virus , virology , luteovirus , closterovirus , botany , horticulture , aphid
SUMMARY In 1963 and 1964 single sugar‐beet plants (infectors) growing in commercial root crops were infected with either beet yellows virus (BYV), beet mild yellowing virus (BMYV), or both viruses, by viruliferous Myzus persicae (Sulz.). Virus‐free aphids were put on other beet plants. All the M. persicae were then removed, but in 1964 additional ones, either virus‐free or viruliferous, were put on half the plots. More plants subsequently became infected with yellows viruses in plots containing infectors than in those without. In 1963 more virus spread from BYV than from BMYV infectors; in 1964 the reverse happened. Usually less of either virus spread from plants with dual infection than from those singly infected. In 1964 more virus spread in plots where additional viruliferous apterae of M. persicae were set free on infector plants than in others where the aphids were removed. The greater spread of BYV than of BMYV in 1963 is attributed to transmission by Aphis fabae Scop., which was exceptionally abundant. The greater spread of BMYV than of BYV in 1964 is attributed to differences in the virus‐vector relationships of the two viruses when transmitted by M. persicae only.