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Epidemiology of barley yellow dwarf virus in ontario and quebec canada in 1982 and 1983






Canadian Plant Disease Survey 64(1): 21-24

Epidemiology of barley yellow dwarf virus in ontario and quebec canada in 1982 and 1983

An epidemic of barley yellow dwarf virus (BYDV) occurred in winter wheat and barley crops in most parts of Ontario and Quebec in 1982-83. Infection of winter wheat averaged 50% but up to 100% BYDV infection was evident in barley fields in south-central Ontario. A vector nonspecific strain of the virus was predominant in winter wheat although levels of a Rhopalosiphum padi-specific and a R. maidis-specific strains were also significant. The high incidence of BYDV in winter cereals in the autumn apparently resulted from a large aphid migration in Oct. In the summer of 1983, there was little evidence of transfer of BYDV from the winter cereals to the spring grains in Ontario. In mid-Aug. BYDV appeared rather suddenly in many areas of Quebec, causing some damage to late-seeded fields.


Accession: 005375914



Related references

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